Fahrenheit to Kelvin Converter
To convert Fahrenheit to Kelvin, use the formula K = (F - 32) × 5/9 + 273.15. For example, 25 Fahrenheit equals 269.2611111 Kelvin. Use the calculator above for your value, or check the examples and reference table below.
Formula
K = (F - 32) × 5/9 + 273.15
Use the temperature formula to convert Fahrenheit values to Kelvin.
Example Conversions
0 Fahrenheit (F)
255.3722222 Kelvin (K)
1 Fahrenheit (F)
255.9277778 Kelvin (K)
25 Fahrenheit (F)
269.2611111 Kelvin (K)
100 Fahrenheit (F)
310.9277778 Kelvin (K)
212 Fahrenheit (F)
373.15 Kelvin (K)
Conversion Table
| Fahrenheit (F) | Kelvin (K) |
|---|---|
| 0 | 255.3722222 |
| 1 | 255.9277778 |
| 10 | 260.9277778 |
| 20 | 266.4833333 |
| 25 | 269.2611111 |
| 32 | 273.15 |
| 37 | 275.9277778 |
| 50 | 283.15 |
| 75 | 297.0388889 |
| 100 | 310.9277778 |
| 212 | 373.15 |
| 273.15 | 407.1222222 |
How to Convert Manually
Use these steps to convert Fahrenheit values to Kelvin without the calculator.
- Write down the value in Fahrenheit (F) that you want to convert.
- Apply the formula: K = (F - 32) × 5/9 + 273.15.
- For example, converting 10 Fahrenheit gives 260.9277778 Kelvin.
- Label the result as Kelvin (K).
About Fahrenheit and Kelvin
The degree Fahrenheit sets water's freezing point at 32 °F and boiling point at 212 °F, dividing the interval into 180 degrees. The US uses it for weather, cooking, and medicine. The kelvin is the SI base unit of thermodynamic temperature, defined since 2019 by fixing the Boltzmann constant. Its zero point is absolute zero, and one kelvin equals one degree Celsius in size. The two scales are related by the formula K = (F - 32) × 5/9 + 273.15. Fahrenheit is used in US weather forecasts and thermostats and in US oven and recipe temperatures. Kelvin is used in physics and chemistry calculations.
Precision and Rounding:Temperature conversions are formula-based, not factor-based, so apply the full formula before rounding. Whole degrees are fine for weather and cooking; lab work, medicine, and HVAC commissioning usually carry one or two decimal places.
See our guide to converting temperature manually for a full walkthrough of the formulas.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Fahrenheit equals263.7055556Kelvin.
15 F -> 263.7055556 K
FAQ
How do I convert Fahrenheit to Kelvin?
Use the temperature formula to convert Fahrenheit values to Kelvin.
What is the formula for Fahrenheit to Kelvin?
The formula is K = (F - 32) × 5/9 + 273.15.
How many Kelvin are in 1 Fahrenheit?
1 Fahrenheit equals 255.9277778 Kelvin.
Can I convert Kelvin back to Fahrenheit?
Yes. 1 Kelvin equals -457.87 Fahrenheit, and the related converter can reverse the calculation.
What are common names for Fahrenheit and Kelvin?
Fahrenheit is shown as F and may also be searched as fahrenheit, °F. Kelvin is shown as K and may also be searched as kelvin, °K.
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