Kelvin to Celsius Converter
Quick answer: Kelvin to Celsius: use °C = K − 273.15. For example, 37 K is -236.15 °C.
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Use the Kelvin to Celsius Converter
Kelvin to Celsius formula and what each symbol means
°C = K − 273.15
| Symbol | Meaning |
|---|---|
| K | Kelvin |
| °C | Degree Celsius |
Kelvin to Celsius examples
0 K
0 K = -273.15 °C.
37 K
37 K = -236.15 °C.
100 K
100 K = -173.15 °C.
Kelvin compared with Celsius
The two scales have the same degree size and differ only by a fixed offset of 273.15, so the result is always shifted by that amount.
About Kelvin and Celsius
Kelvin (K): The SI base unit of thermodynamic temperature, where 0 K is absolute zero. Degree Celsius (°C): Celsius degree: 0 °C is the freezing point of water and a step of 1 °C equals 1 K.
Where Kelvin to Celsius conversions are used
Science and engineering work in kelvin, because it starts at absolute zero. Cooking, HVAC settings and lab protocols often quote the same temperature in two scales.
How to calculate Kelvin to Celsius step by step
- Enter the value in K.
- Apply the formula °C = K − 273.15.
- The result is in °C. Use the reverse formula to go back.
Popular temperature conversions
How to read your Kelvin to Celsius result
Water freezes at 0 °C, 32 °F and 273.15 K, and boils at 100 °C, 212 °F and 373.15 K at standard pressure.
| KELVIN | CELSIUS |
|---|---|
| -40 | -313.15 |
| -10 | -283.15 |
| 0 | -273.15 |
| 20 | -253.15 |
| 37 | -236.15 |
| 50 | -223.15 |
| 100 | -173.15 |
| 212 | -61.15 |
Celsius to Kelvin: quick table
| CELSIUS | KELVIN |
|---|---|
| -40 | 233.15 |
| -10 | 263.15 |
| 0 | 273.15 |
| 15 | 288.15 |
| 25 | 298.15 |
| 37 | 310.15 |
| 60 | 333.15 |
| 90 | 363.15 |
Common mistakes when calculating Kelvin to Celsius
- Converting a temperature difference with the same formula: for differences only the scale factor applies, with no offset.
- Using a single multiplier: this conversion is not a simple scale, so follow the full formula °C = K − 273.15.
Kelvin to Celsius FAQ
What is the formula to convert Kelvin to Celsius?
°C = K − 273.15.
What is the formula to convert Celsius to Kelvin?
K = °C + 273.15.
What is 0 K in °C?
0 K equals -273.15 °C.
What is a degree Celsius (°C)?
Celsius degree: 0 °C is the freezing point of water and a step of 1 °C equals 1 K.
How can I estimate Kelvin to Celsius in my head?
The two scales have the same degree size and differ only by a fixed offset of 273.15, so the result is always shifted by that amount.
What is -10 K in Celsius?
-10 K = -283.15 °C, using °C = K − 273.15.
What is 60 K in Celsius?
60 K = -213.15 °C, using °C = K − 273.15.
What is 30 K in Celsius?
30 K = -243.15 °C, using °C = K − 273.15.
How many decimals should I keep when converting K to °C?
Match the precision of your original measurement. For example, -236.15 °C rounds to -236 °C at 3 significant figures; keep more digits only for engineering or scientific work.
More in Temperature converters
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the kelvin