Gravel Calculator
Buy Gravel at Home Depot →How this calculator works
Gravel is sold by weight (tons), but you measure your project by volume. This calculator bridges the two: it multiplies your length, width, and depth into cubic yards, then applies gravel’s typical density of 1.4 tons per cubic yard to get the tons you need to order.
Formula: Cubic yards = (Length ft × Width ft × Depth ft) ÷ 27. Tons = Cubic yards × 1.4.
Worked example
A 20 ft × 10 ft driveway patch at a 4-inch depth:
- Depth in feet: 4 ÷ 12 = 0.333 ft
- Cubic yards: (20 × 10 × 0.333) ÷ 27 = 2.47 yd³
- Tons: 2.47 × 1.4 = 3.46 tons
- At $50/ton, that’s $172.84 before waste.
Coverage reference
| Depth | Coverage per ton |
|---|---|
| 2 in | ~116 sq ft |
| 4 in | ~58 sq ft |
| 6 in | ~39 sq ft |
How to measure your area
Measure the longest length and widest width of the area in feet. For irregular shapes, break the area into rectangles, calculate each separately, and add the results together.
Frequently asked questions
How much gravel do I need for a driveway?
Most driveways use a 4-6 inch base depth. Measure the length and width in feet, enter a 4-6 inch depth, and the calculator converts that to cubic yards and tons automatically.
How many tons of gravel are in a cubic yard?
About 1.4 tons, since gravel weighs roughly 2,800 lbs per cubic yard. This calculator uses that ratio to convert your cubic yardage into tons.
Should I add extra gravel for waste?
Yes — check the waste toggle to add 10%, which covers spillage, compaction settling, and uneven sub-grade. Most contractors build this in by default.
What depth of gravel should I use?
Walkways and light-use paths: 2 inches. Driveways: 4-6 inches. Base layers under pavers or concrete: 4-8 inches, depending on soil conditions.
Estimates only. Verify quantities with your supplier before purchasing.