Free Gravel Calculator Online
Gravel cubic yards and tons for driveways, paths and drainage
The Gravel Calculator estimates the volume and weight of gravel, crushed stone, or decorative aggregate needed to cover a defined area at a specific depth, expressed in cubic yards, cubic metres, and tonnes. Homeowners planning driveways and landscapers estimating decorative paths use it to order accurately from bulk suppliers and avoid multiple partial deliveries.
Frequently Asked Questions
About the Gravel Calculator
Gravel and crushed stone are bulk materials sold by the tonne or cubic yard, but laid out in dimensions of metres and millimetres. The gap between ordering unit and laying unit causes most estimation errors — especially because gravel's bulk density varies significantly between rock types. Pea gravel sits at about 1,400 kg/m³, while crushed granite runs closer to 1,680 kg/m³.
This calculator accounts for the selected material's density and a configurable compaction factor — typically 10% extra for gravel that will be driven over or tamped down. It outputs both the volume (for truck capacity planning) and the weight (for supplier ordering) simultaneously.
For driveway projects, pair this with the Asphalt Calculator if you're deciding between gravel and asphalt surfaces. For drainage layers and soakaway fills, the depth is usually specified by a civil engineer or building code; enter that depth directly and scale the area to your dimensions.
When Should You Use This?
The Gravel Calculator is ideally suited for contractors, builders, architects, and DIY enthusiasts who need to perform quick, accurate calculations related to general calculations. Use this tool when you need to verify figures, compare different scenarios, or get a precise answer without manual computation errors.
What Does The Result Mean?
The calculated output provides an instant, accurate resolution to your input parameters. You can use these results directly for your planning, assignments, or professional tasks, knowing they are based on standardized formulas.
Example Calculation
Gravel needed for a 10 m × 3 m driveway at 75 mm depth
📥 Inputs
- Length: 10 m
- Width: 3 m
- Depth: 0.075 m (75 mm)
🔢 Calculation Steps
- 1Volume = 10 × 3 × 0.075 = 2.25 m³
- 2Add 10% for compaction losses: 2.25 × 1.10 = 2.475 m³
- 3Convert to cubic yards: 2.475 × 1.308 = 3.24 yd³
- 4Gravel density (crushed limestone) ≈ 1,520 kg/m³
- 5Weight = 2.475 × 1,520 = 3,762 kg ≈ 3.76 tonnes
Limitations of this Calculator
- Results are based purely on the mathematical relationship of the inputs provided.
- Does not account for edge cases or extreme outlier values that fall outside standard formula constraints.
- Calculated outputs should be double-checked against your specific real-world requirements before finalizing important decisions.
How to Use the Gravel Calculator
- 1Enter your values into the Gravel Calculator input fields above.
- 2Review the input labels to ensure you are using the correct units.
- 3Click the "Calculate" button to get your instant result.
- 4Use the step-by-step breakdown to understand how the result was calculated.
- 5Export or copy your result to use in reports or share with others.
Tips & Best Practices
- Double-check your input units before calculating — using the wrong unit is the most common source of errors.
- Bookmark this Gravel Calculator for quick access next time you need it.
- Use the share button to send your results to a colleague or save them for later reference.
Related Calculators
View all Construction Calculators →