Bug ID Tools & Calculators
Free, practical tools for identifying and preventing household bugs — estimate a size, sort spiders from insects, classify a find, score your home’s risk, plan monitor traps, and check the season.
Bug Size Estimator
Enter a body length and get its size band — Tiny to Very Large — plus a few common household bugs typically found in that range
Spider vs Insect ID Key
Count the legs, note wings or antennae, and see whether you're looking at an insect, an arachnid, or a myriapod like a centipede
Benign vs Nuisance Bug Classifier
Pick a common household bug and see whether it's beneficial, a harmless nuisance, or a genuine property-damage risk
Infestation Risk Checklist
Check off moisture, clutter, and exclusion conditions around your home to get a weighted risk score and prevention steps
Trap Spacing Calculator
Enter a room's dimensions to get a suggested layout for non-chemical sticky monitor traps, perimeter plus interior
Seasonal Pest Calendar
Pick a month and hemisphere to see which household bugs are typically active or entering homes that time of year