Calculators
Unit Converter
Convert length, mass, area, volume and temperature.
Runs in your browser · No file or text uploads
Preparing your tool…
What Unit Converter helps you do
Compare measurements using clearly defined units. US customary volume units are explicitly labeled to distinguish them from Imperial measures.
How to use it
- Choose a measurement category.
- Enter a value and select the input and output units.
- Calculate and review the conversion factor or temperature formula.
Input and output example
INPUT
Length: 1 in → cmOUTPUT
2.54 cm
Supported formats and limits
- Volume uses US customary definitions; Imperial gallons and cups are not included.
- Temperatures must be at or above absolute zero. Weight units here measure mass.
How the result is calculated
Multiplicative units use value × input base factor ÷ output base factor. 1 in = 0.0254 m; 1 lb = 0.45359237 kg. °C = (°F − 32) × 5/9; K = °C + 273.15. Up to 6 decimal places.
Frequently asked questions
What definition is used for pyeong?
1 Korean pyeong = 400/121 square meters. Only the displayed result is rounded.