How do I convert Celsius to Fahrenheit?

Multiply by 9/5 and add 32. E.g. 20 °C × 1.8 + 32 = 68 °F.

What is room temperature in Fahrenheit?

About 20–22 °C, i.e. 68–72 °F.

Temperature Converter

Convert temperature from Celsius to Fahrenheit and Kelvin.

Temperature: 20.00 °C

68.0 °F

Fahrenheit

Fahrenheit	68.0 °F
Kelvin	293.15 K

ℹ️ °F = °C × 9/5 + 32. K = °C + 273.15. Absolute zero is −273.15 °C.

The temperature converter turns degrees Celsius into Fahrenheit and Kelvin with a single input. It's handy when travelling, in science work and whenever you run into a scale that isn't familiar.

How the calculator works and what it’s for▾

Conversion formulas

Fahrenheit is calculated as °F = °C × 9/5 + 32 and Kelvin as K = °C + 273.15. Kelvin is an absolute scale whose zero point, absolute zero, is −273.15 °C.

For example, 20 °C is 68 °F and about 293.15 K. The calculator converts to both scales at once.

What you enter and what you get

You enter the temperature in degrees Celsius. The result shows the equivalent value in both Fahrenheit and Kelvin.

One input is enough for two results, so you don't need separate conversions between the different scales.

What the converter is used for

Fahrenheit is common in the United States, so the converter helps you interpret their weather forecasts, oven temperatures and recipes. Kelvin, in turn, is the standard unit in physics and chemistry.

It is useful for travellers, students and anyone reading international sources.

Good to know about the scales

Celsius and Kelvin move in the same step, so a one-degree change is equal in both. The Fahrenheit scale is finer, so the same temperature difference appears as larger numbers.

In freezing weather remember the minus sign: −10 °C, for example, is 14 °F. In Kelvin the temperature cannot go below zero.

🔄 Reviewed June 2026