Gravel Calculator
Estimate gravel volume, tons or kilograms, bag counts, waste, and optional cost
Imperial mode uses feet, inches, cubic yards, tons, and pounds.
Choose a common density preset.
Material weight per cubic volume.
Long side of the gravel area.
Short side of the gravel area.
Distance across the round gravel area.
Use this when the area is already measured.
Planned gravel layer thickness.
Extra for uneven ground and spreading.
Weight printed on one bag.
Optional cost for one bag.
Optional supplier price per cubic volume.
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How This Gravel Calculator Works
Area and depth determine volume; density converts that volume into weight.
Measure the area
Use rectangle mode for straight spaces, circle mode for round beds, or known area when a drawing already gives square feet or square meters.
Convert depth to volume
Depth is converted to feet or meters before multiplying by area. The result is shown as cubic yards or cubic meters.
Plan by weight
Density turns volume into tons, pounds, kilograms, and bag counts so bulk quotes and bag purchases can be compared.
Gravel Calculator Examples
Reference estimates for common landscaping and driveway planning.
3 inches deep with 10% waste and crushed stone is about 2.85 tons.
7.5 cm deep with 10% waste and crushed stone is about 4,111 kg.
Add both bag price and bulk price to see which buying method is more practical.
Gravel Calculator FAQ
Practical notes for gravel depth, density, waste, and ordering.
How much gravel depth should I use?
Many walkways and decorative beds use about 2 to 3 inches. Driveways, drainage areas, and base layers often need more depth and may require compacted layers.
Why does the calculator ask for gravel density?
Gravel is usually purchased by volume or weight, and density changes by rock type, moisture, and compaction. The preset gives a planning estimate, but supplier weights are more exact.
Should I order by bags, cubic yards, or tons?
Small projects are often easiest by bag. Larger projects are usually cheaper by bulk cubic yards, cubic meters, or tons from a landscape supplier.
What waste allowance should I add?
Use 5% to 10% for simple areas. Increase the allowance when the base is uneven, the shape is irregular, the edge is hard to measure, or delivery material may be lost during spreading.
Is this the same as a mulch calculator?
No. Gravel planning needs both volume and weight because bulk stone is often quoted by tons or kilograms. Mulch is usually planned mainly by volume.