Kelvin to celsius converter
Convert kelvin to celsius with an editable calculator, worked example, formula and reference table. Check the unit definitions before you convert.
Updated · How we checkUse a decimal point, such as 2.5. Enter a temperature reading, not a temperature change.
Formula
Worked example
Convert 20 K to °C:
20 K ≈ -253.15 °C
Apply the offset and scale factor in the formula above. This converts a temperature reading; a temperature difference uses a different rule.
Kelvin to celsius table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0 | ≈ -273.15 |
| 100 | ≈ -173.15 |
| 273.15 | ≈ 0 |
| 293.15 | ≈ 20 |
| 310.15 | ≈ 37 |
| 373.15 | ≈ 100 |
Understanding kelvin
Kelvin is an absolute temperature scale. Zero kelvin is absolute zero; lower values are rejected.
Understanding celsius
Celsius uses a different zero point from Fahrenheit and Kelvin. A temperature reading is different from a temperature change.
Precision and rounding
The calculator keeps decimal precision during the conversion. Displayed values use up to 10 significant digits; an approximation sign marks the reference results. Keep extra digits until your final measurement or purchase decision.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.