Fahrenheit to Kelvin Converter
Convert degrees Fahrenheit (°F) to kelvins (K) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Fahrenheit to Kelvin formula
K = (°F − 32) × 5/9 + 273.15
To convert degrees Fahrenheit to kelvins, apply the formula K = (°F − 32) × 5/9 + 273.15. For example, 68 °F:
K = (68 − 32) × 5/9 + 273.15K = 20 + 273.15K = 293.15
So 68 °F = 293.15 K.
Fahrenheit to Kelvin conversion table
Kelvin back to Fahrenheit
The same values converted the other way, rounded for everyday use:
| Kelvin | Fahrenheit |
|---|---|
| 0 K | -459.67 °F |
| 233.15 K | -40 °F |
| 255.37 K | -0.004 °F |
| 273.15 K | 32 °F |
| 283.15 K | 50 °F |
| 293.15 K | 68 °F |
| 298.15 K | 77 °F |
| 310.15 K | 98.6 °F |
About the units
Fahrenheit (°F)
The Fahrenheit scale puts water’s freezing point at 32 °F and boiling point at 212 °F. It is the everyday temperature scale in the United States.
Kelvin (K)
The kelvin is the SI unit of temperature. It starts at absolute zero (0 K = −273.15 °C) and uses degrees the same size as Celsius, so it never goes negative.
Frequently asked questions
How do you convert Fahrenheit to Kelvin?
Use K = (°F − 32) × 5/9 + 273.15. For example, 68 °F = 293.15 K.
What is 68 Fahrenheit in Kelvin?
68 °F = 293.15 K.
How do I convert Kelvin back to Fahrenheit?
Use the reverse formula: °F = (K − 273.15) × 9/5 + 32.