Gravel Calculator
Free gravel, sand and mulch calculator. Enter area and depth to get cubic feet, cubic yards, tons and the number of bags you need — for any landscaping material.
About the Gravel Calculator
Our free gravel calculator works out exactly how much gravel, sand, mulch, river rock or topsoil you need for a driveway, path, garden bed, french drain or playground. Enter the length and width of the area in feet and the depth in inches, choose your material, and the tool returns the volume in cubic feet and cubic yards, the estimated weight in tons (using each material’s density), and the number of bags to pick up. An adjustable waste margin lets you round up safely. All calculations happen instantly in your browser — ideal for landscapers, gardeners and homeowners planning a materials run.
Features
- Works for gravel, sand, mulch, river rock and topsoil
- Returns cubic feet, cubic yards, estimated tons and bag count
- Material-aware density for accurate ton estimates
- Adjustable waste percentage so you order a safe margin
- Great for driveways, paths, garden beds, french drains and play areas
- 100% client-side and private — instant results, no signup
How to use this tool
The Gravel Calculator works right in your browser — no signup, no installation. Follow these steps:
- Measure the length and width of your area in feet.
- Enter the desired depth in inches (e.g. 2–3 for mulch, 4–6 for a driveway base).
- Pick your material — gravel, sand, mulch, river rock or topsoil.
- Read off the cubic yards, tons and bags to order.
Frequently asked questions
How do I calculate how much gravel I need?
Multiply length × width × depth to get cubic feet, then divide by 27 for cubic yards. For tons, multiply cubic yards by about 1.4 (gravel’s typical density). This calculator handles every material’s density automatically.
How deep should gravel be for a driveway?
A gravel driveway typically needs a compacted depth of 4–6 inches for the base layer. For pathways and decorative beds, 2–3 inches is usually enough. Enter your chosen depth and the calculator sizes the order.
How many cubic yards are in a ton of gravel?
Because gravel weighs roughly 1.4 tons per cubic yard, one ton is about 0.7 cubic yards. The calculator shows both yards and tons so you can order whichever your supplier quotes.
How many bags of mulch equal a cubic yard?
A standard 2 cubic foot bag of mulch means you need 13.5 bags per cubic yard (27 ÷ 2). This calculator converts straight to bags for the material you choose.
Is this gravel calculator free?
Yes, completely free with no signup. Every estimate runs in your browser, so nothing is uploaded or tracked.
Using the results
The Gravel Calculator estimates quantities from your measurements and the stated assumptions. Check dimensions, product coverage and project requirements before buying materials.