Jointing Sand Calculator
Calculate kiln-dried or polymeric jointing sand for paving joints.
How We Calculate This
This calculator estimates jointing sand based on the paved area, joint width, joint depth and sand type.
Coverage rate
kg/m² = (jointWidth / slabPitch) × jointDepth × sandDensity. Wider joints and deeper joints need more sand. Polymeric sand is denser than kiln-dried.
Sand types
- Kiln-dried: Fine, dry sand swept into joints. Cheapest option but can wash out.
- Polymeric: Hardens when wetted. Prevents weed growth. More expensive but long-lasting.
- Silver sand: Very fine grade. Good for narrow joints under 3mm.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.