Construction calculator
Compost Calculator
Estimate compost volume for garden beds, lawn top dressing, raised beds, and soil improvement projects.
Material estimate
Compost Calculator
Compost is often spread in a thin layer over beds or lawns, then mixed into the soil when needed.
Selected bag
1 cu ft
1 cu ft bag
Estimated material needed
0.679 cu yd
Includes 10% extra. Base estimate is 0.617 cu yd.
Base cubic feet
16.67 cu ft
Before extra allowance
With extra
18.33 cu ft
Used for bag count
Estimated bags
19
At 1 cu ft per bag
Common Tools Used for Material Estimates
Material calculators need area, depth, and sometimes package size before estimating volume or bag count.
Measure the project area, choose the planned depth, then add extra allowance for settling, compaction, and uneven ground.
Formula
Bag count is estimated by converting cubic yards to cubic feet, applying extra allowance, then dividing by the bag size.
Common Examples
| Area | Depth | Base volume |
|---|---|---|
| 100 sq ft | 1 in | 0.309 cu yd |
| 100 sq ft | 2 in | 0.617 cu yd |
| 250 sq ft | 2 in | 1.543 cu yd |
| 500 sq ft | 1 in | 1.543 cu yd |