Unit Converter

How it works

All non-temperature units convert through a common base unit (meters for length, kilograms for mass, liters for volume). Multiplication by the source's "to-base" factor gives the value in base units; dividing by the target's "to-base" gives the final result. This keeps the math symmetric and rounding-stable no matter which two units you pick.

Temperature is special

Temperatures don't scale linearly because their zero points differ (Celsius starts at the freezing point of water, Fahrenheit at a brine mixture, Kelvin at absolute zero). The converter routes every input through Celsius first:

then applies the inverse to land in your target unit.

Units covered

• Length — m, cm, km, mi, ft, in
• Mass — kg, g, lb, oz
• Volume — L, mL, US gallons, US cups
• Temperature — °C, °F, K

More categories (area, speed, energy, data) are on the roadmap. For one-off niche conversions, the unit definitions live in src/engines/v1/units.js — add a row and it appears in the dropdown.