Convert Kelvin to Fahrenheit
Use this free converter to change kelvin (K) into fahrenheit (°F). Kelvin and fahrenheit both measure temperature. As a quick reference, 1 K equals -457.87 °F, and 1 °F equals 255.92778 K.
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Fahrenheit (°F)
-457.87
1 K = -457.87 °F
Temperature conversion table
| Kelvin | Fahrenheit |
|---|---|
| 0.01 | -459.652 |
| 0.1 | -459.49 |
| 0.5 | -458.77 |
| 1 | -457.87 |
| 2 | -456.07 |
| 3 | -454.27 |
| 5 | -450.67 |
| 10 | -441.67 |
| 20 | -423.67 |
| 25 | -414.67 |
| 50 | -369.67 |
| 100 | -279.67 |
| 1,000 | 1340.33 |
How to convert Kelvin to Fahrenheit
°F = (K − 273.15) × 9/5 + 32
- Enter the number of kelvin you want to convert.
- The converter instantly shows the equivalent value in fahrenheit.
- For example, 25 K = -414.67 °F using the formula above.
- Use the swap button to reverse the conversion (fahrenheit to kelvin).
About these units
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.
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.
Frequently asked questions
How many fahrenheit are in a kelvin?
There are -457.87 °F in 1 K. To convert, apply the temperature formula shown above.
How do I convert kelvin to fahrenheit?
°F = (K − 273.15) × 9/5 + 32 For example, 10 K = -441.67 °F.
Is this kelvin-to-fahrenheit 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 Kelvin to other temperature units
| Unit | 1 Kelvin equals |
|---|---|
| Celsius (°C) | -272.15 °C |
| Fahrenheit (°F) | -457.87 °F |
| Rankine (°R) | 1.8 °R |