Garden & Landscaping calculator
Gravel Driveway Calculator
Estimate driveway aggregate volume and tonnage from length, width, layer depth, bulk density and an extra allowance.
Estimate driveway aggregate volume and tonnage from length, width, layer depth, bulk density and an extra allowance. This estimate is most useful when the inputs reflect the job as it will actually be built, fitted or coated. Give particular attention to compaction and aggregate density. Driveway aggregate is usually compacted in layers. Supplier tonnage and compaction factors are more useful than loose decorative-gravel densities.
What you need to enter
The Gravel Driveway Calculator uses the following project information to calculate the result.
- Length
- Width
- Depth
- Material density
- Extra allowance (%)
Calculator result
Volume and estimated weight
How the Gravel Driveway Calculator works
For gravel or aggregate volume and tonnage for a driveway layer, the calculator uses volume = L×W×D; mass = volume×density. The mathematics is only one part of the estimate: getting compaction and aggregate density right usually matters more to the real-world result than extra decimal places. Unit conversion happens before the calculation.
Gravel Driveway Calculator worked example
Gravel Driveway Calculator example: For a 10 m × 3 m area at 50 mm depth, volume is 1.50 m³. If the selected gravel driveway material has a bulk density of 1.6 t/m³, that is about 2.4 tonnes before the chosen allowance. Use the numerical result as the starting point, then verify compaction and aggregate density against the material, layout or equipment actually being used.
Important calculation assumptions
For gravel or aggregate volume and tonnage for a driveway layer, driveway aggregate is usually compacted in layers. Supplier tonnage and compaction factors are more useful than loose decorative-gravel densities.
Frequently asked questions
Which starting measurements make the Gravel Driveway Calculator more reliable?
The quality of the result starts with the inputs. Measure length, width and finished layer depth. Use a density that matches the material in the condition it will be supplied or compacted. They are used here to estimate gravel or aggregate volume and tonnage for a driveway layer.
How sensitive is the Gravel Driveway Calculator result to compaction and aggregate density?
A sensible Gravel Driveway Calculator result depends on getting compaction and aggregate density right. Driveway aggregate is usually compacted in layers. Supplier tonnage and compaction factors are more useful than loose decorative-gravel densities.
How should I round the Gravel Driveway Calculator result for purchasing?
For the Gravel Driveway Calculator, use the supplier's density and selling unit to convert the volume into a practical order. Loose, compacted and wet material can differ substantially in weight. This keeps the estimate connected to the actual product, site or design.