Temperature converter

What the result means

Temperature conversion is not a simple multiply. Celsius and Kelvin share a degree size and differ by 273.15. Fahrenheit uses a different degree and a different zero.

How it is calculated

°F = °C × 9/5 + 32. K = °C + 273.15

• °C: Celsius.
• °F: Fahrenheit.
• K: Kelvin.

Convert any input into Celsius first, then into the target scale. That avoids chaining Fahrenheit and Kelvin formulas in the wrong order.

Worked example

A 22 °C room in Fahrenheit

An indoor thermostat shows 22 °C.

Fahrenheit

22 × 9/5 + 32 = 71.6 °F

Kelvin

22 + 273.15 = 295.15 K

A comfortable 22 °C room is about 72 °F, not 22 °F.

Australia uses Celsius

BOM forecasts, ovens and most thermostats are Celsius. A 40 °C day is a severe heatwave, not a mild 40 °F afternoon (which is about 4 °C).

Kelvin is the SI thermodynamic scale, used in science. 0 K is absolute zero. Room temperature is about 295 K.

Questions