How do I convert Celsius to Fahrenheit?

Multiply Celsius by 9/5 and add 32. For example, 20 °C becomes 68 °F.

What is Kelvin used for?

Kelvin is the SI temperature scale used in science and engineering. It starts at absolute zero and does not use degrees in the unit name.

Can Kelvin be negative?

No. 0 K is absolute zero, the theoretical lowest possible temperature. Anything below that is physically invalid.

Is 98.6 °F the same as 37 °C?

Yes. 98.6 °F converts to 37 °C, which is why it is often used as the classic reference for average body temperature.

Why is temperature conversion not just a simple multiplier?

Because Celsius and Fahrenheit have different zero points as well as different step sizes. Temperature conversion needs both multiplication and an offset.

CONUnit Conversion

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin instantly. Perfect for weather, cooking, science, HVAC settings, and international temperature references.

Temperature

From scale

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How It Works

Formula

T_F = T_C \times \frac{9}{5} + 32

T_C = (T_F - 32) \times \frac{5}{9}

T_K = T_C + 273.15

T_C = T_K - 273.15

Where

$T_C$: Temperature in Celsius(°C)
$T_F$: Temperature in Fahrenheit(°F)
$T_K$: Temperature in Kelvin(K)

The calculator first converts the input to Celsius as an internal reference point, then converts from Celsius into the target scale. That is why Celsius, Fahrenheit, and Kelvin all stay consistent.

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