Free tools that stay out of your way
Instant calculators that run in your browser. No accounts, no tracking scripts required, estimates with clear disclaimers.
Tools
Roof snow load
Estimate design roof snow load (psf) from ZIP, pitch, and exposure.
Loan payoff / APR
Months to clear, total interest, and amortization from principal + APR.
Square footage
Multi-room length × width estimator with optional wall-area helper.
BMI calculator
CDC adult categories — imperial or metric, instant and private.
Can I burn this?
Open-burning rules by ZIP for brush, yard waste, leaves, and more.