Gravel Calculator
Calculate the exact amount of gravel needed for driveways, paths, garden beds, or drainage layers. Get your order in tonnes and bulk bags so you don't run short or over-order.
Gravel Buying Guide
Depth Guide
Decorative garden path: 40–50mm. Driveway (pedestrian): 50mm. Driveway (cars): 75–100mm with a compacted sub-base. Drainage layer: 100–150mm. Under decking: 50mm for weed control and drainage.
Bulk Bags vs Mini Bags
Bulk bags (typically 0.85–1 tonne) are significantly cheaper per kg and better for areas over 20m². Mini bags (25kg) suit small top-ups and tight access areas. Most suppliers deliver bulk bags with a crane grab.
Sub-Base Matters
For driveways, a compacted MOT Type 1 sub-base of 100–150mm under the decorative gravel is essential — without it, cars will push the gravel down and create ruts within months. Don't skip this step.
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