Mulch & Soil Calculator
Calculate how much mulch, topsoil, or gravel you need for your landscaping project with bag and bulk estimates.
Mulch & Soil Calculator
Calculate how much mulch, soil, or gravel you need for your landscaping project
Formula
Volume = Area × DepthCalculate cubic feet/yards needed based on coverage area and desired depth
How to Use
- 1Select material type — Choose mulch, topsoil, or gravel based on your project needs.
- 2Choose area shape — Select rectangular for beds or circular for tree rings.
- 3Enter dimensions — Input the length, width (or diameter) of your area.
- 4Set desired depth — Enter how deep you want the material (typically 2-4 inches for mulch).
- 5View results — See cubic yards needed, bag counts, and weight estimates.
Frequently Asked Questions
How deep should mulch be?
2-3 inches is ideal for weed suppression and moisture retention. 3-4 inches provides better insulation for winter. Avoid more than 4 inches as it can suffocate plant roots.
Should I buy bags or bulk mulch?
For small projects under 3 cubic yards, bags are convenient. For larger areas, bulk delivery is more economical and easier to spread.
How much does mulch weigh?
Mulch weighs about 400-800 lbs per cubic yard depending on moisture content. Dry mulch is lighter; wet mulch can be significantly heavier.
How often should I replace mulch?
Most mulch should be refreshed annually. Add 1-2 inches each year to maintain proper depth as it decomposes.
What's the difference between topsoil and garden soil?
Topsoil is natural soil from the ground. Garden soil is topsoil amended with compost and nutrients, better for planting beds.