How is gravel volume calculated?

Volume = Length × Width × Depth for rectangular areas, or π × (Diameter / 2)² × Depth for circular areas. All dimensions must be in the same unit before multiplying.

How is gravel weight calculated?

Weight = Volume × Density. Dry gravel density is typically 1,520–1,680 kg/m³ (95–105 lb/ft³). The exact density varies by gravel type and moisture content; this calculator uses standard industry averages.

How many tons of gravel do I need?

Divide the total weight in pounds by 2,000 for short tons. For example, 10,000 lb ÷ 2,000 = 5 short tons. Metric tons are calculated by dividing kilograms by 1,000.

What depth of gravel should I use?

For driveways, 4 inches (10 cm) is a common minimum. For pathways and decorative beds, 2–3 inches (5–8 cm) is typical. For drainage and base layers, 6–12 inches (15–30 cm) may be required.

Why should I add a waste factor?

Gravel settles over time and some is lost during spreading and compaction. Adding 5–10% to your calculated amount ensures you will not run short mid-project.

Does gravel type affect the calculation?

Yes. Different gravel types have different densities. Pea gravel is lighter (~1,500 kg/m³) while crushed limestone is heavier (~1,680 kg/m³). Selecting the correct type gives a more accurate weight estimate.

Gravel Calculator

Name: Gravel Calculator
Availability: InStock
Author: Nham Vu

Calculate the volume and weight of gravel needed for any rectangular, circular, or irregular area and depth.

Area & Depth

Length (ft)

Width (ft)

Depth (in)

Waste Factor (%)

Gravel Type

Summary