Kelvin to Celsius Converter

About K → °C

Scientific data tables often list temperatures in Kelvin. Converting K to C subtracts 273.15 to express familiar Celsius offsets.

Useful when interpreting stellar temperatures or cryogenic storage labeled in K.

Direction: Kelvin input to Celsius output.

How to use this tool

Input Kelvin. Calculate for Celsius.

Formula & methodology

This kelvin to celsius converter applies the standard relationship below. Intermediate values are kept at full precision; only the displayed result is rounded.

C = K - 273.15

Tips for accurate results

• Negative Celsius is normal; Kelvin below 273.15 corresponds to below freezing C.
• Do not say degrees Kelvin—Kelvin is absolute.
• Reverse: c-to-k.
• Check significant figures in lab reports.

Frequently asked questions

Sources & references

The factors and formulas used by this tool follow these references:

• NIST Special Publication 811 — Guide for the Use of the International System of Units (SI)
• BIPM — The International System of Units (SI Brochure, 9th edition)

Last reviewed: September 2026. Found an error? Tell us and we will correct it.