Kelvin to Celsius
To convert kelvin to Celsius, subtract 273.15. The steps are the same size, so 273.15 K is 0 °C and 0 K is −273.15 °C.
°C = K − 273.15
By Piero Nanni · Last checked
Kelvin to Celsius Calculator
300K = 26.85°C
How to Convert Kelvin to Celsius
Formula:
°C = K − 273.15
Worked example:
300 − 273.15 = 26.85 °C
Kelvin to Celsius Conversion Table
| K | °C |
|---|---|
| 0 | -273.15 |
| 20 | -253.15 |
| 40 | -233.15 |
| 60 | -213.15 |
| 80 | -193.15 |
| 100 | -173.15 |
| 120 | -153.15 |
| 140 | -133.15 |
| 160 | -113.15 |
| 180 | -93.15 |
| 200 | -73.15 |
| 220 | -53.15 |
| 240 | -33.15 |
| 250 | -23.15 |
| 260 | -13.15 |
| 273.15 | 0 |
| 280 | 6.85 |
| 290 | 16.85 |
| 293.15 | 20 |
| 298.15 | 25 |
| 300 | 26.85 |
| 310 | 36.85 |
| 320 | 46.85 |
| 340 | 66.85 |
| 360 | 86.85 |
| 373.15 | 100 |
| 380 | 106.85 |
| 400 | 126.85 |
| 420 | 146.85 |
| 440 | 166.85 |
| 460 | 186.85 |
| 480 | 206.85 |
| 500 | 226.85 |
| 520 | 246.85 |
| 540 | 266.85 |
| 560 | 286.85 |
| 580 | 306.85 |
| 600 | 326.85 |
| 620 | 346.85 |
| 640 | 366.85 |
| 660 | 386.85 |
| 680 | 406.85 |
| 700 | 426.85 |
| 720 | 446.85 |
| 740 | 466.85 |
| 760 | 486.85 |
| 780 | 506.85 |
| 800 | 526.85 |
| 820 | 546.85 |
| 840 | 566.85 |
| 860 | 586.85 |
| 880 | 606.85 |
| 900 | 626.85 |
| 920 | 646.85 |
| 940 | 666.85 |
| 960 | 686.85 |
| 980 | 706.85 |
| 1000 | 726.85 |
About This Conversion
Converting kelvin back to Celsius is most often needed to sanity-check a physics or engineering result against everyday intuition: 300 K sounds abstract, 26.85 °C does not. Subtract 273.15 and the number becomes something you can feel.
The conversion also turns up when reading light-bulb specifications, though there it is a trap. A "2700 K warm white" bulb is not 2,426 °C; colour temperature describes the spectrum a blackbody would emit at that temperature, not the temperature of the bulb itself.
Frequently Asked Questions
What is 300 K in Celsius?
300 K equals 26.85 °C, a warm room temperature.
What is absolute zero in Celsius?
0 K is −273.15 °C, the point at which a system holds the minimum possible thermal energy.
Does a 2700 K light bulb get that hot?
No. Colour temperature describes the colour of the emitted light by reference to a blackbody, not the physical temperature of the lamp.
How large is one kelvin compared to one degree Celsius?
They are exactly the same size. Only the zero point differs, which is why the conversion is a simple offset.
Sources
Worth Knowing
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Converting the other way? Celsius to Kelvin
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