Kelvin to Celsius
Convert kelvin (K) to celsius (°C) instantly — with formula and reference table.
Quick answer: 1 K = -272.15 °C. To convert kelvin to celsius, apply K × 1 + -273.15.
Converting kelvin to celsius
This converter changes a value in kelvin (K) into celsius (°C). One kelvin equals -272.15 °C. To convert Kelvin to Celsius, subtract 273.15. One degree is the same magnitude on both scales. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
°C = K × 1 + -273.15
Example
Convert 25 K to °C: 25 × 1 + -273.15 = -248.15 °C.
Kelvin to Celsius conversion table
| Kelvin (K) | Celsius (°C) |
|---|---|
| 1 K | -272.15 °C |
| 2 K | -271.15 °C |
| 3 K | -270.15 °C |
| 5 K | -268.15 °C |
| 10 K | -263.15 °C |
| 20 K | -253.15 °C |
| 25 K | -248.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
Popular kelvin to celsius conversions
Quick answers for the K values people look up most often:
- 4 K = -269.15 °C
- 6 K = -267.15 °C
- 7 K = -266.15 °C
- 8 K = -265.15 °C
- 9 K = -264.15 °C
- 12 K = -261.15 °C
- 15 K = -258.15 °C
- 30 K = -243.15 °C
- 40 K = -233.15 °C
- 60 K = -213.15 °C
- 75 K = -198.15 °C
- 80 K = -193.15 °C
- 90 K = -183.15 °C
- 150 K = -123.15 °C
- 200 K = -73.15 °C
- 250 K = -23.15 °C
- 500 K = 226.85 °C
- 1000 K = 726.85 °C
How to use this converter
- Enter a value in the kelvin (K) field.
- Read the converted value in celsius (°C) below.
- Type into the °C field instead to convert in reverse, or use the swap button.
Frequently asked questions
How do I convert Kelvin to Celsius?
Subtract 273.15 from the Kelvin value. C = K - 273.15.
What is 300 Kelvin in Celsius?
300 - 273.15 = 26.85 Celsius, a warm room temperature.
Why does science use Kelvin?
Kelvin starts at absolute zero, so it has no negative values and is convenient for physics and chemistry.