# Convert Kelvin to Celsius Temperature Kelvin and Celsius are two temperature scales. The size of the "degree" for each scale is the same magnitude, but the Kelvin scale starts at absolute zero (the lowest temperature theoretically attainable), while the Celsius scale sets its zero point at the triple point of water (the point at which water can exist in solid, liquid, or gaseous states, or 32.01°F).

Because Kelvin is an absolute scale, no degree symbol is used following a measurement. Otherwise, the two scales are alike. Converting between them only requires basic arithmetic.

### Key Takeaways: Kelvin to Celsius Temperature Conversion

• The equation to convert between Kelvin and Celsius is: °C = K - 273.15
• Celsius temperature have a degree symbol while those reported in Kelvin do not.
• While the size of the degree is the same between Kelvin and Celsius, there is no point at which the two scales are equal. A Celsius temperature will always be higher than Kelvin.
• Celsius temperatures can be negative. Kelvin goes down to absolute zero (no negative temperature).

### Conversion Formula

Here is the formula to convert Kelvin into Celsius:

°C = K - 273.15

All that is needed to convert Kelvin to Celsius is one simple step.

Take your Kelvin temperature and subtract 273.15. Your answer will be in Celsius. While there is no degree symbol for Kelvin, you need to add the symbol to report a Celsius temperature.

### Example

How many degrees Celsius is 500K?

°C = K - 273.15
°C = 500 - 273.15
°C = 226.85°

For another example, convert normal body temperature from Kelvin to Celsius. Human body temperature is 310.15 K. Put the value into the equation to solve for degrees Celsius:

°C = K - 273.15
°C = 310.15 - 273.15
human body temperature = 37°C

### Reverse Conversion: Celsius to Kelvin

Similarly, it's easy to convert a Celsius temperature to the Kelvin scale. You can either use the formula given above or use:

K = °C + 273.15

For example, convert the boiling point of water to Kelvin. The boiling point of water is 100°C. Plug the value into the formula:

K = 100 + 273.15 (drop the degree)
K = 373.15