Convert Fahrenheit to Kelvin
Use this free converter to change fahrenheit (°F) into kelvin (K). Fahrenheit and kelvin both measure temperature. As a quick reference, 1 °F equals 255.92778 K, and 1 K equals -457.87 °F.
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Kelvin (K)
255.92778
1 °F = 255.92778 K
Temperature conversion table
| Fahrenheit | Kelvin |
|---|---|
| 0.01 | 255.37778 |
| 0.1 | 255.42778 |
| 0.5 | 255.65 |
| 1 | 255.92778 |
| 2 | 256.48333 |
| 3 | 257.03889 |
| 5 | 258.15 |
| 10 | 260.92778 |
| 20 | 266.48333 |
| 25 | 269.26111 |
| 50 | 283.15 |
| 100 | 310.92778 |
| 1,000 | 810.92778 |
How to convert Fahrenheit to Kelvin
K = (°F − 32) × 5/9 + 273.15
- Enter the number of fahrenheit you want to convert.
- The converter instantly shows the equivalent value in kelvin.
- For example, 25 °F = 269.26111 K using the formula above.
- Use the swap button to reverse the conversion (kelvin to fahrenheit).
About these units
Fahrenheit (°F)
- Definition
- The degree Fahrenheit (°F) is a temperature unit where water freezes at 32° and boils at 212° at standard pressure.
- History
- Introduced by physicist Daniel Gabriel Fahrenheit in 1724 using brine and body temperature as reference points.
- Current use
- Fahrenheit remains the common temperature scale in the United States and a few other territories.
Kelvin (K)
- Definition
- The kelvin (K) is the SI base unit of temperature, starting at absolute zero with the same degree size as Celsius.
- History
- Proposed by William Thomson (Lord Kelvin) in 1848 and redefined in 2019 by fixing the Boltzmann constant.
- Current use
- Kelvin is used throughout science and engineering, especially in physics, chemistry, and astronomy.
Frequently asked questions
How many kelvin are in a fahrenheit?
There are 255.92778 K in 1 °F. To convert, apply the temperature formula shown above.
How do I convert fahrenheit to kelvin?
K = (°F − 32) × 5/9 + 273.15 For example, 10 °F = 260.92778 K.
Is this fahrenheit-to-kelvin converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Fahrenheit to other temperature units
| Unit | 1 Fahrenheit equals |
|---|---|
| Celsius (°C) | -17.222222 °C |
| Kelvin (K) | 255.92778 K |
| Rankine (°R) | 460.67 °R |