Gravel Calculator
Calculate gravel volume, weight, bulk units, and optional whole bags.
What this calculator does
Multiply length by width by compacted depth to find gravel volume. This calculator converts that volume to cubic yards and cubic meters, then uses the density you enter to estimate weight and tons.
Gravel volume and weight
Depth is finished compacted depth. Confirm the supplier density for a reliable weight estimate.
Your plan updates instantly
Drag with a mouse or finger. Pinch or scroll to zoom.
Compacted volume is multiplied by entered density. Optional costs use the selected weight or volume selling unit.
The arithmetic uses the exact values shown above. Verify field measurements, product pack sizes, layout constraints, and local requirements before ordering or building.
How to interpret the result
Volume determines space filled; weight determines a mass-based order. Because gravel type, grading, moisture, and compaction change bulk density, use a supplier-provided density whenever possible.
How the result is calculated
Volume = length x width x depth x (1 + extra %).
Worked example
A 20 x 10 ft area at 4 in deep contains about 2.72 yd3 at 10% extra.
How to use this calculator
- Measure the area length and average width.
- Enter the finished compacted depth, not loose delivery depth.
- Confirm bulk density with the supplier for the selected aggregate.
- Add an allowance only for known grading, settlement, or handling needs.
- Use the displayed volume and weight to confirm the supplier's selling unit.
Supported units
Imperial inputs use feet, inches, pounds per cubic foot, cubic feet, cubic yards, pounds, and short tons. Metric inputs use meters, millimeters, kilograms per cubic meter, cubic meters, kilograms, and tonnes.
Reference table
| From | To | Multiply by |
|---|---|---|
| cubic feet | cubic yards | 0.037037 |
| cubic yards | cubic feet | 27 |
| cubic meters | cubic yards | 1.30795 |
| short tons | pounds | 2,000 |
Practical guidance
- Measure the project at least twice before ordering.
- Use actual product dimensions and package coverage.
- Keep a saved or printed copy of the inputs used for the estimate.
Assumptions and limitations
Density, compaction, moisture, settlement, and irregular excavation change delivered quantities.
Methodology
All dimensions are normalized to meters. Volume equals length × width × depth × allowance. Estimated mass equals volume × entered bulk density.
Read the complete calculation methodology and testing policy.
Sources and technical references
References support terminology, units, or practical constraints. They do not imply endorsement or project approval.
- NIST Special Publication 811 — Guide for the Use of the International System of UnitsReference for SI units, symbols, and conversion-factor practice.
- U.S. Geological Survey — Unconsolidated material density dataIllustrates why bulk density varies across unconsolidated materials and conditions; supplier data should control an order.
Frequently asked questions
Are results rounded for purchasing?
Countable materials and packages are rounded up. Measured area, length, volume, and cost remain decimal values where appropriate.
Is this a final construction specification?
No. It is a transparent planning estimate. Verify product instructions, site conditions, plans, and local requirements.