⭐ 0
🔍
Text Image PDF & Docs Audio Music Electronics Time Utilities Validators Esoteric Games

Compost Calculator — Cubic Yards, Weight & Bags

Calculate how much mulch, topsoil, compost or gravel you need from area and depth — cubic yards, cubic feet, estimated weight and bags to buy.

A typical mulch layer is 2-4 inches (5-10 cm) deep; topsoil and compost beds are often deeper.

Processing... 0%
Reading dimensions
Calculating volume
Done

Result

This page opens the calculator with compost preselected as the material: enter your area (directly, or as length × width) and how deep you plan to spread it, and get the volume in cubic yards and cubic feet, an estimated weight, and a bag count for standard 2 cubic foot bags.

Compost sits between mulch and topsoil in density — a typical bulk density of roughly 1,000-1,100 lb per cubic yard, heavier than fluffy bark mulch but noticeably lighter than screened topsoil. Finished compost varies a lot by moisture and how well it's broken down, so this figure is a typical starting point for planning a delivery or a truck load, not an exact scale weight.

The full calculator is right here, just preconfigured for compost — switch to mulch, topsoil or gravel at any time. Every result is computed locally in your browser from static figures, with no uploads and no account needed.

🛡️
Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Area from a direct square footage/metreage or from length × width, in feet or metres.
  • Depth entered in inches or centimetres, with a hint that a typical mulch layer is 2-4 inches deep.
  • Typical bulk density per material (mulch, topsoil, compost, gravel) used for an honest weight estimate, clearly labelled as an estimate.

Key Benefits

✓ One calculator covers mulch, topsoil, compost and gravel — pick the material and the same area × depth math gives you the right volume.
✓ Volume shown in cubic yards and cubic feet at once, plus an estimated weight and how many standard 2 cubic foot bags to buy.
✓ Works from a direct area or from length × width, in feet or metres, and depth in inches or centimetres — no manual unit conversion.

Use Cases

  • • Refreshing a flower bed and need to know how many bags of mulch to buy this weekend?
  • • Ordering bulk topsoil for a new lawn and need the delivery in cubic yards, not square feet?
  • • Planning a gravel path and want an honest weight estimate before you rent a trailer?
  • • Spreading compost over a vegetable bed and want to know if 2 inches is enough for the area?