Bait Station Count & Spacing Calculator

The calculator divides your building perimeter by the station spacing and rounds up, so no gap ever exceeds the spacing. The spacing default comes from the pest type — mouse 15 ft, rat 25 ft, termite 10 ft — and you can override it for your product label or a commercial program. An optional interior allocation adds one station per density block.

spacing default  = { mouse: 15, rat: 25, termite: 10 }   (feet)
spacing used     = your override, else the pest default

perimeter stations = ceil(perimeter ÷ spacing)
interior stations  = ceil(interior area ÷ sq ft per station)   (0 if area = 0)
total stations     = perimeter stations + interior stations

estimated cost     = total stations × price per station        (if a price is set)

The round-up (ceil) is applied to each term independently, then summed — flooring or rounding after the sum would leave an oversized gap. Spacing defaults follow nailthequote.com (mouse, rat) and termitehq.com (termite 10 ft, up to 20 ft); the 1-per-1,000-sq-ft interior density follows nailthequote.com. Spacing is clamped to a plausible 5–120 ft range.

Fixed-interval spacing is an industry rule of thumb, not a placement rule. The NPMA notes assessment-based (activity-driven) placement outperforms a flat interval, and exterior rodenticide bait-station requirements (tamper- resistant / restricted-use) vary by jurisdiction. Treat this as a starting count and ordering aid; your EPA-registered product label and local rules govern actual placement.