Convert kelvins to degrees Celsius

1 K=-272.15°C

Use the converter below to change any kelvins value into degrees Celsius instantly — with formula, conversion table, and real-world examples.

You have

Equals

-272.15

Conversion formula

Forward

°C = K − 273.15

Reverse

K = °C + 273.15

These temperature formulas are exact — no approximation involved.

About both units

From

Kelvin

The kelvin is the SI base unit of thermodynamic temperature. Its zero point is absolute zero — the theoretical coldest possible temperature. Water freezes at 273.15 K and boils at 373.15 K. Note: there is no "degree" symbol with kelvin, only "K".

Real-world: Room temperature ≈ 293 K. Water boils at 373 K. The Sun's surface is 5778 K. Deep space is about 2.7 K.

Read full kelvin reference →

Celsius

°C

The Celsius scale defines 0 °C as the freezing point of water and 100 °C as the boiling point at standard atmospheric pressure. Proposed by Anders Celsius in 1742, it is the everyday temperature unit in all countries except the US, Belize, the Bahamas, the Cayman Islands and Liberia.

Real-world: Room temperature is about 20 °C. Normal body temperature is 37 °C. Typical fridge setting is 4 °C. European winter can reach −20 °C; desert summer 45+ °C.

Read full celsius reference →

Kelvin to Celsius conversion table

Common kelvins to degrees Celsius values for quick reference.

Kelvin (K)	Celsius (°C)
-40 K	-313.15 °C
-20 K	-293.15 °C
0 K	-273.15 °C
10 K	-263.15 °C
20 K	-253.15 °C
25 K	-248.15 °C
30 K	-243.15 °C
37 K	-236.15 °C
100 K	-173.15 °C
200 K	-73.15 °C

Tips & common mistakes

Quick tips

K = °C + 273.15. Identical degree size; only the zero point differs.
There are no "degrees Kelvin" — just "kelvins". The symbol is K, not °K.
Colour temperature: 3000 K warm/yellow; 5000 K daylight; 6500+ K cool/blue.

Avoid these

Writing °K — incorrect. Kelvin uses no degree symbol.
Trying to use negative Kelvin values — impossible physically.
Confusing "kelvin" (unit) with "Kelvin" (the scientist William Thomson).

Frequently asked questions

How many degrees Celsius in a kelvin?

One kelvin equals -272.15 degrees Celsius.

How do I convert kelvins to degrees Celsius?

Temperature conversion is non-linear. From Kelvin to Celsius use the specific formula — this tool applies it automatically.

What is 100 kelvins in degrees Celsius?

100 kelvins equals -173.15 degrees Celsius.

Is a kelvin bigger than a celsius?

Temperature units compare by scale, not by size of one degree. Kelvin and Celsius use different zero points.

How to convert kelvins to degrees Celsius without a calculator?

Use the mental shortcut relevant to these temperature scales — but for accuracy always verify with a calculator.

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