Kelvin to Celsius Converter
Convert kelvin to degrees Celsius with the exact conversion factor, a worked example and a quick-reference table. Runs entirely in your browser.
This converter turns kelvin into degrees Celsius instantly using the standard definition of both units. It includes the formula, a worked example, and a quick table for common amounts, and it works for any value you type — including decimals and negatives where they make sense.
Quick reference — kelvin to degrees Celsius
How to use this calculator
- Enter the value in kelvin in the input box.
- Read the result in degrees Celsius — it updates as you type.
- Use the Swap button to convert in the opposite direction.
- Check the quick-reference table for common kelvin amounts.
The formula
°C = K − 273.15
Worked example
300 K = 26.85 °C — in full, 300 kelvin converts to 26.85 degrees Celsius. Weather forecasts, oven settings and science work are the everyday jobs for this conversion.
Frequently Asked Questions
How do I convert kelvin to degrees Celsius?
Use the formula °C = K − 273.15. For example, 300 K becomes 26.85 °C. The converter above applies the same formula instantly for any value you type.
What are the reference points in Kelvin and Celsius?
At standard pressure, water freezes at 273.15 K and boils at 373.15 K. In degrees Celsius those same points are 0 °C and 100 °C. Normal body temperature, 37 °C, reads 37 °C.
What is 300 kelvin in degrees Celsius?
300 kelvin is 26.85 degrees Celsius, using the formula °C = K − 273.15. The converter above applies it instantly for any value, including negative temperatures.
Why does converting kelvin to degrees Celsius need addition or subtraction?
Temperature scales do not share the same zero point, so a simple ratio is not enough — each formula combines the 9/5 (or 5/9) degree-size ratio with an offset. Kelvin is the exception that proves the rule: it starts at absolute zero (−273.15 °C), so Celsius-to-Kelvin only shifts by 273.15.