| Scenario | Area | Depth | Density | Waste | Compaction | Bag Weight |
|---|---|---|---|---|---|---|
| Small court | 300 m² | 25 mm | 1600 kg/m³ | 5% | 5% | 25 kg |
| Play zone | 500 m² | 30 mm | 900 kg/m³ | 7% | 6% | 20 kg |
| Sports field | 7,000 m² | 35 mm | 560 kg/m³ | 8% | 7% | 22.7 kg |
- Area (m²) = Length × Width, or Area Override
- Depth (m) = Depth × unit conversion
- Base Volume (m³) = Area × Depth
- Procure Volume (m³) = Base Volume × (1 + Compaction%) × (1 + Waste%)
- Procure Mass (kg) = Procure Volume × Bulk Density
- Bags = ceil(Procure Mass ÷ Bag Weight)
- Enter length and width, or provide an area override.
- Set the infill depth to match the turf system.
- Select a material preset or enter a custom density.
- Add waste and compaction allowances for realistic ordering.
- Set bag weight to estimate bag counts for delivery.
- Press Calculate to view results above the form.
- Use CSV or PDF to share quantities with suppliers.
Depth selection and performance
Infill depth controls fiber support, surface stability, and ball response. Measure the exposed pile height, then set a target depth that leaves visible fiber for traction. For many sports surfaces, installed depths commonly fall between 20 and 40 millimeters, but the supplier specification should govern. Enter depth carefully, because volume scales directly with depth, and small changes create large ordering differences on big areas. Confirm depth after final grooming and play testing.
Bulk density and material choice
Ordering by weight requires a realistic bulk density. Silica sand is dense and packs tightly, while crumb rubber and cork are lighter and more compressible. Use product data sheets whenever possible and avoid using particle density from laboratory reports. If you switch materials mid project, recalculate using the new density, because equal volumes can differ by several tonnes across the same field footprint.
Allowances for waste and compaction
Waste covers handling losses, windy placement, and cleanup during brushing. Compaction allowance accounts for settlement as infill migrates and locks into the turf canopy. Using both allowances produces a procurement quantity that is closer to real delivery needs. Typical combined allowances range from 8 to 15 percent, depending on crew experience, equipment, and weather exposure during installation.
Bag counts and logistics planning
Bag count is useful for budgeting, staging, and transport planning. Standard bag weights vary by supplier, so confirm the label weight before ordering. Round up to whole bags to prevent shortages, and consider partial pallet quantities for remote sites. For bulk deliveries, convert the final mass to tonnes and coordinate offloading access, storage protection, and dust control measures.
Quality checks during installation
After spreading and brushing, verify depth at multiple points using a depth gauge or marked probe. Compare measured depths to your target and adjust with incremental top ups rather than one large correction. Record as built quantities, weather conditions, and compaction passes for handover documentation. Using consistent checks helps maintain uniform play characteristics and supports warranty compliance.
What area should I use for irregular shapes?
Use a measured total area from drawings or a site takeoff. If the surface is segmented, sum each zone area. Enter the combined area in the override field to avoid length and width assumptions.
Why does compaction increase the order quantity?
Infill settles as it is brushed and vibrated into the canopy. Ordering extra material ensures you can reach the specified finished depth after compaction and early migration during initial use.
Which density value is the correct one?
Use bulk density for the delivered product, typically shown on the supplier data sheet. Bulk density reflects air voids and packing, which determines weight per cubic meter for ordering and transport.
How do I choose a waste percentage?
Start with 5 percent for controlled installs. Increase it for windy sites, manual spreading, long carry distances, or frequent cleanup. Document the chosen allowance in your estimate notes for review.
Can I order by volume instead of bags?
Yes. Use the procure volume output for bulk deliveries or super sacks. Coordinate minimum order quantities, moisture limits, and delivery access. Convert the mass output to tonnes for haul and lifting plans.
How should I verify results on site?
Check infill depth at multiple grid points after brushing. Compare averages to the target and add infill in small passes until uniform. Record final readings for handover and future maintenance planning.