Temperature Converter
Celsius, Fahrenheit, Kelvin and Rankine. Temperature scales have different zero points, so conversion is a shift plus a scale, not a single multiplication.
−17.22222222 °C
1 °F = −17.22222222 °C
1 Fahrenheit in every temperature unit
Celsius−17.222222 °C
kelvin255.92778 K
Rankine460.67 °R
Fahrenheit to Celsius table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| −40 | −40 |
| −20 | −28.888889 |
| 0 | −17.777778 |
| 10 | −12.222222 |
| 20 | −6.6666667 |
| 30 | −1.1111111 |
| 37 | 2.7777778 |
| 50 | 10 |
| 100 | 37.777778 |
| 200 | 93.333333 |
Units and factors
| Unit | Symbol | Freezing point of water |
|---|---|---|
| Celsius | °C | 0 |
| Fahrenheit | °F | 32 |
| kelvin | K | 273.15 |
| Rankine | °R | 491.67 |
Single conversions
Questions people ask
How do I convert Fahrenheits to Celsiuss?
Use the formula shown on this page; temperature needs an offset as well as a scale factor. For example 30 °F = −1.11111 °C.
What is the base unit for temperature?
The converter uses the kelvin as its internal base. Every unit is converted to kelvins and then to the target unit, so any pair of units works.
Where do the conversion factors come from?
From the legal definitions published in NIST Special Publication 811 and the SI Brochure (BIPM). Where a unit is defined exactly, the factor is exact.