Temperature Units

Find the right formula and tools for all temperature units. We use official rules to make sure every calculation is correct.

All Temperature Unit Pairs

Pick a starting unit to see all possible conversion tools for temperature.

We calculate all temperature units based on the standard Celsius (°C). This helps us keep all our tools accurate and reliable.

Below is the list of rules we use to calculate each temperature unit. You can use these to understand the math behind our tools.

Formula: 1 Fahrenheit = -17.22 Celsius
To do the math instantly, use our fahrenheit to celsius or celsius to fahrenheit tools.

Formula: 1 Kelvin = -272.15 Celsius
To do the math instantly, use our kelvin to celsius or celsius to kelvin tools.

To do the math instantly, use our rankine to celsius or celsius to rankine tools.

To do the math instantly, use our réaumur to celsius or celsius to réaumur tools.

Compare these units against other measurement systems on our homepage.

Access our high-fidelity calculators for other measurement systems and engineering metrics.