Convert Kelvin to Fahrenheit
Instant, accurate K → °F conversion with a live converter, table and formula.
1 Kelvin = -457.87 Fahrenheit
Kelvin to Fahrenheit table
| Kelvin (K) | Fahrenheit (°F) |
|---|---|
| 0.5 | -458.77 |
| 1 | -457.87 |
| 2 | -456.07 |
| 5 | -450.67 |
| 10 | -441.67 |
| 20 | -423.67 |
| 50 | -369.67 |
| 100 | -279.67 |
| 500 | 440.33 |
| 1000 | 1340.33 |
Formula
This is a non-linear conversion — use the converter above or the table below for exact values. As a reference, 1 Kelvin = -457.87 Fahrenheit.
Example
10 Kelvin = -441.67 Fahrenheit.
What is a Kelvin?
Kelvin (K) is the SI temperature scale starting at absolute zero (0 K = −273.15°C).
What is a Fahrenheit?
Fahrenheit (°F) sets water's freezing at 32° and boiling at 212°, used in the US.
Real-world reference points
Room comfort sits near 21°C / 70°F; body temperature near 37°C / 98.6°F; water boils at 100°C / 212°F at sea level.
| Reference | Kelvin | Fahrenheit |
|---|---|---|
| Home freezer | 255 K | -0.4 °F |
| Comfortable room | 294 K | 69.8 °F |
| Body temperature | 310 K | 98.6 °F |
| Hot summer day | 313 K | 104 °F |
| Baking oven | 453 K | 356 °F |
| Water boils (sea level) | 373 K | 212 °F |
Mistakes to avoid with temperature conversions
- Doubling °C does not double °F — the scales have different zero points; use the formula, not proportion.
- Forgetting −40 is the one temperature where Celsius and Fahrenheit agree.
- Writing 'degrees Kelvin' — Kelvin is an absolute scale with no degree sign (300 K, not 300°K).
Frequently asked questions
How many Fahrenheit in a Kelvin?+
1 Kelvin = -457.87 Fahrenheit.
How do I convert Kelvin to Fahrenheit?+
Enter the value in the Kelvin box above and the Fahrenheit value appears instantly. You can also type in the Fahrenheit box to convert the other way.
Is this K to °F converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.