Why does the US use Fahrenheit?

The Fahrenheit scale was already entrenched when the US standardized its measurements, and a switch to Celsius never gained enough public support to stick.

What is absolute zero?

Absolute zero is 0 Kelvin, equal to -273.15°C or -459.67°F — the lowest possible temperature, where molecular motion stops.

Kelvin to Celsius converter

Convert kelvin (K) to celsius (°C) — results update instantly as you type.

Kelvin to Celsius

From

To-272.15

1 K = -272.15 °C

PrecisionScientific notation

How to convert Kelvin to Celsius

Temperature is measured on three main scales: Celsius (used worldwide), Fahrenheit (used in the United States), and Kelvin (used in science). Unlike most conversions, temperature uses an offset as well as a multiplier.

Fahrenheit to Celsius: subtract 32, then multiply by 5/9. Celsius to Kelvin: add 273.15. The scales intersect at -40°, where -40°C equals -40°F.

Formula

K × -272.15 = °C

Multiply your kelvin value by -272.15 to get celsius. For the reverse, divide by the same factor.

Kelvin to Celsius conversion table

Kelvin	Celsius
1 K	-272.15 °C
2 K	-271.15 °C
5 K	-268.15 °C
10 K	-263.15 °C
25 K	-248.15 °C
100 K	-173.15 °C

Common use cases

Weather forecasts between Celsius and Fahrenheit
Oven temperatures for international recipes
Scientific calculations requiring Kelvin
Body temperature interpretation (37°C = 98.6°F)

Frequently asked questions

Double the Celsius value and add 30 for a close estimate. The exact formula is °F = °C × 9/5 + 32.

Kelvin to Fahrenheit