Rodent and Termite Bait Station 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)

bait per service   = total stations × label amount per placement
bait per year      = bait per service × services per year
containers to buy  = ceil(bait per year ÷ container size)      (units converted first)

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.

Bait load. Open Bait load to turn the count into an order. The label amount per placement and the container size are yours to enter from the product label and the product you buy: amounts differ by product, target species and infestation level, so the page carries no default for either and prints no label rate. Ounces, pounds, grams and kilograms convert to one another before the division; pieces (blocks, place packs, cartridges) divide only by a container counted in pieces. The order assumes every station gets the full label amount at every service, which is the upper bound, since a station that only needs a top-up uses less. It loads every station in the count, so if your interior stations hold traps rather than bait, set the interior area to 0 before you read the order.

A station count is a materials number, not a price. What the account is worth per visit, once the stations, the bait, the service interval and the drive are folded in, is worked out by the rodent control and exclusion pricing calculator. Stations also only hold the line, so pair this count with the exclusion materials takeoff for the mesh, sweeps and hardware cloth that actually close the entries, and with the conducive conditions that keep drawing rodents back to the building. On a commercial account the station map and every check are evidence at audit time, which is what the commercial pest control log book is built to hold.