Fahrenheit to Kelvin Converter
Convert °F to Kelvin instantly. Free online calculator: K = (°F − 32) × 5/9 + 273.15. For science, engineering, and labs.
How to Convert Fahrenheit to Kelvin
To convert Fahrenheit to Kelvin, subtract 32, multiply by 5/9, then add 273.15.
Conversion Formula:
((value - 32) * 5/9) + 273.15Conversion Examples
Example: 32 °F to K
- (32−32)×5/9+273.15 = 273.15 K
32°F = 273.15 K
Freezing point of water.
Example: 212 °F to K
- (212−32)×5/9+273.15 = 373.15 K
212°F = 373.15 K
Boiling point of water.
Conversion Chart
| Fahrenheit | Kelvin |
|---|---|
| -40 | 233.15 |
| 0 | 255.37 |
| 32 | 273.15 |
| 68 | 293.15 |
| 77 | 298.15 |
| 86 | 303.15 |
| 98.6 | 310.15 |
| 122 | 323.15 |
| 212 | 373.15 |
| 451 | 505.93 |
Conversion Formula
Fahrenheit degrees are smaller and offset from absolute zero. Subtract 32 to align with Celsius, scale by 5/9 to match the larger degree size, then add 273.15 to shift to the absolute Kelvin baseline.
Quick Conversion Tip
Convert to Celsius first, then add 273.15. The calculator combines both steps automatically.
Unit Definitions
Fahrenheit (°F)
Imperial temperature scale with 32°F at water freezing and 212°F at boiling.
Convert to Kelvin by first reaching Celsius with (°F − 32) × 5/9, then adding 273.15. To Rankine, simply add 459.67.
Kelvin (K)
Absolute temperature scale beginning at absolute zero, widely used in science.
To Celsius, subtract 273.15. To Fahrenheit, use (K − 273.15) × 9/5 + 32. To Rankine, multiply Kelvin by 9/5.
Common Use Cases
- Physics and chemistry labs.
- Engineering thermodynamics.
- Converting US weather data to SI.
- Exam unit conversion practice.
Understanding the Conversion
Fahrenheit to Kelvin: convert to Celsius first ((°F−32)×5/9), then add 273.15. Kelvin is absolute—0 K is absolute zero.
32°F = 273.15 K (water freezing in °F to K).
Physics and chemistry labs. The table and FAQ on this page walk through the factor if you need it.
FAQs
How do I convert Fahrenheit to Kelvin?
K = (°F − 32) × 5/9 + 273.15.
What is 0 K in Fahrenheit?
About −459.67°F (absolute zero).
Is Kelvin the same as Celsius offset?
K = °C + 273.15; same size degree.