Free Temperature Converter

Kelvin to Celsius Converter

Convert Kelvin to Celsius instantly using the formula °C = K − 273.15. Enter any Kelvin value below to get the Celsius result, step-by-step formula, and reference examples.

0 K = −273.15°C 273.15 K = 0°C 310.15 K = 37°C 373.15 K = 100°C
Celsius
0 °C
Freezing point
Formula:
°C = K − 273.15
273.15 − 273.15 = 0°C
0 K = −273.15°C
Absolute zero
273.15 K = 0°C
Water freezes
310.15 K = 37°C
Human body temp
373.15 K = 100°C
Water boils
Reference

Kelvin to Celsius Conversion Table

Need a quick reference without using our Kelvin to Celsius calculator? Use this chart to find common temperature values from absolute zero to high-heat scientific benchmarks.

Kelvin (K) Celsius (°C)
0 K −273.15°C
77.15 K −196°C
233.15 K −40°C
253.15 K −20°C
273.15 K 0°C
293.15 K 20°C
298.15 K 25°C
310.15 K 37°C
323.15 K 50°C
333.15 K 60°C
373.15 K 100°C
473.15 K 200°C
1273.15 K 1000°C
5778.15 K 5505°C
The Math

The Kelvin to Celsius Conversion Formula

°C = K − 273.15

If you need to know how to calculate Celsius from Kelvin, the process is direct because Kelvin and Celsius use the same interval size. You only subtract 273.15 from the Kelvin value.

Kelvin starts at absolute zero. Celsius starts 273.15 units higher, where 0°C equals 273.15 K. That fixed offset is why the conversion does not need multiplication or division.

Worked Examples

Room Temperature
293.15 − 273.15 = 20°C
Comfortable Indoor Climate
295.15 − 273.15 = 22°C
Scientific Standard
298.15 − 273.15 = 25°C
Body Temperature
310.15 − 273.15 = 37°C
Boiling Water
373.15 − 273.15 = 100°C

Reverse Operation

K = °C + 273.15

Working backward? Add 273.15 to your Celsius value, or use our dedicated Celsius to Kelvin Converter →.

Step by Step

How to Convert Kelvin to Celsius

Wondering how do we convert Kelvin to Celsius manually? Follow this simple guide.

1
Identify your starting temperature in Kelvin.
Example: 298.15 K
2
Apply the formula. Subtract 273.15 from that Kelvin value.
298.15 − 273.15 = 25
3
Record your final result.
Answer: 25°C
Background

Understanding the Kelvin to Celsius Scale

Kelvin (K) is an absolute temperature scale used heavily in science, engineering, physics, chemistry, and astronomy. Its zero point is absolute zero, the lowest theoretical temperature.

Celsius is more common for weather, cooking, and everyday use. The two scales move in equal steps, so converting Kelvin to Celsius only requires shifting the starting point by 273.15.

Extended Reference

Extended Conversion Chart

Browse common Kelvin to Celsius values. Click any pair to load it into the converter above.

0 K−273.15°C
77.15 K−196°C
233.15 K−40°C
253.15 K−20°C
263.15 K−10°C
273.15 K0°C
283.15 K10°C
288.15 K15°C
293.15 K20°C
294.15 K21°C
295.15 K22°C
296.15 K23°C
298.15 K25°C
300.15 K27°C
303.15 K30°C
310.15 K37°C
313.15 K40°C
323.15 K50°C
333.15 K60°C
343.15 K70°C
353.15 K80°C
363.15 K90°C
373.15 K100°C
423.15 K150°C
473.15 K200°C
FAQ

Kelvin to Celsius FAQs

Use °C = K − 273.15. This is the exact Kelvin to Celsius conversion formula used to convert Kelvin to degrees Celsius, also written as K to °C.
Write the Kelvin value, subtract 273.15, and the result is Celsius. Formula: °C = K − 273.15. This is the standard K to C conversion.
To change Kelvin to Celsius, subtract 273.15 from the Kelvin value. Example: 300 K − 273.15 = 26.85°C.
0 K = −273.15°C. This is absolute zero.
100 K = −173.15°C. Calculation: 100 − 273.15 = −173.15°C.
273 K = −0.15°C. Calculation: 273 − 273.15 = −0.15°C. 273.15 K = 0°C, which is the freezing point of water on the Celsius scale.
300 K = 26.85°C. Calculation: 300 − 273.15 = 26.85°C.
Kelvin is written as K, not °K. People may say “degree Kelvin,” but the correct unit is kelvin. This does not change the Kelvin to degree Celsius conversion formula.

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Celsius to Fahrenheit Fahrenheit to Celsius Celsius to Kelvin Fahrenheit to Kelvin Kelvin to Fahrenheit