Kelvin to Degrees Fahrenheit Converter
Convert kelvin to degrees Fahrenheit instantly with this free kelvin to degrees Fahrenheit converter. Enter any value to get an accurate temperature conversion, plus the formula, the conversion factor and a full reference table.
What is 1 kelvin in degrees Fahrenheit?
1 kelvin is equal to exactly -457.87 degrees Fahrenheit.
1K → -457.87°F using °F = (K − 273.15) × 9/5 + 32
1 kelvin = -457.87 degrees Fahrenheit
Kelvin to Degrees Fahrenheit formula
°F = (K − 273.15) × 9/5 + 32
Temperature scales use an offset as well as a ratio, so kelvin and degrees Fahrenheit cannot be converted by multiplication alone.
Worked examples
- -20 kelvin = -495.67 degrees Fahrenheit — -20K → -495.67°F using °F = (K − 273.15) × 9/5 + 32
- 10 kelvin = -441.67 degrees Fahrenheit — 10K → -441.67°F using °F = (K − 273.15) × 9/5 + 32
- 30 kelvin = -405.67 degrees Fahrenheit — 30K → -405.67°F using °F = (K − 273.15) × 9/5 + 32
Kelvin to Degrees Fahrenheit conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Kelvin (K) | Degrees Fahrenheit (°F) |
|---|---|
| -40 K | -531.67 °F |
| -20 K | -495.67 °F |
| -10 K | -477.67 °F |
| 0 K | -459.67 °F |
| 5 K | -450.67 °F |
| 10 K | -441.67 °F |
| 15 K | -432.67 °F |
| 20 K | -423.67 °F |
| 25 K | -414.67 °F |
| 30 K | -405.67 °F |
| 35 K | -396.67 °F |
| 37 K | -393.07 °F |
| 40 K | -387.67 °F |
| 50 K | -369.67 °F |
| 75 K | -324.67 °F |
| 100 K | -279.67 °F |
When you need to convert kelvin to degrees Fahrenheit
- Setting an oven from a recipe written in the other scale.
- Reading a weather forecast while travelling.
- Interpreting a thermostat, fever reading or industrial spec sheet.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Kelvin (K)
- 0 K is absolute zero
- Room temperature is about 294 K
Degree Fahrenheit (°F)
- Water freezes at 32 °F and boils at 212 °F
- Room temperature is about 70 °F
Common mistakes to avoid
- Multiplying without applying the offset. Temperature scales do not share a zero point, so a plain conversion factor gives the wrong answer.
- Converting a temperature difference the same way as a temperature. A change of 10 °C is a change of 18 °F, not 50 °F.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
For weather and cooking, one decimal place is more than enough. Clinical and laboratory readings normally need 0.1° resolution, and scientific work should carry the full value through the calculation before rounding.
How these units are defined
- Kelvin (K): The SI base unit of temperature, starting at absolute zero. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Degree Fahrenheit (°F): The everyday US temperature scale: water freezes at 32 °F, boils at 212 °F. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 kelvin in degrees Fahrenheit?
- 1 kelvin is equal to -457.87 degrees Fahrenheit.
- How many kelvin are in one degree Fahrenheit?
- There are 255.927778 kelvin in 1 degree Fahrenheit.
- How do you convert kelvin to degrees Fahrenheit?
- Use the formula °F = (K − 273.15) × 9/5 + 32.
- What is 10 kelvin in degrees Fahrenheit?
- 10 kelvin is -441.67 degrees Fahrenheit. 10K → -441.67°F using °F = (K − 273.15) × 9/5 + 32.