1977
Limestone mulch chart
Put your bed area, limestone mulch depth and waste allowance in: 6600 sq ft at 3 inches with 10% waste needs 7,260.00 sq ft, 67.22 cubic yards exact — order 68 cubic yards.
★ CONSTRUCTION · MULCH · LIMESTONE MULCH CHART
Limestone Mulch Chart: 6600 Sq Ft, 3 Inches, Order 68 Yards
On the defaults — a 6600 square foot bed at 3 inches deep with a 10% waste allowance — you need 7,260.00 square feet of cover, 67.22 cubic yards exact, so order 68 cubic yards. This is the LIMESTONE version — the mulch chart for limestone, pale, crushed sedimentary stone in soft grey-white tones, spread for beds and paths, that never break down — the flagstone-mulch-chart page is the FLAGSTONE version, the onyx-mulch-chart page is the ONYX version, and the mulch-chart page is the general version — the same 6600 sq ft at 3 inches with 10% waste, order 68 yards.
What does 67.22 cubic yards of limestone mulch mean?
It means a 6600 square foot bed, once the 10% waste allowance is added, needs 7,260.00 square feet of cover at 3 inches deep — 1,815.00 cubic feet, which is 67.22 cubic yards. Because mulch is sold by the whole yard, you order 68 cubic yards: the exact figure sits 0.78 yards below the next whole yard, so the order carries 0.78 yards of headroom for spillage and uneven ground. At 3 inches, one cubic yard covers 108.0 square feet, so the same bed at 2 inches would need only 44.81 yards, and at 4 inches it would need 89.63 yards.
Output · formula · meaning
| Output | Formula | What it means |
|---|---|---|
| Area needed | area × (1 + waste ÷ 100) | 7,260.00 sq ft — 6600 × 1.10. |
| Volume in cubic feet | area needed × depth ÷ 12 | 1,815.00 cubic feet — 7,260.00 × 3 ÷ 12. |
| Exact volume | area needed × depth ÷ 324 | 67.22 cubic yards — 7,260.00 × 3 ÷ 324. |
| Order quantity | round exact volume up to a whole yard | 68 cubic yards — the next whole yard above 67.22. |
| Coverage per yard | 324 ÷ depth | 108.0 sq ft per yard — 324 ÷ 3. |
| Area behind a target volume | target volume × 324 ÷ depth ÷ (1 + waste ÷ 100) | 6600 sq ft — 67.22 × 324 ÷ 3 ÷ 1.10, rounded. |
| Depth behind a target volume | area needed × depth ÷ 324, solved for depth | 3 inches — the depth that turns 7,260.00 sq ft into 67.22 yards. |
| Waste behind a target volume | target volume × 324 ÷ depth ÷ area − 1, as a percent | 10% — the allowance that turns 6600 sq ft into 7,260.00 sq ft. |
Three things to check before you trust the number
First, measure the bed honestly: length times width for each bed, added together, with L-shaped beds split into rectangles. A guessed area moves the order by the same percentage as the guess. Second, keep the depth honest: limestone does not break down, so the layer you spread is the layer that stays — but the chips scatter onto paths and lawns when raked or walked on, so edge the bed if you want the depth to hold. Third, do not skip the waste allowance on limestone: the pieces are angular and heavy, so they stay put better than round gravel on slopes, but spillage at the edges and uneven ground still eat into the load, so the 10% allowance is the difference between finishing the bed and running short with the truck already gone. The headline order of 68 yards carries 0.78 yards of headroom, which covers ordinary spillage on a bed like this one.
Worked example
Area 6600 sq ft, depth 3 inches, waste 10%. Area needed: 6600 × 1.10 = 7,260.00 sq ft. Exact volume: 7,260.00 × 3 ÷ 324 = 67.22 cubic yards. Order: round 67.22 up to 68 cubic yards. Drop the waste to 0% and the exact volume falls to 61.11 yards, order 58; raise the waste to 5% and it is 64.17 yards, order 61; raise it to 15% and it is 70.28 yards, order 67. Drop the depth to 2 inches and it falls to 44.81 yards, order 43; raise it to 4 inches and it climbs to 89.63 yards, order 85. Depth moves the answer faster than waste does, because every inch adds a full layer across the whole bed.
Limestone mulch lookup table
Every row below applies 10% waste to the area first, then divides by 324: yards = area needed × depth ÷ 324, rounded up to the next whole yard for the order. Find your bed size and depth, read across, and order the last column.
| Area (sq ft) | Depth (inches) | Area needed (sq ft, 10% waste) | Exact (cubic yards) | Order |
|---|---|---|---|---|
| 250 | 2 | 275.00 | 1.70 | 2 cubic yards |
| 250 | 3 | 275.00 | 2.55 | 3 cubic yards |
| 500 | 2 | 550.00 | 3.40 | 4 cubic yards |
| 500 | 3 | 550.00 | 5.09 | 6 cubic yards |
| 750 | 3 | 825.00 | 7.64 | 8 cubic yards |
| 750 | 4 | 825.00 | 10.19 | 11 cubic yards |
| 1000 | 2 | 1,100.00 | 6.79 | 7 cubic yards |
| 1000 | 3 | 1,100.00 | 10.19 | 11 cubic yards |
| 1200 | 2 | 1,320.00 | 8.15 | 9 cubic yards |
| 1400 | 3 | 1,540.00 | 14.26 | 15 cubic yards |
| 1500 | 3 | 1,650.00 | 15.28 | 16 cubic yards |
| 1500 | 4 | 1,650.00 | 20.37 | 21 cubic yards |
| 1750 | 2 | 1,925.00 | 11.88 | 12 cubic yards |
| 2000 | 3 | 2,200.00 | 20.37 | 21 cubic yards |
| 2500 | 3 | 2,750.00 | 25.46 | 26 cubic yards |
| 3000 | 2 | 3,300.00 | 20.37 | 21 cubic yards |
Every branch, checked
A 6600 square foot bed at 3-inch depth with 0% waste gives 61.11 cubic yards exact, order 62 cubic yards. The same bed at 2-inch depth with 10% waste gives 44.81 cubic yards exact, order 45 cubic yards. A 6300 square foot bed at 3-inch depth with 10% waste gives 64.17 cubic yards exact, order 65 cubic yards. A 6900 square foot bed at 3-inch depth with 10% waste gives 70.28 cubic yards exact, order 71 cubic yards. Each branch changes exactly one input, so the difference from 67.22 isolates that input.
The reverses, worked backwards
The area behind 67.22 cubic yards is 6600 sq ft: at 6300 sq ft the figures are 64.17 cubic yards exact, order 65 cubic yards, and at 6900 sq ft they are 70.28 cubic yards exact, order 71 cubic yards. The depth behind 67.22 cubic yards is 3 inches: at 2 inches the figures are 44.81 cubic yards exact, order 45 cubic yards, and at 4 inches they are 89.63 cubic yards exact, order 90 cubic yards — one inch either way moves the order by about 20.4 yards. The waste behind 67.22 cubic yards is 10%: at 5% the figures are 64.17 cubic yards exact, order 65 cubic yards, and at 15% they are 70.28 cubic yards exact, order 71 cubic yards — waste moves the exact volume, and at 15% it lifts the order to 62 yards.
What the defaults assume
The defaults assume a flat 6600 square foot bed, a uniform 3-inch layer, and a 10% waste allowance. Real limestone beds are rarely flat: slopes shed pieces downhill, paths and tree trunks eat into the area, and loose pieces wander into the lawn, so measure the planted area only and keep the waste allowance on sloped ground. Zero square feet is the honest edge: 0.00 cubic yards exact, order 0. A depth of zero or below, a negative area, or a negative waste allowance is rejected, because none of them describes a real bed.
Who uses this
A gardener dressing beds with limestone: the 6600 square foot headline is a large garden bed, and the table covers everything from a 250 square foot border to a 3000 square foot yard. A landscaper quoting a limestone job: the waste column protects the quote, and the order column is the number given to the supplier. A homesteader spreading bulk limestone on paths: the 3-inch rows are the bed depths, and the 2-inch rows are the path depths. A community garden coordinator splitting a bulk delivery: each plot reads its own row, and the orders add up to the truckload.
Accuracy & limitations
The arithmetic is exact for the inputs entered; the judgement is in the inputs. A guessed area, a depth measured before the pieces scatter, or a skipped waste allowance will each move the answer by exactly the amount of the error, every load. The model does not include chips scattering into lawns, delivery minimums, or compaction — a supplier may sell only in whole yards or charge extra below a minimum, so confirm the order quantity with the supplier. This page is a calculation tool, not landscaping advice.
Cite this calculator
Limestone mulch 6600 sq ft at 3-inch depth with 10% waste needs 7,260.00 sq ft, 67.22 cubic yards exact, order 68 yards. Free calculator, plus 16-row table. Source: Bright Side Kit, https://brightoolbox.com/limestone-mulch-chart/, accessed 31 October 2026 (2026-10-31).
Frequently asked questions
Why does the table apply waste to the area first?
Because waste is lost cover: spillage, scattering and uneven ground mean you need more covered area than the bed measures. Adding 10% to the area, then converting to yards, keeps the waste in the same units as the bed. Applying it after the conversion gives the same number here, but the area-first order keeps the table readable.
How deep should limestone mulch really be?
Three inches is the standard bed layer on this page, and 2 inches suit paths and top-ups. Limestone does not break down, so a 3-inch spread stays 3 inches; if pieces shift or chips scatter, rake them back or top up the thin spots.
Does limestone mulch introduce weed seeds?
Limestone is mineral, so it carries no weed seeds at all; weeds can still root in the dust and debris that collects on top of it, so use fabric underneath and clear the debris. This calculator prices volume only and does not judge the gardening choice.
What if my bed is not a rectangle?
Split it into rectangles, measure each, and add the areas before entering the total. A circle uses radius times radius times 3.14. Guessing one number for an irregular bed is the most common reason orders come up short.
Why order 68 yards when the exact figure is 67.22?
Because mulch is sold by the whole yard, and 67.22 rounds up to 68 — the order carries 0.78 yards of headroom for spillage and uneven ground. That headroom is the buffer the exact figure does not have.
Can I use this chart for other mulch types?
The volume math is the same for any loose mulch — area, depth and waste convert the same way — but settling and coverage differ by material. Limestone does not settle like bark, so use the limestone rows for limestone and the matching chart for bark or wood chips.