Fahrenheit to Kelvin
K = (°F − 32) × 5/9 + 273.15 — type a value and see the result instantly
1 °F = 255.93 K
⇄ Kelvin → FahrenheitFahrenheit and Kelvin differ in both zero point and degree size, so the conversion uses a formula: K = (°F − 32) × 5/9 + 273.15. The reverse is °F = (K − 273.15) × 9/5 + 32. For example, 32 °F = 273.15 K and 212 °F = 373.15 K.
Kelvin is the SI unit of temperature and starts at absolute zero (0 K = −459.67 °F); one kelvin equals 1.8 °F. Room temperature (68–72 °F) is about 293–295 K.
Kelvin starts at absolute zero (0 K = −459.67 °F) and uses Celsius-sized steps, so converting from Fahrenheit needs both an offset and a factor. Water freezes at 32 °F = 273.15 K and boils at 212 °F = 373.15 K.
Quick answers
Fahrenheit to Kelvin conversion table
| Fahrenheit (°F) | Kelvin (K) |
|---|---|
| −459.67 °F | 0 K |
| −100 °F | 199.82 K |
| −40 °F | 233.15 K |
| 0 °F | 255.37 K |
| 32 °F | 273.15 K |
| 50 °F | 283.15 K |
| 68 °F | 293.15 K |
| 72 °F | 295.37 K |
| 77 °F | 298.15 K |
| 98.6 °F | 310.15 K |
| 100 °F | 310.93 K |
| 212 °F | 373.15 K |
| 300 °F | 422.04 K |
| 451 °F | 505.93 K |
| 500 °F | 533.15 K |
| 1,000 °F | 810.93 K |
Kelvin to Fahrenheit quick table
| Kelvin (K) | Fahrenheit (°F) |
|---|---|
| 0 K | −459.67 °F |
| 100 K | −279.67 °F |
| 255.37 K | −0.004 °F |
| 273.15 K | 32 °F |
| 293.15 K | 68 °F |
| 310.15 K | 98.6 °F |
| 373.15 K | 212 °F |
| 400 K | 260.33 °F |
| 1,000 K | 1,340.33 °F |
| 5,778 K | 9,940.73 °F |
Frequently Asked Questions
What is 212 °F in K?
212 °F = 373.15 K (K = (°F − 32) × 5/9 + 273.15).
How do I convert Kelvin to Fahrenheit?
°F = (K − 273.15) × 9/5 + 32. For example, 273.15 K = 32 °F.
What is absolute zero?
Absolute zero is the lowest possible temperature: 0 K = −273.15 °C = −459.67 °F.
Why is there no degree sign with Kelvin?
Kelvin is an absolute SI unit, not a scale measured in degrees from a reference point, so it is written as 300 K, not 300 °K (the degree sign was dropped in 1967).