Artificial Grass Sub Base Calculator
Calculate MOT Type 1, sharp sand or grano dust, weed membrane and fixing pins for an artificial grass base. Get bulk bag counts for all materials in one place.
Enter your dimensions
Standard domestic installation: 75mm. For poor ground, use 100mm.
Typical: 20–25mm screeded layer on top of MOT
Covers cuts, breakages and uneven ground. 10% is a typical starting point.
Weed membrane
Typical: 3 pins per m² for membrane and edging
Advanced: override densities (optional)
Default 2.0 t/m³
Default 1.6 t/m³
Default 1.8 t/m³
Default 850kg
Sub base estimate
Enter length and width to see your artificial grass sub base estimate
Standard artificial grass base layers
| Layer | Depth | Notes |
|---|---|---|
| Existing ground | — | Remove turf and 150–200mm of topsoil |
| MOT Type 1 sub-base | 75–100mm compacted | Compact in 50mm layers |
| Weed membrane | — | Permeable geotextile, pinned down |
| Sharp sand / grano dust | 20–25mm | Screed and plate-compact |
| Artificial grass | — | Glue or pin at edges |
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Frequently asked questions
Planning estimates only
These results are estimates for planning purposes only. Actual material quantities can vary based on site conditions, compaction, wastage, product size, installation method and supplier guidance. For structural, safety-critical or regulated work, always consult a qualified professional.