Gravel Calculator
Quickly find your Gravel needed with our free Gravel Calculator. Simple, fast, and accurate.
Area & depth
Gravel needed
What is a Gravel Calculator?
The Gravel Calculator helps you calculate the volume and weight of gravel needed for driveways, paths, and landscaping. Just enter your numbers and the tool does the rest — no manual math, no guesswork.
How to calculate Gravel manually (the formula)
The specific formula depends on what you are calculating. The calculator applies the correct equation automatically, but understanding the formula helps you verify the results and adapt them to your own needs.
Example calculation
Enter your values into the calculator and it will produce an instant result. For a step-by-step walkthrough, try different inputs and observe how each one affects the outcome.
Common mistakes
- Mixing up depth units — Depth must be in feet or converted from inches. 3 inches = 0.25 feet. Forgetting to convert leads to over-ordering by 4×.
- Not accounting for compaction — Gravel settles 10–20% after compaction. Order extra or you will end up short.
- Using the wrong gravel type — Smooth river rock shifts under weight and is unsuitable for driveways. Use angular crushed stone.
Frequently asked questions
How much gravel do I need for a driveway?
Multiply length (ft) × width (ft) × depth (ft). A typical driveway uses 4–6 inches of gravel.
What depth of gravel should I use?
Use 2–3 inches for walkways, 4–6 inches for driveways, and 6–8 inches for foundations.
How much does a yard of gravel weigh?
One cubic yard of gravel typically weighs 2,400–2,900 lbs (1.2–1.45 tons), depending on the type and moisture.
How do I calculate gravel for a circular area?
Use π × radius² × depth. Measure the radius in feet and depth in feet, then multiply by π (3.14).
Should I compact the gravel?
Yes. Compact in 4-inch layers for driveways. Add 15% extra to account for compaction settling.
What type of gravel is best for drainage?
Crushed stone #6 or #57 with angular particles drains best. Round pea gravel compacts poorly.