MATERIAL AND PROJECT ESTIMATES
Mulch Calculator
Estimate cubic yards of mulch from bed length, width, depth, and an allowance you choose.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Cubic yards = length ft × width ft × (depth in ÷ 12) ÷ 27, plus the entered allowance.
Assumptions
A rectangular bed with uniform depth; settling, compaction, irregular borders, and bag size are not modeled.
About this calculator
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.
How to use it
- 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.
Use case
mulch calculator: a clear planning check
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.
Method and update
Last reviewed: 2026-08-10. This tool performs the stated formula locally in your browser using the values you enter.
Frequently asked questions
How many cubic feet are in a cubic yard of mulch?
One cubic yard equals 27 cubic feet.
What if my bed is not rectangular?
Split it into smaller measurable shapes and add their volumes.
Does the result include settling?
Only through the extra allowance you enter; actual settling varies by material.
Keep exploring