Celsius to Kelvin Converter
Quick answer: Celsius to Kelvin: use K = °C + 273.15. For example, 37 °C is 310.15 K.
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Use the Celsius to Kelvin Converter
Celsius to Kelvin formula and what each symbol means
K = °C + 273.15
| Symbol | Meaning |
|---|---|
| °C | Degree Celsius |
| K | Kelvin |
Celsius to Kelvin examples
0 °C
0 °C = 273.15 K.
37 °C
37 °C = 310.15 K.
100 °C
100 °C = 373.15 K.
Celsius compared with Kelvin
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 Celsius and Kelvin
Degree Celsius (°C): Celsius degree: 0 °C is the freezing point of water and a step of 1 °C equals 1 K. Kelvin (K): The SI base unit of thermodynamic temperature, where 0 K is absolute zero.
Where Celsius to Kelvin 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 Celsius to Kelvin step by step
- Enter the value in °C.
- Apply the formula K = °C + 273.15.
- The result is in K. Use the reverse formula to go back.
Popular temperature conversions
How to read your Celsius to Kelvin 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.
| CELSIUS | KELVIN |
|---|---|
| -40 | 233.15 |
| -10 | 263.15 |
| 0 | 273.15 |
| 20 | 293.15 |
| 37 | 310.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 212 | 485.15 |
Kelvin to Celsius: quick table
| KELVIN | CELSIUS |
|---|---|
| -40 | -313.15 |
| -10 | -283.15 |
| 0 | -273.15 |
| 15 | -258.15 |
| 25 | -248.15 |
| 37 | -236.15 |
| 60 | -213.15 |
| 90 | -183.15 |
Common mistakes when calculating Celsius to Kelvin
- 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 K = °C + 273.15.
Celsius to Kelvin FAQ
What is the formula to convert Celsius to Kelvin?
K = °C + 273.15.
What is the formula to convert Kelvin to Celsius?
°C = K − 273.15.
What is 0 °C in K?
0 °C equals 273.15 K.
What is a kelvin (K)?
The SI base unit of thermodynamic temperature, where 0 K is absolute zero.
How can I estimate Celsius to Kelvin 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 25 °C in Kelvin?
25 °C = 298.15 K, using K = °C + 273.15.
What is -10 °C in Kelvin?
-10 °C = 263.15 K, using K = °C + 273.15.
What is 60 °C in Kelvin?
60 °C = 333.15 K, using K = °C + 273.15.
How many decimals should I keep when converting °C to K?
Match the precision of your original measurement. For example, 310.15 K rounds to 310 K at 3 significant figures; keep more digits only for engineering or scientific work.
More in Temperature converters
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- Rankine to Celsius Converter
- Kelvin to Fahrenheit Converter
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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