如何使用 Gravel Calculator — gravel do I need?
Convert an area and compacted depth into gravel volume and estimated mass using the selected bulk density.
Volume = area × depth in metres. Estimated mass = volume × bulk density, with any waste or compaction allowance applied once.
Convert an area and compacted depth into gravel volume and estimated mass using the selected bulk density. The linked Sellible tool keeps the fields, units and output together so the assumptions can be reviewed before the result is used.
- 1
Measure the finished coverage area.
- 2
Convert compacted depth from millimetres to metres.
- 3
Use the supplier density and round to its delivery increment.
Example values and result
These values demonstrate the method; replace them with measurements, rates or file details that match the real task.
- Area
- 40 m²
- Compacted depth
- 50 mm
- Volume
- 2.0 m³
- Example bulk density
- 1.7 t/m³
At the example density, the geometric mass is about 3.4 tonnes before the chosen allowance. Supplier bulk density and moisture can change delivered weight.
准确性和实用说明
- Distinguish loose delivery depth from compacted depth.
- Confirm whether the supplier sells by tonne, bag or cubic metre.
- Schedule membrane, edging and sub-base separately.
Common mistakes
- Entering 50 mm as 50 metres.
- Adding compaction twice.
- Using one density for every aggregate size and moisture condition.
A free account makes repeat tasks simpler
Email-link sign-in keeps file jobs, downloads, support and usage available across devices. Browser calculators remain free.
常见问题
Is Gravel Calculator free?
Yes. This calculator or browser utility is free and does not use processing credits.
Can I use this guide and Gravel Calculator on a phone?
Yes. The guide, inputs, results and calls to action are responsive and keyboard accessible on current phones, tablets and desktop browsers.
Should I order or make a decision from the estimate alone?
No. Distinguish loose delivery depth from compacted depth. Confirm whether the supplier sells by tonne, bag or cubic metre. The calculation is a planning aid rather than professional or regulatory approval.
How should I check the result?
Keep the source values and units visible, compare the result with supplier or project information, and retain enough precision until the final purchasing or reporting step.