Convert degree Celsius to kelvin
Convert degrees Celsius (°C) to kelvin (K) instantly.
1 °C =
274.15 K
kelvin
Need the reverse? Convert kelvin to degree Celsius →
Formula
K = °C + 273.15
degree Celsius to kelvin conversion table
About converting degrees Celsius to kelvin
Celsius to Kelvin is a science-class and laboratory conversion. The scales share the same size of degree, so you simply add 273.15 — water freezes at 0 °C, or 273.15 K.
Method & sources
Conversions use exact legal definitions rather than rounded approximations: 1 inch = 2.54 cm and 1 pound = 0.45359237 kg (fixed by the 1959 international yard and pound agreement), 1 mile = 1.609344 km, and 1 US liquid gallon = 3.785411784 litres. Temperatures convert with °F = °C × 9⁄5 + 32 and K = °C + 273.15. Results are rounded only for display.
- NIST Special Publication 811 — Guide for the Use of the SI
- NIST Handbook 44, Appendix C — General Tables of Units of Measurement
Page last updated: October 1, 2026
Frequently asked questions
How many kelvin are in a degree Celsius?
One degree Celsius equals 274.15 kelvin. So 10 degrees Celsius is 283.15 kelvin. Use the converter above for any value.
What is the formula to convert degrees Celsius to kelvin?
K = °C + 273.15
Is the degree Celsius-to-kelvin conversion exact?
Yes. Temperature scales convert by an exact formula, not an approximation, so the result is precise for any input.
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