Temperature Converter
Online temperature converter. Type a value in Celsius, Fahrenheit or Kelvin and see it converted to the other units instantly. Just enter a value in one of the fields and the others are filled in automatically with the converted results.
What is temperature?
Temperature is a measure of how hot or cold an object, environment or substance is. It is related to the motion of particles: the higher the temperature, the faster those particles move.
Main temperature scales
- Celsius (°C): used day to day in most countries
- Fahrenheit (°F): common in the United States
- Kelvin (K): used in science and physics calculations
How to convert temperatures
- Celsius to Fahrenheit — Multiply by 9, divide by 5 and add 32
- Fahrenheit to Celsius — Subtract 32 and multiply by 5/9
- Celsius to Kelvin — Add 273.15
- Kelvin to Celsius — Subtract 273.15
Conversion examples
- 0°C = 32°F
- 100°C = 212°F
- 0°C = 273.15 K
Celsius
The Celsius scale is based on the freezing point (0°C) and boiling point (100°C) of water. It is the most widely used scale in everyday life.
Kelvin
Kelvin is an absolute scale, used mainly in science. It starts at absolute zero (0 K), where there is no thermal motion.
Fahrenheit
The Fahrenheit scale is used mainly in the United States. On this scale, water freezes at 32°F and boils at 212°F.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the temperature in Celsius by 1.8 and add 32. For example, 25 °C = 25 × 1.8 + 32 = 77 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 and divide by 1.8. For example, 100 °F = (100 − 32) ÷ 1.8 ≈ 37.8 °C.
How do I convert Celsius to Kelvin?
Add 273.15 to the temperature in Celsius. For example, 0 °C = 273.15 K.