Debt-to-Assets Ratio Calculator: Know Your Leverage

What does a ratio of 40.00% mean?

On the defaults — $400,000 of total debt and $1,000,000 of total assets — the debt-to-assets ratio is 40.00% (ratio decimal 0.4000), which means 40 cents of every asset dollar is financed by debt. The implied equity is $1,000,000.00 − $400,000.00 = $600,000.00, and the ratio is $400,000.00 ÷ $1,000,000.00 = 40.00%. A ratio of 40.00% means the debt finances two-fifths of everything the business owns and the owners fund three-fifths outright from day one — for every $100 of assets, $40 is borrowed and $60 is owned. Whether that is comfortable or tight depends on the lender and on how steady the business's income is — a 40.00% ratio against steady income is the usual line where lenders stop asking questions, and the same 40.00% against shaky income still leaves the business exposed if the assets' value slips.

Three things about the model are worth stating plainly.

First, the division is $400,000.00 ÷ $1,000,000.00 = 40.00%, and the ratio decimal is 0.4000 — the percent and the decimal are two outputs, never the same number. Second, the meaning is 40 cents of every asset dollar is financed by debt — the debt's share of everything the business owns, not the monthly payment and not the interest rate. And third, the ratio is displayed as a percent to two decimals, half-up, and a ratio that displays as 40.00% can sit a hair below or above the displayed figure: $399,999.50 of debt and $1,000,000 of total assets gives 39.999950%, which displays as 40.00%, and $234,567.89 of debt and $876,543.21 of total assets gives 26.760562%, which displays as 26.76% — all listed in Accuracy & limitations.

The worked example, line by line

Setup: total debt $400,000, total assets $1,000,000.

Line 1 — the implied equity. $1,000,000.00 − $400,000.00 = $600,000.00.

Line 2 — the ratio. $400,000.00 ÷ $1,000,000.00 = 40.00% (unrounded 40.000000%; ratio decimal 0.4000).

Line 3 — the check. At $500,000 of total debt the ratio is 50.00%; and at $499,999 it is 49.999900% — below 50.00%.

Every branch, checked

Debt $200,000: total debt $200,000.00; total assets $1,000,000.00; implied equity $800,000.00; debt-to-assets ratio 20.00% (ratio decimal 0.2000) — With $200,000 of total debt the ratio falls to 20.00%.

Debt $600,000: total debt $600,000.00; total assets $1,000,000.00; implied equity $400,000.00; debt-to-assets ratio 60.00% (ratio decimal 0.6000) — With $600,000 of total debt the ratio rises to 60.00%.

Assets $800,000: total debt $400,000.00; total assets $800,000.00; implied equity $400,000.00; debt-to-assets ratio 50.00% (ratio decimal 0.5000) — With $800,000 of total assets the ratio rises to 50.00%.

Assets $1,250,000: total debt $400,000.00; total assets $1,250,000.00; implied equity $850,000.00; debt-to-assets ratio 32.00% (ratio decimal 0.3200) — With $1,250,000 of total assets the ratio falls to 32.00%.

Debt $300,000: total debt $300,000.00; total assets $1,000,000.00; implied equity $700,000.00; debt-to-assets ratio 30.00% (ratio decimal 0.3000) — With $300,000 of total debt the ratio falls to 30.00%.

Assets $500,000: total debt $400,000.00; total assets $500,000.00; implied equity $100,000.00; debt-to-assets ratio 80.00% (ratio decimal 0.8000) — With $500,000 of total assets the ratio rises to 80.00%.

Debt $750,000: total debt $750,000.00; total assets $1,000,000.00; implied equity $250,000.00; debt-to-assets ratio 75.00% (ratio decimal 0.7500) — With $750,000 of total debt the ratio rises to 75.00%.

Assets $2,000,000: total debt $400,000.00; total assets $2,000,000.00; implied equity $1,600,000.00; debt-to-assets ratio 20.00% (ratio decimal 0.2000) — With $2,000,000 of total assets the ratio falls to 20.00%.

The reverses, worked backwards

Smallest total debt for the ratio to REACH 50%: At the displayed $500,000 the figures are total debt $500,000.00; total assets $1,000,000.00; implied equity $500,000.00; debt-to-assets ratio 50.00% (unrounded 50.000000%) (ratio decimal 0.5000). At $499,999 the ratio is 49.999900% unrounded — below the target, though it displays as 50.00% — so $500,000 is the smallest total debt for the ratio to REACH 50%.

Largest total assets for the ratio to STAY at or above 45%: At the displayed $888,888 the figures are total debt $400,000.00; total assets $888,888.00; implied equity $488,888.00; debt-to-assets ratio 45.00% (unrounded 45.000045%) (ratio decimal 0.4500). At $888,889 the ratio is 44.999994% unrounded — below the target — and at $888,887 the ratio is 45.000096% unrounded — above the target — so $888,888 is the largest total assets for the ratio to STAY at or above 45%.

Smallest total debt for the ratio to REACH 60%: At the displayed $600,000 the figures are total debt $600,000.00; total assets $1,000,000.00; implied equity $400,000.00; debt-to-assets ratio 60.00% (unrounded 60.000000%) (ratio decimal 0.6000). At $599,999 the ratio is 59.999900% unrounded — below the target, though it displays as 60.00% — so $600,000 is the smallest total debt for the ratio to REACH 60%.

Largest total debt for the ratio to STAY at or below 25%: At the displayed $250,000 the figures are total debt $250,000.00; total assets $1,000,000.00; implied equity $750,000.00; debt-to-assets ratio 25.00% (unrounded 25.000000%) (ratio decimal 0.2500). At $250,001 the ratio is 25.000100% unrounded — above the target, though it displays as 25.00% — so $250,000 is the largest total debt for the ratio to STAY at or below 25%.

Smallest total assets for the ratio to STAY at or below 40%: At the displayed $1,000,000 the figures are total debt $400,000.00; total assets $1,000,000.00; implied equity $600,000.00; debt-to-assets ratio 40.00% (unrounded 40.000000%) (ratio decimal 0.4000). At $999,999 the ratio is 40.000040% unrounded — above the target, though it displays as 40.00% — so $1,000,000 is the smallest total assets for the ratio to STAY at or below 40%.

Largest total assets for the ratio to STAY at or above 30%: At the displayed $1,333,333 the figures are total debt $400,000.00; total assets $1,333,333.00; implied equity $933,333.00; debt-to-assets ratio 30.00% (unrounded 30.000008%) (ratio decimal 0.3000). At $1,333,334 the ratio is 29.999985% unrounded — below the target — and at $1,333,332 the ratio is 30.000030% unrounded — above the target — so $1,333,333 is the largest total assets for the ratio to STAY at or above 30%.

A warning about the neighbours: every neighbour above sits one dollar from the star, and every neighbour ratio is a hair below or above the target even though it displays as the target — a one-dollar move in debt or assets moves the percent by about 0.00004 points, so the displayed two-decimal figure cannot tell the star from its neighbour. The page prints the unrounded six-decimal percent in full so the rounding does not mislead you: 50.000000, 49.999900, 45.000045, 44.999994, 45.000096, 60.000000, 59.999900, 25.000000, 25.000100, 40.000000, 40.000040, 30.000008, 29.999985, 30.000030.

What the defaults assume

The defaults are $400,000 of total debt and $1,000,000 of total assets — total debt $400,000.00; total assets $1,000,000.00; implied equity $600,000.00; debt-to-assets ratio 40.00% (ratio decimal 0.4000). With Debt $200,000, total debt $200,000.00; total assets $1,000,000.00; implied equity $800,000.00; debt-to-assets ratio 20.00% (ratio decimal 0.2000). With Debt $600,000, total debt $600,000.00; total assets $1,000,000.00; implied equity $400,000.00; debt-to-assets ratio 60.00% (ratio decimal 0.6000). With Assets $800,000, total debt $400,000.00; total assets $800,000.00; implied equity $400,000.00; debt-to-assets ratio 50.00% (ratio decimal 0.5000). With Assets $1,250,000, total debt $400,000.00; total assets $1,250,000.00; implied equity $850,000.00; debt-to-assets ratio 32.00% (ratio decimal 0.3200). With Debt $300,000, total debt $300,000.00; total assets $1,000,000.00; implied equity $700,000.00; debt-to-assets ratio 30.00% (ratio decimal 0.3000). With Assets $500,000, total debt $400,000.00; total assets $500,000.00; implied equity $100,000.00; debt-to-assets ratio 80.00% (ratio decimal 0.8000). With Debt $750,000, total debt $750,000.00; total assets $1,000,000.00; implied equity $250,000.00; debt-to-assets ratio 75.00% (ratio decimal 0.7500). With Assets $2,000,000, total debt $400,000.00; total assets $2,000,000.00; implied equity $1,600,000.00; debt-to-assets ratio 20.00% (ratio decimal 0.2000). With All zero, total debt $0.00; total assets $0.00; debt-to-assets ratio undefined — no debt, no assets, and the ratio is undefined. With Debt $250,000, assets $500,000, total debt $250,000.00; total assets $500,000.00; implied equity $250,000.00; debt-to-assets ratio 50.00% (ratio decimal 0.5000) — half of everything the business owns is financed by debt. With Fractional inputs (ratio unrounded 39.999950%), total debt $399,999.50; total assets $1,000,000.00; implied equity $600,000.50; debt-to-assets ratio 40.00% (unrounded 39.999950%) (ratio decimal 0.4000) — the ratio displays as 40.00%. With Debt $1,600,000, assets $2,000,000, total debt $1,600,000.00; total assets $2,000,000.00; implied equity $400,000.00; debt-to-assets ratio 80.00% (ratio decimal 0.8000) — the same ratio at four times the size. With Debt $0, total debt $0.00; total assets $1,000,000.00; implied equity $1,000,000.00; debt-to-assets ratio 0.00% (ratio decimal 0.0000) — no debt at all, a real figure, not undefined. With Assets $0, total debt $600,000.00; total assets $0.00; debt-to-assets ratio undefined — no assets to divide by. With Negative debt, total debt −$10,000.00; total assets $1,000,000.00; implied equity $1,010,000.00; debt-to-assets ratio −1.00% (ratio decimal −0.0100) — the ratio is negative, a real figure. With Small numbers, total debt $8,000.00; total assets $10,000.00; implied equity $2,000.00; debt-to-assets ratio 80.00% (ratio decimal 0.8000) — four-fifths of a small business's assets are financed by debt. With Fractional inputs (ratio unrounded 26.760562%), total debt $234,567.89; total assets $876,543.21; implied equity $641,975.32; debt-to-assets ratio 26.76% (unrounded 26.760562%) (ratio decimal 0.2676) — the ratio displays as 26.76%. With Over 100% (negative equity), total debt $1,100,000.00; total assets $1,000,000.00; implied equity −$100,000.00; debt-to-assets ratio 110.00% (ratio decimal 1.1000) — the debts are bigger than everything the business owns. With Debt $175,000, assets $350,000, total debt $175,000.00; total assets $350,000.00; implied equity $175,000.00; debt-to-assets ratio 50.00% (ratio decimal 0.5000) — half of everything the business owns is financed by debt.

A note on the rounding: the ratio is displayed as a percent to two decimals, half-up. With the fractional inputs the unrounded ratio is 39.999950% — it displays as 40.00% — and with the other fractional inputs it is 26.760562% — it displays as 26.76%. The page prints the unrounded value so the rounding does not mislead you.

Output · formula · meaning

Who uses this

• The small-business owner checking leverage: they learn $400,000 of debt against $1,000,000 of assets is a ratio of 40.00% — and they check the $500,000 reverse to see the debt that pushes the ratio to 50.00%.
• The lender sizing a loan: they learn a ratio of 40.00% means 40 cents of every asset dollar is financed by debt — and they check the $888,888 reverse to see how many assets keep the ratio at or above 45.00%.
• The investor reading a balance sheet: they learn the ratio rises when the debt rises or the assets fall — and they check the $1,000,000 reverse to see the assets that keep the ratio at or below 40.00%.
• The student learning leverage ratios: they learn the ratio is the total debt divided by the total assets — and they check the $250,000 reverse to see how much debt keeps the ratio at or below 25.00%.

Accuracy & limitations

The math is first-principles: the debt-to-assets ratio is the total debt divided by the total assets — all in dollars, the ratio displayed as a percent to two decimals half-up, and as a ratio decimal to four decimals. There IS division in this calculator — at $0 of total debt and $0 of total assets the ratio is UNDEFINED, division by zero, no assets to divide by — the calculator shows “ratio undefined” with a note, never hides it. The ratio is also undefined when total assets are $0 for any other reason, for example $600,000 of debt against $0 of total assets. At $0 of total debt the ratio is 0.00% — a real figure, not undefined — and at a negative debt the ratio is negative: −$10,000 of debt against $1,000,000 of total assets gives −1.00% (unrounded −1.000000%) — a real figure, shown with the U+2212 minus sign. Negative total assets are NOT meaningful — assets are never negative — say so plainly and do not treat a negative assets figure as a real case. With the fractional inputs the unrounded ratio is 39.999950% — it displays as 40.00% — and with the other fractional inputs it is 26.760562% — it displays as 26.76%. What the model cannot do is say whether 40.00% is a good ratio: the ratio says nothing about what the debt costs — a 40.00% ratio at a low rate is comfortable and the same 40.00% at a punishing rate still leaves the business exposed if the assets' value slips. It also says nothing about when the debt falls due — the ratio lumps the whole debt into one number. Use it to see what share of everything the business owns is financed by debt — then check the debt-to-equity, equity-ratio and debt-to-capital calculators before you decide the leverage is right.

Frequently asked questions