Gravel Calculator
Estimate gravel volume and tons needed based on length, width, depth, and material density.
Calculate gravel needed
Enter the project dimensions and choose your depth unit. This calculator estimates cubic feet, cubic yards, and total tons of gravel needed.
3.46 tons
Based on a 20 ft by 10 ft area, 4 inches deep, with a density of 1.4 tons per cubic yard.
How to use this calculator
Enter the length and width of the area in feet. Then enter the depth and choose whether that depth is in inches or feet. Add your gravel density in tons per cubic yard. The calculator estimates the total volume and approximate tons needed.
Tips for success
- Most gravel depth measurements are entered in inches.
- Always round up slightly when ordering material.
- Compaction and settling can affect the final amount needed.
- Different gravel types can have different densities.
- Driveways often use more material than decorative paths.
Practical note
Common mistakes
- Entering inches as if they were feet.
- Using the wrong density for the gravel type.
- Not rounding up for delivery and compaction.
- Measuring an uneven area as if it were perfectly rectangular.
- Forgetting that deeper driveway bases need much more material.
FAQ
What gravel density should I use?
A rough general estimate is 1.4 tons per cubic yard, but it varies by gravel type and moisture content. Your supplier may provide a more exact number.
Should I round up when ordering?
Usually yes. Ordering a little extra helps account for compaction, uneven ground, and small measuring errors.
Can I use this for sand or stone dust?
Yes, but you should adjust the density value to better match the material you are using.
What if my area is not a perfect rectangle?
Break the area into smaller rectangles, calculate each one separately, and then add the results together.
Can I use feet for depth instead of inches?
Yes. This calculator supports either inches or feet for the depth input.