Conversion Table for Temperature Units: Celsius, Fahrenheit, and Kelvin

Keeping track of temperature units can sometimes be tricky, especially since we switch between different systems in everything from everyday life and meteorology to industry and science. Celsius (°C), Fahrenheit (°F), and Kelvin (K) are the most common units you’ll encounter.

Here's a quick guide to the most common conversions and formulas to make things easier.

Conversion Table for Temperature Units

Abbreviations:

• °C = Celsius
• °F = Fahrenheit
• K = Kelvin

How many Kelvin is 0 °C?

0 °C is equal to 273.15 Kelvin.

Sample calculation from Celsius to Kelvin:

If your temperature is 20°C:
20 + 273.15 = 293.15 K
Thus, the 20 °C = 293.15 K.

How much is 100 °C in Fahrenheit?

100 °C (the boiling point of water) is equal to 212 degrees Fahrenheit.

Sample calculation from Celsius to Fahrenheit:

If your temperature is 100 °C:
(100 × 9/5) + 32 = 180 + 32 = 212 °F
Thus, the 100 °C = 212 °F.

Common Temperature Conversions

Below are some of the most common conversions between the various units of temperature.

Celsius to Fahrenheit

A temperature difference of 1 degree Celsius is equivalent to 1.8 degrees Fahrenheit, but you also have to take the starting point into account (the scales do not meet at zero).

Formula:

( °C × 9/5) + 32 = °F

Example:

0 °C = 32 °F
20 °C = 68 °F
37 °C = 98.6 °F
100 °C = 212 °F

If the oven temperature is 200 °C, the conversion is:

(200 × 9/5 + 32 = 360 + 32 = 392 °F

In other words, 200 °C is equal to 392 °F.

Fahrenheit to Celsius

To convert Fahrenheit to Celsius, first subtract 32 and then multiply by 5/9 (or divide by 1.8).

Formula:

(°F – 32) × 5/9 = °C

Example:

32 °F = 0 °C
68 °F = 20 °C
100 °F = 37.8 °C
212 °F = 100 °C

A recipe that specifies 400 °F is equivalent to:

(400 – 32) × 5/9 = 368 × 5/9 = 204.4 °C

Celsius to Kelvin

The Kelvin scale has the same interval as the Celsius scale, but is based on absolute zero (–273.15 °C).

Formula:

°C + 273.15 = K

Example:

– 273.15 °C = 0 K
0 °C = 273.15 K
25 °C = 298.15 K

100 °C = 373.15 K

Kelvin is often used in physics and thermodynamics, where absolute temperatures are calculated.

Kelvin to Celsius

To convert from Kelvin back to Celsius, subtract 273.15.

Formula:

K – 273.15 = °C

Example:

273, 15 K = 0 °C
300 K = 26.85 °C
500 K = 226.85 °C