Degrees Fahrenheit to Kelvins (°F to K) Converter
To convert Fahrenheit to kelvin, use K = (°F − 32) × 5/9 + 273.15. For example, 20 °F = 266.48 K.
Quick facts
- Formula: K = (°F − 32) × 5/9 + 273.15
- Water freezes at 273.15 K and boils at 373.15 K (at sea level).
- Normal body temperature is about 310.2 K.
- −40 is the same in Celsius and Fahrenheit.
How to convert degrees Fahrenheit to kelvins
Temperature scales have different zero points, so you cannot just multiply: you need the offset as well as the multiplier.
Worked example: 25 °F = 269.261 K.
Source: BIPM, The International System of Units (SI Brochure, 9th edition, 2019), for the kelvin and degree Celsius.
Degrees Fahrenheit to Kelvins conversion table
| Degrees Fahrenheit [°F] | Kelvins [K] |
|---|---|
| -40 °F | 233.15 K |
| -20 °F | 244.26 K |
| -10 °F | 249.82 K |
| 0 °F | 255.37 K |
| 10 °F | 260.93 K |
| 20 °F | 266.48 K |
| 25 °F | 269.26 K |
| 30 °F | 272.04 K |
| 37 °F | 275.93 K |
| 40 °F | 277.59 K |
| 50 °F | 283.15 K |
| 100 °F | 310.93 K |
Degrees Fahrenheit vs Kelvins
| Fahrenheit | Kelvin | |
|---|---|---|
| Symbol | °F | K |
What is a Fahrenheit?
A scale where water freezes at 32° and boils at 212° at standard atmospheric pressure. Used for weather and everyday temperature in the United States.
What is a kelvin?
The SI base unit of temperature, starting at absolute zero with no negative values. Used in physics, chemistry, and engineering wherever an absolute scale is required.
Frequently asked questions
What is the formula to convert Fahrenheit to kelvin?
K = (°F − 32) × 5/9 + 273.15. This conversion needs an offset as well as a multiplier because the scales have different zero points.
What is 0 °F in K?
0 °F = 255.3722 K.
What is 100 °F in kelvins?
100 °F = 310.9278 K.
What is 37 °F in K?
37 °F = 275.9278 K.
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