Square feet, square meters, acres, hectares & more
Fahrenheit (°F), Celsius (°C) and Kelvin (K)
Pounds, kilograms, ounces, grams, tons & tonnes
US gallons, liters, cubic feet, quarts, pints & mL
Miles per hour, km/h, m/s, knots & feet per second
BTU, kilowatt-hours, joules, watts, therms & calories
All converters default to US customary units first (feet, sq ft, °F, gallons, mph, BTU, lbs) — matching how US property listings, construction specs, and utility bills are presented.
We include Canadian gallons, Celsius, metric measurements used by Canadian builders, plus instant cross-border speed and fuel conversions for road trips.
Every unit choice was picked for homeowners and investors: lot acreage, floor area, water heater gallons, furnace BTUs, energy bill therms, and lumber measurements.
Calculations use industry standard conversion factors with 8+ decimal precision, rounded for readability. Results update on every keystroke — no submit button needed.