How is this calculated?

Using standard material quantities and coverage rates for UK garden projects.

Should I add extra for wastage?

Yes, 5-10% extra is recommended for cuts and spillage.

Where can I buy materials?

Most garden centres, builders merchants, and online suppliers stock these materials.

What is the difference between resin-bound and resin-bonded?

Resin-bound: aggregate is mixed with resin and trowelled smooth, giving a permeable, flat surface. Resin-bonded: resin is applied to the surface and aggregate scattered on top, giving a textured finish.

Is resin-bound paving permeable?

Yes, resin-bound surfaces are fully permeable (SuDS compliant) when laid correctly over a porous base. This means no planning permission needed for front drives in most cases.

GardenCalcs

Resin Bound Gravel Calculator

Calculate resin and aggregate quantities for resin-bound surfaces.

Area

Total surface area to be covered with resin-bound gravel

Depth

Finished depth — 15mm for pedestrian, 18-20mm for driveways

Aggregate SizeFiner aggregates give a smoother finish but use more resin per kg

How We Calculate This

This calculator estimates resin, aggregate and primer quantities for resin-bound surfaces.

Aggregate

Aggregate (kg) = Area × Depth × Density. Standard aggregate density is 1,700 kg/m³. Adjust for your specific stone.

Resin

Resin (kg) = Aggregate × Resin ratio. Standard ratio is 7-9% resin by weight. Finer aggregates need more resin (higher surface area).

Primer

A resin primer coat is applied to the prepared base before laying. Typically 0.15-0.2 litres per m².

Frequently Asked Questions

Related Calculators

Paving Slab Calculator

Calculate how many paving slabs you need for a patio or path.

Gravel Calculator

Work out gravel quantities in tonnes or bulk bags for drives and paths.

Patio Area Calculator

Calculate patio area and materials for rectangular or L-shaped patios.

Stepping Stone Calculator

Work out stepping stone quantities and spacing for garden paths.

Block Paving Calculator

Calculate block paving quantities with wastage allowance.

Last updated: February 2026

All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.