Converters
12
Fahrenheit to Kelvin Converter
Convert fahrenheit to kelvin instantly with the formula, worked examples, rounding guidance, and related temperature conversions.
Units
85
Mode
Live
Pair-specific conversion guide
Fahrenheit to Kelvin formula
Converting Fahrenheit to Kelvin involves adding 459.67 to the Fahrenheit temperature, then multiplying by 5/9. This formula directly relates the Fahrenheit scale to the absolute temperature scale, where 0 Kelvin represents absolute zero. For example, 1 degree Fahrenheit equals 255.927777778 Kelvin, and 5 degrees Fahrenheit equals 258.15 Kelvin.
Formula model
K = (F + 459.67) * 5 / 9
1 Fahrenheit equals
Quick factor: 1 deg F = 255.927777778 K.
To quickly estimate, remember that 0°F is about 255.4 K, so add roughly 255 to the Fahrenheit value for a rough conversion.
Use the exact formula K = (F + 459.67) * 5 / 9 for precise scientific calculations, especially in physics or chemistry.
Temperature conversions can include both a scale and an offset, so a multiplication factor alone is not always sufficient.
Precision and rounding
The calculation uses the catalog's fixed scale and offset definitions between deg F and K. Full decimal precision is kept for the calculation; only the displayed value is rounded for readability.
Reference: NIST conversion factorsTemperature
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Conversion table
1 Fahrenheit equals
| Unit | Value |
|---|---|
| Celsius deg C | -17.2222222222 |
| Kelvin K | 255.927777778 |
FAQ
Fahrenheit to Kelvin questions
Why do I need to add 459.67 to Fahrenheit before converting to Kelvin?
The Fahrenheit scale has its zero point at -459.67°F, which corresponds to absolute zero (0 K). Adding 459.67 shifts the Fahrenheit value to an absolute scale, allowing the multiplication by 5/9 to convert to Kelvin.
What is the Kelvin equivalent of 10 degrees Fahrenheit?
10 degrees Fahrenheit equals 260.927777778 Kelvin, calculated using the formula K = (10 + 459.67) * 5 / 9.