Stone Calculator
Calculate how much crushed stone or decorative stone you need by area and depth. Get cubic yards and estimated tons.
Results
- Volume needed
- 1.85 cu yd
- With 10% waste
- 2.04 cu yd
- Cubic feet
- 50 cu ft
- Cubic meters
- 1.42 m³
- Estimated weight
- 3.06 tons
Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.
Calculate how much crushed stone or decorative stone you need by area and depth. Get cubic yards and estimated tons.
How to use the stone calculator
- Enter the shape.
- Enter the length in ft.
- Enter the width in ft.
- Enter the depth in in.
- Enter the waste factor in %.
- Optionally add a price to estimate the total project cost.
- Read your quantities instantly — no sign-up, and you can print the estimate to take to the supplier.
Worked example
Inputs
- Shape
- Rectangle / Square
- Length
- 20 ft
- Width
- 10 ft
- Depth
- 3 in
- Waste factor
- 10 %
Results
- Volume needed
- 1.85 cu yd
- With 10% waste
- 2.04 cu yd
- Cubic feet
- 50 cu ft
- Cubic meters
- 1.42 m³
- Estimated weight
- 3.06 tons
Using the example values above, the stone calculator returns 1.85 cu yd (volume needed). Change any field to match your own project and the numbers update instantly.
How much extra should I order?
Always order a little extra. A 5% waste factor suits simple, square projects; 10% is right for most jobs; bump it to 15–20% for irregular shapes, diagonal patterns, or uneven ground. Running short almost always costs more than the leftover material.
Formula
Volume (cu ft) = area × depth ÷ 12. Cubic yards = cu ft ÷ 27. Waste-adjusted = volume × (1 + waste%).
Frequently asked questions
- How many tons of stone do I need?
- Multiply cubic yards by about 1.5 to estimate tons of crushed stone.
- What depth of stone should I use?
- Use 2–3 inches for decorative beds and 4 inches or more for driveways.
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