Gravel Calculator

Use this tool to calculate how much stone you need for your new gravel driveway.

Follow this simple step-by-step process to determine the exact quantity of stone:

  1. Measure the length and width of each area in meters.
  2. Determine the average depth of stone.
  3. Choose your preferred gravel size.
  4. Use this gravel calculator to get exact quantities of stone.

Calculate how much stone to order for your driveway, parking space or pathway. Our calculator will help you order the exact amount.

It takes into account how wide, long and deep your new surface is. If you're using IBRAN-X grids to contain your stone, choose either a 40mm depth or 50mm depth. This is depending on whether you wish to hide or see the grids.

Depth:  40mm (Flush)
Stone Size:  10mm
Quantity:  62.4kg

How to calculate how much gravel you need

Typically you would need between 15kg-20kg of 10-30mm gravel per IBRAN-X gravel grid. This is roughly one bulk bag of stone for every 10m2 based on a depth of 50mm.

This gravel estimator allows you to calculate how much pea gravel or other type of stone you need. It uses the dimensions and the approximate density of your chosen stone.

The formula for this is:
Length (m) x Width (m) x Depth (m) x Density (kg/m3)

Our calculations are based on the following approximated stone densities:

Size Density
10mm Gravel 1478kg/m3
20mm Gravel 1560kg/m3
30mm Gravel 1700kg/m3
40mm Gravel 1700kg/m3