Temperature Units and Conversions

Popular conversions

2 pairs

Celsius ↔ Fahrenheit
C ↔ F
Celsius to Fahrenheit Fahrenheit to Celsius
Celsius ↔ Kelvin
C ↔ K
Celsius to Kelvin Kelvin to Celsius

Unit guides

3 units

Detailed guide to Temperature

Temperature indicates thermal state and is one of the most widely used measured quantities in engineering, science and everyday life.

Unlike purely proportional unit families, temperature conversions may include an offset as well as a scale factor.

Physical quantity: Temperature
SI base unit: Kelvin
Common engineering scale: Celsius
Typical offset example: 0 °C = 273.15 K
Typical use: Weather, process control and thermodynamics

What is temperature?

Temperature represents the thermal condition of a body or environment.

It is used in weather data, materials, energy systems, fluid properties and laboratory work.

Celsius, Fahrenheit and Kelvin

Celsius is widely used in daily and engineering practice. Fahrenheit remains common in some countries, while Kelvin is the SI base unit used in science and thermodynamics.

Kelvin and Celsius share the same interval size, but Kelvin starts from absolute zero.

Why are temperature conversions special?

Temperature scales do not always share the same zero point, so some conversions require both multiplication and addition or subtraction.

This is why Celsius-to-Fahrenheit and Celsius-to-Kelvin formulas differ from simple proportional conversions such as length or mass.