Mulch Calculator for Bags and Bulk
From bed dimensions to bags or bulk, with every assumption shown.
Loading the tool…
How to use this page
Turn measured bed dimensions into a volume estimate, then compare bag quantities and bulk pricing. This calculator shows the base amount and your extra allowance separately so the shopping total is easy to check.
1. Measure each bed
Use length and width for rectangles or diameter for circles. Measure depth separately; do not confuse inches of depth with feet of length.
2. Add an allowance
The extra percentage is your choice, not a recommendation for every material. Compaction, settlement, moisture and uneven ground can change the amount needed.
3. Compare purchase options
Enter the volume printed on a bag and local prices if you know them. Bags round up to a whole bag; bulk orders need the supplier’s rounding and delivery rules.
Good to know
What does one cubic yard cover?
One cubic yard is 27 cubic feet. At 3 inches deep, that is 108 square feet before any extra allowance. Divide 27 by depth in feet to find coverage.
Does a bag count include waste?
The count includes only the extra percentage you enter. It rounds the adjusted volume up to the next whole bag. Keep the allowance at zero if you do not want extra material.
Can volume tell me the weight?
Only if you supply a suitable bulk density for that specific material and condition. Moisture and compaction change density. Ask the supplier before planning vehicle loads.
Keep going.
Topsoil Calculator
Topsoil is estimated by volume.
Open tool →Raised Bed Soil Calculator
Use the internal dimensions of the raised bed and the depth you plan to fill.
Open tool →Gravel Volume Calculator
Aggregate specifications and compacted depths vary.
Open tool →Mulch Bags vs Bulk Cost Guide
Compare the rounded number of bags with the bulk volume times the quoted unit price, plus delivery.
Open tool →Sand Volume Calculator
Sand volume changes with handling and moisture.
Open tool →