Mulch, Soil, and Gravel Calculator
Calculate material volume and bag count from area, layer depth, settling allowance, and your package size.
Turn area and layer depth into volume
Area and volume are different: layer depth turns square units into a material quantity. The calculator converts your measurements to cubic meters, liters, and cubic yards while separating geometric base volume from allowances.
Plan bulk and bagged material
- Select metric or imperial measurements.
- Enter the area and intended layer depth.
- Select the material and add a reserve if needed.
- Enter the liters printed on one bag so the package count matches your product.
Example: a bed covered with bark mulch
An area of 20 m² at a depth of 10 cm has a base volume of 2 m³. With the bark-mulch settling allowance, the plan becomes 2.4 m³ or 2,400 liters. At 50 liters per bag, that is 48 bags.
Allow for the base and compaction
The calculator cannot see uneven ground, moisture, particle size, or delivery density. Measure separate sections, subtract exclusions, and use the reserve for an explicit allowance. For bulk products, compare the calculated volume directly with the supplier’s quote.