Convert Kelvin to Celsius
Instant, accurate K → °C conversion with a live converter, table and formula.
1 Kelvin = -272.15 Celsius
Kelvin to Celsius table
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0.5 | -272.65 |
| 1 | -272.15 |
| 2 | -271.15 |
| 5 | -268.15 |
| 10 | -263.15 |
| 20 | -253.15 |
| 50 | -223.15 |
| 100 | -173.15 |
| 500 | 226.85 |
| 1000 | 726.85 |
Formula
This is a non-linear conversion — use the converter above or the table below for exact values. As a reference, 1 Kelvin = -272.15 Celsius.
Example
10 Kelvin = -263.15 Celsius.
What is a Kelvin?
Kelvin (K) is the SI temperature scale starting at absolute zero (0 K = −273.15°C).
What is a Celsiu?
Celsius (°C) sets water's freezing point at 0° and boiling at 100°.
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 | Celsius |
|---|---|---|
| Home freezer | 255 K | -18 °C |
| Comfortable room | 294 K | 21 °C |
| Body temperature | 310 K | 37 °C |
| Hot summer day | 313 K | 40 °C |
| Baking oven | 453 K | 180 °C |
| Water boils (sea level) | 373 K | 100 °C |
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 Celsius in a Kelvin?+
1 Kelvin = -272.15 Celsius.
How do I convert Kelvin to Celsius?+
Enter the value in the Kelvin box above and the Celsius value appears instantly. You can also type in the Celsius box to convert the other way.
Is this K to °C converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.