Is a 4.00 inventory turnover ratio high or low?
On the defaults — $800,000 of cost of goods sold and $200,000 of average inventory — the inventory turnover ratio is 4.00 times. A 4.00 ratio is neither high nor low on its own: it means the whole stock sells and is replaced four times a year — about every 91.25 days. Typical ratios run 4–6 for general retail, 12 or higher for groceries (food sells fast and spoils), and lower for luxury goods and furniture (slow, high-value stock). A ratio that falls year after year while inventory rises is the classic overstock warning — the business is buying stock faster than it sells it. The ratio is read year over year and within one industry: a grocer at 12.00 and a jeweller at 1.50 can both be healthy, because their stock turns at different speeds by design.
Three things about the model are worth stating plainly.
First, the inventory turnover ratio is $800,000 ÷ $200,000 = 4.00 times. Second, the cost of goods sold needed for a 6.00 ratio is 6.00 × $200,000 = $1,200,000.00. And third, the average inventory allowed for a 6.00 ratio is $800,000 ÷ 6.00 = $133,333.33; all listed in Accuracy & limitations.
The worked example, line by line
Setup: $800,000 cost of goods sold, $200,000 average inventory, target ratio 6.00.
Line 1 — the inventory turnover ratio. The ratio is $800,000 ÷ $200,000 = 4.00 times.
Line 2 — the days inventory outstanding. The days are 365 ÷ 4.00 = 91.25 days.
Line 3 — the cost of goods sold needed. The cost of goods sold needed for a 6.00 ratio is 6.00 × $200,000 = $1,200,000.00.
Line 4 — the average inventory allowed. The average inventory allowed for a 6.00 ratio is $800,000 ÷ 6.00 = $133,333.33.
Line 5 — the check. $1,200,000.00 ÷ $200,000.00 = 6.00 times, the target ratio; and $800,000.00 ÷ $133,333.33 = 6.00 times, the target ratio.
Every branch, checked
Cost of goods sold $1,000,000: Cost of goods sold $1,000,000.00; average inventory $200,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $166,666.67 — With cost of goods sold of $1,000,000 the ratio rises to 5.00 times — the stock sells in 73.00 days.
Average inventory $160,000: Cost of goods sold $800,000.00; average inventory $160,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $960,000.00; average inventory allowed for the 6.00 target $133,333.33 — With average inventory of $160,000 the ratio rises to 5.00 times — the stock sells in 73.00 days.
Cost of goods sold $600,000: Cost of goods sold $600,000.00; average inventory $200,000.00; inventory turnover ratio 3.00 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $100,000.00 — With cost of goods sold of $600,000 the ratio falls to 3.00 times — the stock sits for 121.67 days.
Average inventory $250,000: Cost of goods sold $800,000.00; average inventory $250,000.00; inventory turnover ratio 3.20 times; days inventory outstanding 114.06 days; cost of goods sold needed for the 6.00 target $1,500,000.00; average inventory allowed for the 6.00 target $133,333.33 — With average inventory of $250,000 the ratio falls to 3.20 times — the stock sits for 114.06 days.
Cost of goods sold $1,200,000: Cost of goods sold $1,200,000.00; average inventory $200,000.00; inventory turnover ratio 6.00 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.00 — With cost of goods sold of $1,200,000 the ratio reaches 6.00 times — the target ratio itself — and the stock sells in 60.83 days.
Average inventory $100,000: Cost of goods sold $800,000.00; average inventory $100,000.00; inventory turnover ratio 8.00 times; days inventory outstanding 45.63 days; cost of goods sold needed for the 6.00 target $600,000.00; average inventory allowed for the 6.00 target $133,333.33 — With average inventory of $100,000 the ratio rises to 8.00 times — the stock sells in 45.63 days.
Ratio bars — cost of goods sold $900,000, average inventory $150,000, cost of goods sold $700,000: cost of goods sold $900,000: inventory turnover ratio 4.50 times, days 81.11; average inventory $150,000: inventory turnover ratio 5.33 times, days 68.44; cost of goods sold $700,000: inventory turnover ratio 3.50 times, days 104.29 — Cost of goods sold of $900,000 gives a ratio of 4.50 times; average inventory of $150,000 gives a ratio of 5.33 times; cost of goods sold of $700,000 gives a ratio of 3.50 times.
The reverses, worked backwards
Smallest cost of goods sold for the ratio to reach 6.00: At the displayed $1,200,000 the figures are Cost of goods sold $1,200,000.00; average inventory $200,000.00; inventory turnover ratio 6.00 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.00. At the displayed $1,200,000 the ratio is 6.00 times (exactly 6.00). At $1,199,999 the ratio is 5.999995 — it displays as 6.00 but is below the 6.00 target — so $1,200,000 is the smallest whole-dollar cost of goods sold for the ratio to reach 6.00.
Largest average inventory for the ratio to STAY at or above 6.00: At the displayed $133,333 the figures are Cost of goods sold $800,000.00; average inventory $133,333.00; inventory turnover ratio 6.000015 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $799,998.00; average inventory allowed for the 6.00 target $133,333.33. At the displayed $133,333 the ratio is 6.000015 — it displays as 6.00 but is above the 6.00 target. At $133,334 the ratio is 5.99997 — it displays as 6.00 but is below the 6.00 target — so $133,333 is the largest whole-dollar average inventory for the ratio to stay at or above 6.00.
Smallest cost of goods sold for the ratio to reach 5.00: At the displayed $1,000,000 the figures are Cost of goods sold $1,000,000.00; average inventory $200,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 5.00 target $1,000,000.00; average inventory allowed for the 5.00 target $200,000.00. At the displayed $1,000,000 the ratio is 5.00 times (exactly 5.00). At $999,999 the ratio is 4.999995 — it displays as 5.00 but is below the 5.00 target — so $1,000,000 is the smallest whole-dollar cost of goods sold for the ratio to reach 5.00.
Largest average inventory for the ratio to STAY at or above 4.00: At the displayed $200,000 the figures are Cost of goods sold $800,000.00; average inventory $200,000.00; inventory turnover ratio 4.00 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 4.00 target $800,000.00; average inventory allowed for the 4.00 target $200,000.00. At the displayed $200,000 the ratio is 4.00 times (exactly 4.00). At $200,001 the ratio is 3.99998 — it displays as 4.00 but is below the 4.00 target — so $200,000 is the largest whole-dollar average inventory for the ratio to stay at or above 4.00.
Smallest cost of goods sold for the ratio to reach 8.00: At the displayed $1,600,000 the figures are Cost of goods sold $1,600,000.00; average inventory $200,000.00; inventory turnover ratio 8.00 times; days inventory outstanding 45.63 days; cost of goods sold needed for the 8.00 target $1,600,000.00; average inventory allowed for the 8.00 target $200,000.00. At the displayed $1,600,000 the ratio is 8.00 times (exactly 8.00). At $1,599,999 the ratio is 7.999995 — it displays as 8.00 but is below the 8.00 target — so $1,600,000 is the smallest whole-dollar cost of goods sold for the ratio to reach 8.00.
Largest average inventory for the ratio to STAY at or above 3.00: At the displayed $266,666 the figures are Cost of goods sold $800,000.00; average inventory $266,666.00; inventory turnover ratio 3.0000075 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 3.00 target $799,998.00; average inventory allowed for the 3.00 target $266,666.67. At the displayed $266,666 the ratio is 3.0000075 — it displays as 3.00 but is above the 3.00 target. At $266,667 the ratio is 2.99999625 — it displays as 3.00 but is below the 3.00 target — so $266,666 is the largest whole-dollar average inventory for the ratio to stay at or above 3.00.
A warning about the neighbours: every neighbour above sits one dollar from the star — $1 of cost of goods sold or $1 of average inventory — and every neighbour displays as the target when rounded to two decimals, yet sits below or above it. The ratio is linear in whole dollars, so the reverses have exact closed forms: the cost of goods sold needed is the target times the average inventory, and the average inventory allowed is the cost of goods sold divided by the target. The page prints the unrounded ratios in full so the rounding does not mislead you: 5.999995, 6.000015, 5.99997, 4.999995, 3.99998, 7.999995, 3.0000075 and 2.99999625.
What the defaults assume
The defaults are $800,000 of cost of goods sold, $200,000 of average inventory and a target ratio of 6.00 — Cost of goods sold $800,000.00; average inventory $200,000.00; inventory turnover ratio 4.00 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $133,333.33. With Cost of goods sold $1,000,000, Cost of goods sold $1,000,000.00; average inventory $200,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $166,666.67. With Average inventory $160,000, Cost of goods sold $800,000.00; average inventory $160,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $960,000.00; average inventory allowed for the 6.00 target $133,333.33. With Cost of goods sold $600,000, Cost of goods sold $600,000.00; average inventory $200,000.00; inventory turnover ratio 3.00 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $100,000.00. With Average inventory $250,000, Cost of goods sold $800,000.00; average inventory $250,000.00; inventory turnover ratio 3.20 times; days inventory outstanding 114.06 days; cost of goods sold needed for the 6.00 target $1,500,000.00; average inventory allowed for the 6.00 target $133,333.33. With Cost of goods sold $1,200,000, Cost of goods sold $1,200,000.00; average inventory $200,000.00; inventory turnover ratio 6.00 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.00. With Average inventory $100,000, Cost of goods sold $800,000.00; average inventory $100,000.00; inventory turnover ratio 8.00 times; days inventory outstanding 45.63 days; cost of goods sold needed for the 6.00 target $600,000.00; average inventory allowed for the 6.00 target $133,333.33. With Ratio bars, cost of goods sold $900,000: inventory turnover ratio 4.50 times, days 81.11; average inventory $150,000: inventory turnover ratio 5.33 times, days 68.44; cost of goods sold $700,000: inventory turnover ratio 3.50 times, days 104.29. With Cost of goods sold $0, Cost of goods sold $0.00; average inventory $200,000.00; inventory turnover ratio 0.00 times; days inventory outstanding undefined — nothing sold, so there is no days figure; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $0.00 — nothing sold, so there is no days figure. With Average inventory $0, Cost of goods sold $800,000.00; average inventory $0.00; inventory turnover ratio undefined — there is no stock to turn over, so there is nothing to divide by — the ratio is undefined, shown as undefined with that note, never a crash and never a made-up number. With Cost of goods sold $1,200,001, Cost of goods sold $1,200,001.00; average inventory $200,000.00; inventory turnover ratio 6.000005 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.17 (unrounded 6.000005 — displays 6.00 but is above the 6.00 target). With Average inventory $133,334, Cost of goods sold $800,000.00; average inventory $133,334.00; inventory turnover ratio 5.99997 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $800,004.00; average inventory allowed for the 6.00 target $133,333.33 (unrounded 5.99997 — displays 6.00 but is below the 6.00 target). With Cost of goods sold $800,000, Cost of goods sold $800,000.00; average inventory $200,000.00; inventory turnover ratio 4.00 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $133,333.33 (exactly 4.00). With Cost of goods sold $2,000,000, Cost of goods sold $2,000,000.00; average inventory $200,000.00; inventory turnover ratio 10.00 times; days inventory outstanding 36.50 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $333,333.33. With Ratio bars, cost of goods sold $900,000: inventory turnover ratio 4.50 times, days 81.11; average inventory $150,000: inventory turnover ratio 5.33 times, days 68.44; cost of goods sold $700,000: inventory turnover ratio 3.50 times, days 104.29. With Cost of goods sold −$50,000, Cost of goods sold −$50,000.00; average inventory $200,000.00; inventory turnover ratio −0.25 times; days inventory outstanding undefined — a negative ratio has no days reading; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target −$8,333.33 (a negative cost of goods sold means returns and adjustments exceeded purchases — a data problem, not a real turnover).
A note on the rounding: the ratio is displayed to two decimals, half-up. At $1,199,999 of cost of goods sold the unrounded ratio is 5.999995 — it displays as 6.00 but is below the 6.00 target. At $133,333 of average inventory the unrounded ratio is 6.000015 — it displays as 6.00 but is above the 6.00 target. At $133,334 of average inventory the unrounded ratio is 5.99997 — it displays as 6.00 but is below the 6.00 target. At $1,200,001 of cost of goods sold the unrounded ratio is 6.000005 — it displays as 6.00 but is above the 6.00 target. The page prints the unrounded ratios so the rounding does not mislead you.
Output · formula · meaning
| Output | Formula | What it means |
|---|
| Cost of goods sold | input | $800,000.00. |
| Average inventory | input | $200,000.00. |
| Target ratio | input | 6.00. |
| Inventory turnover ratio | cost of goods sold ÷ average inventory | 4.00 times. |
| Days inventory outstanding | 365 ÷ inventory turnover ratio | 91.25 days. |
| Cost of goods sold needed for the 6.00 target | target ratio × average inventory | $1,200,000.00. |
| Average inventory allowed for the 6.00 target | cost of goods sold ÷ target ratio | $133,333.33. |
| Verdict | how fast the stock sells and is replaced | stock sells and is replaced 4.00 times a year — about every 91.25 days. |
| Reverse: Smallest whole-dollar cost of goods sold for the ratio to reach 6.00 | step | $1,200,000 → $1,200,000. |
| Below the revr1 star | neighbor | Cost of goods sold $1,199,999.00; average inventory $200,000.00; inventory turnover ratio 5.999995 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $199,999.83. |
| Above the revr1 star | neighbor | Cost of goods sold $1,200,001.00; average inventory $200,000.00; inventory turnover ratio 6.000005 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.17. |
| Reverse: Largest whole-dollar average inventory for the ratio to STAY at or above 6.00 | step | $133,333 → $133,333. |
| Below the revr2 star | neighbor | Cost of goods sold $800,000.00; average inventory $133,332.00; inventory turnover ratio 6.000060001 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $799,992.00; average inventory allowed for the 6.00 target $133,333.33. |
| Above the revr2 star | neighbor | Cost of goods sold $800,000.00; average inventory $133,334.00; inventory turnover ratio 5.99997 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $800,004.00; average inventory allowed for the 6.00 target $133,333.33. |
| Reverse: Smallest whole-dollar cost of goods sold for the ratio to reach 5.00 | step | $1,000,000 → $1,000,000. |
| Below the revr3 star | neighbor | Cost of goods sold $999,999.00; average inventory $200,000.00; inventory turnover ratio 4.999995 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 5.00 target $1,000,000.00; average inventory allowed for the 5.00 target $199,999.80. |
| Above the revr3 star | neighbor | Cost of goods sold $1,000,001.00; average inventory $200,000.00; inventory turnover ratio 5.000005 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 5.00 target $1,000,000.00; average inventory allowed for the 5.00 target $200,000.20. |
| Reverse: Largest whole-dollar average inventory for the ratio to STAY at or above 4.00 | step | $200,000 → $200,000. |
| Below the revr4 star | neighbor | Cost of goods sold $800,000.00; average inventory $199,999.00; inventory turnover ratio 4.00002 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 4.00 target $799,996.00; average inventory allowed for the 4.00 target $200,000.00. |
| Above the revr4 star | neighbor | Cost of goods sold $800,000.00; average inventory $200,001.00; inventory turnover ratio 3.99998 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 4.00 target $800,004.00; average inventory allowed for the 4.00 target $200,000.00. |
| Reverse: Smallest whole-dollar cost of goods sold for the ratio to reach 8.00 | step | $1,600,000 → $1,600,000. |
| Below the revr5 star | neighbor | Cost of goods sold $1,599,999.00; average inventory $200,000.00; inventory turnover ratio 7.999995 times; days inventory outstanding 45.63 days; cost of goods sold needed for the 8.00 target $1,600,000.00; average inventory allowed for the 8.00 target $199,999.88. |
| Above the revr5 star | neighbor | Cost of goods sold $1,600,001.00; average inventory $200,000.00; inventory turnover ratio 8.000005 times; days inventory outstanding 45.62 days; cost of goods sold needed for the 8.00 target $1,600,000.00; average inventory allowed for the 8.00 target $200,000.13. |
| Reverse: Largest whole-dollar average inventory for the ratio to STAY at or above 3.00 | step | $266,666 → $266,666. |
| Below the revr6 star | neighbor | Cost of goods sold $800,000.00; average inventory $266,665.00; inventory turnover ratio 3.00001875 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 3.00 target $799,995.00; average inventory allowed for the 3.00 target $266,666.67. |
| Above the revr6 star | neighbor | Cost of goods sold $800,000.00; average inventory $266,667.00; inventory turnover ratio 2.99999625 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 3.00 target $800,001.00; average inventory allowed for the 3.00 target $266,666.67. |
| Cost of goods sold $1,000,000 | same model | Cost of goods sold $1,000,000.00; average inventory $200,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $166,666.67. |
| Average inventory $160,000 | same model | Cost of goods sold $800,000.00; average inventory $160,000.00; inventory turnover ratio 5.00 times; days inventory outstanding 73.00 days; cost of goods sold needed for the 6.00 target $960,000.00; average inventory allowed for the 6.00 target $133,333.33. |
| Cost of goods sold $600,000 | same model | Cost of goods sold $600,000.00; average inventory $200,000.00; inventory turnover ratio 3.00 times; days inventory outstanding 121.67 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $100,000.00. |
| Average inventory $250,000 | same model | Cost of goods sold $800,000.00; average inventory $250,000.00; inventory turnover ratio 3.20 times; days inventory outstanding 114.06 days; cost of goods sold needed for the 6.00 target $1,500,000.00; average inventory allowed for the 6.00 target $133,333.33. |
| Cost of goods sold $1,200,000 | same model | Cost of goods sold $1,200,000.00; average inventory $200,000.00; inventory turnover ratio 6.00 times; days inventory outstanding 60.83 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $200,000.00. |
| Average inventory $100,000 | same model | Cost of goods sold $800,000.00; average inventory $100,000.00; inventory turnover ratio 8.00 times; days inventory outstanding 45.63 days; cost of goods sold needed for the 6.00 target $600,000.00; average inventory allowed for the 6.00 target $133,333.33. |
| Ratio bars — cost of goods sold $900,000, average inventory $150,000, cost of goods sold $700,000 | same model | cost of goods sold $900,000: inventory turnover ratio 4.50 times, days 81.11; average inventory $150,000: inventory turnover ratio 5.33 times, days 68.44; cost of goods sold $700,000: inventory turnover ratio 3.50 times, days 104.29. |
Who uses this
- The shop owner checking the shelves before ordering: they learn $800,000 of cost of goods sold against $200,000 of average inventory is a turnover of 4.00 times — and they check the $1,200,000 reverse to see the cost of goods sold a 6.00 turnover needs.
- The buyer planning next season’s stock: they learn $133,333 of average inventory is the most the stock can carry and still hold a 6.00 turnover — and they check the $200,000 reverse to see the average inventory a 4.00 turnover allows.
- The analyst comparing two retailers in one industry: they learn the same 4.00 is a different story in a grocer and a jeweller — and they check the $1,000,000 reverse to see the cost of goods sold a 5.00 turnover needs.
- The student learning stock measures: they learn the inventory turnover ratio is cost of goods sold divided by average inventory — and they check the $1,600,000 reverse to see the cost of goods sold an 8.00 turnover needs.
Accuracy & limitations
The math is first-principles: the inventory turnover ratio is cost of goods sold divided by average inventory; the days inventory outstanding is 365 divided by the turnover; the cost of goods sold needed for the target is the target ratio times average inventory; the average inventory allowed for the target is cost of goods sold divided by the target ratio — all in whole dollars, the ratio displayed to two decimals half-up. This page uses AVERAGE inventory — (opening inventory + closing inventory) ÷ 2 — not ending inventory: a single day’s closing stock can be flattered by a clearance sale or a stock-up, so the average across the year is the honest figure for a ratio that is read year over year. Seasonal businesses need a monthly average, not just opening plus closing divided by two, or the Christmas stock-up distorts the whole year. At $0 of average inventory the ratio is UNDEFINED — there is no stock to turn over, so there is nothing to divide by — the page shows the ratio as undefined with that note, never a crash and never a made-up number. At $0 of cost of goods sold the ratio is 0.00 times and the days figure is undefined — nothing sold, so there is no days figure. A negative ratio means the cost of goods sold printed negative — at −$50,000 of cost of goods sold the ratio is −0.25 — returns and adjustments exceeded purchases, so the ratio is negative and the calculator shows the negative figure with a note, never hides it and never shows “—” for it. What the model cannot do is judge the stock: the ratio says nothing about which lines sell, how old the stock is, or whether the shelves hold the right goods — a low ratio can hide empty shelves and lost sales, and a high ratio can hide slow lines that never move. A ratio that is too high can mean empty shelves and lost sales, because there is nothing left to sell. The ratio differs from inventory to sales: inventory to sales divides sales by inventory, which uses the selling price, so it overstates turnover whenever margins are high — cost of goods sold is the honest numerator. The ratio differs from gross profit margin: margin measures how much profit each sale keeps, turnover measures how fast the stock moves — a business needs both, and a high margin with a low turnover is a slow business. The ratio differs from the current ratio: the current ratio measures whether short-term assets cover short-term bills, while turnover measures only how fast the stock moves. Use it to see how fast the stock moves — then walk the shelves.
Cite this calculatorBright Side Kit. “Inventory Turnover Ratio Calculator: How Fast Stock Sells” brightoolbox.com, 2026. Method: Inventory turnover ratio = cost of goods sold ÷ average inventory; days inventory outstanding = 365 ÷ inventory turnover ratio; cost of goods sold needed at the target = target ratio × average inventory; average inventory allowed at the target = cost of goods sold ÷ target ratio. This page uses AVERAGE inventory — (opening inventory + closing inventory) ÷ 2 — not ending inventory. Reverses: smallest whole-dollar cost of goods sold for the ratio to reach 6.00 is $1,200,000 (at $1,200,000 the ratio is 6.00 times, exactly 6.00; at $1,199,999 the ratio is 5.999995 — displays 6.00 but is below the 6.00 target); largest whole-dollar average inventory for the ratio to STAY at or above 6.00 is $133,333 (at $133,333 the ratio is 6.000015 — displays 6.00 but is above the 6.00 target; at $133,334 the ratio is 5.99997 — displays 6.00 but is below the 6.00 target); smallest whole-dollar cost of goods sold for the ratio to reach 5.00 is $1,000,000 (at $1,000,000 the ratio is 5.00 times, exactly 5.00; at $999,999 the ratio is 4.999995 — displays 5.00 but is below the 5.00 target); largest whole-dollar average inventory for the ratio to STAY at or above 4.00 is $200,000 (at $200,000 the ratio is 4.00 times, exactly 4.00; at $200,001 the ratio is 3.99998 — displays 4.00 but is below the 4.00 target); smallest whole-dollar cost of goods sold for the ratio to reach 8.00 is $1,600,000 (at $1,600,000 the ratio is 8.00 times, exactly 8.00; at $1,599,999 the ratio is 7.999995 — displays 8.00 but is below the 8.00 target); largest whole-dollar average inventory for the ratio to STAY at or above 3.00 is $266,666 (at $266,666 the ratio is 3.0000075 — displays 3.00 but is above the 3.00 target; at $266,667 the ratio is 2.99999625 — displays 3.00 but is below the 3.00 target). Defaults: Cost of goods sold $800,000.00; average inventory $200,000.00; inventory turnover ratio 4.00 times; days inventory outstanding 91.25 days; cost of goods sold needed for the 6.00 target $1,200,000.00; average inventory allowed for the 6.00 target $133,333.33 Bright Side Kit. "Inventory Turnover Ratio Calculator: How Fast Stock Sells" https://brightoolbox.com/inventory-turnover-ratio-calculator/ Accessed October 27, 2026.
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Frequently asked questions
What is the inventory turnover ratio?
Cost of goods sold divided by average inventory. On $800,000 of cost of goods sold and $200,000 of average inventory the ratio is 4.00 times — the whole stock sells and is replaced four times a year.
How do I calculate the inventory turnover ratio?
Divide the cost of goods sold by the average inventory. $800,000 ÷ $200,000 = 4.00 times.
What does a 4.00 inventory turnover ratio mean?
The whole stock sells and is replaced four times a year. A 4.00 ratio means the stock sells in 91.25 days — about every three months the shelves turn over completely.
How much do I need to sell for a 6.00 turnover?
$1,200,000 of cost of goods sold with $200,000 of average inventory. The smallest whole-dollar cost of goods sold for the ratio to reach 6.00 is $1,200,000. At $1,200,000 the ratio is 6.00 times, exactly 6.00.
How much inventory can I hold and still keep a 6.00 turnover?
$133,333 with $800,000 of cost of goods sold. The largest whole-dollar average inventory for the ratio to stay at or above 6.00 is $133,333. At $133,333 the ratio is 6.000015 — displays 6.00 but is above the 6.00 target.
What does a negative inventory turnover ratio mean?
The cost of goods sold printed negative. At −$50,000 of cost of goods sold the ratio is −0.25 — returns and adjustments exceeded purchases — a data problem, not a real turnover — and the calculator shows the negative figure with a note, never hides it and never shows “—” for it.
What if average inventory is zero?
The ratio is undefined. At $0 of average inventory the ratio is undefined — there is no stock to turn over, so there is nothing to divide by — shown as undefined with that note, never a crash and never a made-up number.
Why does $1,199,999 of cost of goods sold miss the 6.00 target?
Because $1,199,999 ÷ $200,000 = 5.999995. The ratio displays as 6.00 but is below the 6.00 target — the smallest whole-dollar cost of goods sold for the ratio to reach 6.00 is $1,200,000.