Unit Converter
Quickly convert between metric and imperial units across length, weight, temperature, volume and area.
What is Unit Converter?
Universal converter between units of length, mass, temperature, volume, area, time, speed and energy. Covers metric (meter, kilo, liter) and imperial (foot, pound, gallon), plus less common units like nautical miles, fluid ounces and knots.
How to use
- Pick a category (length, mass, etc.).
- Select the source and target units.
- Type the value — conversion updates instantly.
- Swap the units anytime with the arrow button.
Frequently asked questions
Which units are supported?
Length (km, m, cm, mm, mi, yd, ft, in), weight (t, kg, g, mg, lb, oz, st), temperature (°C, °F, K), volume (m³, L, mL, US gal, UK gal, cup, tbsp, tsp, fl oz) and area (km², ha, m², cm², acre, ft², in²).
How accurate is it?
The conversions use the official SI factors and are accurate to 8 significant digits. For everyday use the precision is more than enough.
Does the temperature conversion handle negative values?
Yes — Celsius and Fahrenheit can be negative. Kelvin starts at 0, so converting back to Celsius will show negatives below 273.15 K.