Concrete, Gravel & Mulch Calculator

About 8 bags. Dry volume is 1.54 m³; cement is 1/5.5 of that (0.28 m³ × 1,440 kg/m³ ≈ 403 kg).

About 45. Each 80 lb bag yields 0.6 ft³ and a cubic yard is 27 ft³.

Around 15% for gravel and crushed stone, which settle when tamped. The calculator adds it automatically.

Multiply the length × width × depth to get the volume, then convert to cubic yards (1 yd³ = 27 ft³). This tool does the math and also estimates the number of bags, for example, an 80 lb bag of concrete yields about 0.6 ft³.

It depends on the material's density. Gravel is roughly 1.4 tons per cubic yard, topsoil about 1.1, and sand about 1.3. This calculator applies typical densities to estimate weight in tons from your volume.

Mulch is usually applied 2-3 inches deep for garden beds; gravel driveways often need 4-6 inches. Enter your chosen depth and the tool converts everything to the volume and bags you need.

They are close estimates using standard densities and should be treated as a guide. Order about 5-10% extra to account for compaction and waste, and confirm bag yields with your supplier.

Measure length, width and depth in feet, multiply them and divide by 27 to get cubic yards. Enter your dimensions and the calculator does this for concrete, gravel, mulch, sand or topsoil.

Roughly: concrete ~4,050 lb, gravel ~2,700 lb, topsoil ~2,200 lb and mulch ~800 lb per cubic yard. The calculator can convert your cubic yards to tons using these values.

Enter the driveway's length, width and desired depth; the tool returns the cubic yards (and tons) of gravel to order, so you buy the right amount.