Unit converter
Length, weight, volume, area, temperature — anything to anything.
How conversions work here
Every unit in a category has a fixed factor relative to a base unit (meters for length, kilograms for weight, liters for volume, square meters for area). To convert, we multiply into the base unit and divide back out into your target unit. The factors are NIST/SI definitions, so the conversions are exact down to floating-point precision.
Temperature is special
Temperature scales don't share a zero point — 0°C is not the same physical temperature as 0°F or 0 K. So we can't use a simple multiplier; instead we use the proper conversion formulas:
- °F → °C: (F − 32) × 5/9
- °C → °F: C × 9/5 + 32
- °C → K: C + 273.15
US vs imperial gallons
We use US gallons, quarts, pints, and fluid ounces — these are slightly smaller than the UK imperial equivalents (a US gallon is ~3.79 L, an imperial gallon is ~4.55 L). If you're working from a UK recipe, multiply by 1.2 to convert from US to imperial.
Looking for currency or time-zone?
For currency conversion at live rates, use the currency converter. For time-zone math, the date-and-time tools are a better fit.