Gravel Calculator
Enter values and click calculate.
Use this gravel calculator to estimate gravel volume and weight from area dimensions, depth, and density.
What This Calculator Does
This calculator multiplies length, width, and depth to get volume, then estimates tonnage using density. It is useful for driveways, pads, drainage, and paths.
How to Use
- Enter length and width.
- Enter depth.
- Check the density value.
- Click calculate.
Example
If an area is 12m by 3m at 75mm depth with a density of 1.6 tonnes per cubic metre, the calculator estimates both volume and weight.
Why This Calculation Matters
Bulk materials are much easier to order when you can see both cubic metres and tonnes. It helps with supplier orders, transport, and job costing.
Common Mistakes
- Mixing millimetres and metres for depth.
- Using the wrong density.
- Not checking whether the final level already includes compaction.
- Ignoring waste and site variation.
FAQs
Why does the calculator show tonnes too?
Many suppliers sell gravel by weight, not only by volume.
Does density matter?
Yes. Different materials weigh different amounts per cubic metre.
Can I use this for crusher dust or road base?
Yes, as long as you use a realistic density for the material.