Kelvins to Degrees Fahrenheit (K to °F) Converter
To convert kelvin to Fahrenheit, use °F = (K − 273.15) × 9/5 + 32. For example, 20 K = -423.67 °F.
Quick facts
- Formula: °F = (K − 273.15) × 9/5 + 32
- Water freezes at 32 °F and boils at 212 °F (at sea level).
- Normal body temperature is about 98.6 °F.
- −40 is the same in Celsius and Fahrenheit.
How to convert kelvins to degrees Fahrenheit
Temperature scales have different zero points, so you cannot just multiply: you need the offset as well as the multiplier.
Worked example: 25 K = -414.67 °F.
Source: BIPM, The International System of Units (SI Brochure, 9th edition, 2019), for the kelvin and degree Celsius.
Kelvins to Degrees Fahrenheit conversion table
| Kelvins [K] | Degrees Fahrenheit [°F] |
|---|---|
| -40 K | -531.67 °F |
| -20 K | -495.67 °F |
| -10 K | -477.67 °F |
| 0 K | -459.67 °F |
| 10 K | -441.67 °F |
| 20 K | -423.67 °F |
| 25 K | -414.67 °F |
| 30 K | -405.67 °F |
| 37 K | -393.07 °F |
| 40 K | -387.67 °F |
| 50 K | -369.67 °F |
| 100 K | -279.67 °F |
Kelvins vs Degrees Fahrenheit
| Kelvin | Fahrenheit | |
|---|---|---|
| Symbol | K | °F |
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.
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.
Frequently asked questions
What is the formula to convert kelvin to Fahrenheit?
°F = (K − 273.15) × 9/5 + 32. This conversion needs an offset as well as a multiplier because the scales have different zero points.
What is 0 K in °F?
0 K = -459.67 °F.
What is 100 K in degrees Fahrenheit?
100 K = -279.67 °F.
What is 37 K in °F?
37 K = -393.07 °F.
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