MATERIAL AND PROJECT ESTIMATES
Estimate cubic yards of mulch from bed length, width, depth, and an allowance you choose.
Your result
Enter your values and select Calculate. Your result stays on this device.
Cubic yards = length ft × width ft × (depth in ÷ 12) ÷ 27, plus the entered allowance.
A rectangular bed with uniform depth; settling, compaction, irregular borders, and bag size are not modeled.
This mulch calculator uses U.S. landscape units and keeps the selected depth visible. It is best for a rectangular bed; irregular sections can be calculated separately and added.
Use case
Calculate landscape volume from bed length, width, depth, and an explicit extra allowance, then compare the result with the units and quantities sold by the supplier.
Estimate cubic yards of mulch for a rectangular bed from its dimensions and chosen depth.
Build a reliable scenario
Mulch Calculator helps you check a specific home projects question with figures that apply to you. Estimate cubic yards of mulch from bed length, width, depth, and an allowance you choose. Calculate landscape volume from bed length, width, depth, and an explicit extra allowance, then compare the result with the units and quantities sold by the supplier. Estimate cubic yards of mulch for a rectangular bed from its dimensions and chosen depth. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
Prepare Bed length, Bed width, Mulch depth and Extra allowance. Measure the bed length and width in feet. Choose the intended mulch depth in inches. Add an allowance for borders or measurement uncertainty. Compare cubic yards with the bulk or bag quantity sold by your supplier. Keep units, dates, currency, and time periods consistent.
The stated method is: Cubic yards = length ft × width ft × (depth in ÷ 12) ÷ 27, plus the entered allowance. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
A rectangular bed with uniform depth; settling, compaction, irregular borders, and bag size are not modeled. Check the input and rounding, then calculate again.
Method and update
Last reviewed: 2026-08-10. This tool performs the stated formula locally in your browser using the values you enter.
One cubic yard equals 27 cubic feet.
Split it into smaller measurable shapes and add their volumes.
Only through the extra allowance you enter; actual settling varies by material.
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