Stabilized Sand

The stabilized sand calculator estimates the volume of stabilised sand (sand mixed with cement) plus the cement and sand you need as a bedding layer for paving, kerbs and outdoor slabs.

Common use cases

• Bedding layer for paving stones
• Foundation for kerbs and edging
• Base under driveways and paths
• Levelling layer for outdoor tiles

How to use this calculator

1. Enter the area length and width.
2. Enter the layer thickness (typically 5–10 cm).
3. Press Calculate to see the volume of stabilised sand.
4. Use the cement and sand quantities for a 150 kg/m³ mix.

Example calculation

A 10 m × 3 m path (30 m²) with a 6 cm bedding layer needs 1.8 m³ of stabilised sand — roughly 270 kg of cement and 2,700 kg of sand at 150 kg/m³.

Frequently asked questions

What is stabilised sand used for?

It's a semi-dry mix of sand and cement used as a stable, free-draining bed under pavers, kerbs and outdoor slabs.

How much cement per m³ of stabilised sand?

Standard is 150 kg of cement per m³ of sand for paving beds; use 200 kg/m³ for heavier loads.

How thick should a stabilised sand bed be?

Typically 3–5 cm for pedestrian paving and 8–10 cm for driveways.

Does stabilised sand need water?

It's mixed semi-dry; once compacted it cures with ground moisture and rainfall.