Calculator
Use conservative spacing when children, pets, or wildlife are present.
Example data table
These examples show how spacing, perimeter, and infestation change station needs.
| Scenario | Area (m²) | Perimeter (m) | Target | Infestation | Spacing (m) | Perimeter interval (m) | Estimated stations |
|---|---|---|---|---|---|---|---|
| Small garden beds | 250 | 70 | Rodents | Low | 10 | 12 | ~6–8 |
| Greenhouse edges | 600 | 110 | Rodents | Moderate | 9 | 9 | ~12–16 |
| Compost + shed area | 450 | 95 | Rodents | High | 8 | 8 | ~18–24 |
| Ant treatment lanes | 300 | 80 | Ants | Moderate | 6 | 10 | ~10–14 |
Formula used
This tool combines an area-based estimate and a perimeter-based estimate, then adjusts for conditions.
1) Area estimate
Stationsarea = ceil( Area ÷ Spacing² )
Use a smaller spacing for denser coverage.
Use a smaller spacing for denser coverage.
2) Perimeter estimate
Stationsperimeter = ceil( Perimeter ÷ Interval )
Useful for fences, walls, hedges, and edges.
Useful for fences, walls, hedges, and edges.
3) Adjustments and final count
Factor = Infestation × Property × Placement × Target
Base = max(Stationsarea, Stationsperimeter) × Factor (or Sum, if selected)
Add-ons = (Entry points × Stations per entry) + Hotspots
Buffered = (Base + Add-ons) × (1 + Buffer%)
Final = round up (or nearest), then apply Minimum stations.
Base = max(Stationsarea, Stationsperimeter) × Factor (or Sum, if selected)
Add-ons = (Entry points × Stations per entry) + Hotspots
Buffered = (Base + Add-ons) × (1 + Buffer%)
Final = round up (or nearest), then apply Minimum stations.
How to use this calculator
- Measure area and perimeter for the zone you will protect.
- Select your target pest and a realistic infestation level.
- Choose spacing and perimeter interval based on access and risk.
- Add entry points and hotspots like drains, feed, and compost.
- Use a buffer if bait is often removed or weathered.
- Calculate, then download CSV/PDF for records and planning.
Recent results (saved in this browser session)
Up to 25 entries are stored.
No calculations yet. Run the calculator to build history.
Safety note: Follow local regulations and product labels. Use tamper-resistant stations where children, pets, or wildlife may access bait.