Kelvin to Celsius
Convert Kelvin to Celsius.
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Example
300 K − 273.15 = 26.85 °C.
How it works
Kelvin and Celsius use the same sized degree steps, but they start from different zero points. Celsius sets 0 0b0C at the freezing point of water, while Kelvin starts at absolute zero, the lowest possible temperature, which is 273.15 degrees lower on the scale. That is why you convert Kelvin to Celsius by subtracting 273.15.
When to use it
Use this formula when a temperature is given in Kelvin and you need it in Celsius for science class, lab work, or everyday temperature comparisons. It is especially common in chemistry, physics, and weather-related calculations.
Worked example, step by step
Given: 310.5 K Step 1: Write the conversion formula: b0C = K - 273.15 Step 2: Substitute the value: b0C = 310.5 - 273.15 Step 3: Subtract: b0C = 37.35 Final answer: 310.5 K = 37.35 b0C
Common mistakes to avoid
- Subtracting 273 instead of 273.15
- Adding 273.15 instead of subtracting it
- Forgetting that Kelvin and Celsius have the same size increments, so only the offset changes
Did You Know?
Kelvin uses no degree symbol — it's the SI base unit of temperature, named for Lord Kelvin.
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