Celsius to Fahrenheit Converter

°C to °F chart

How to convert Celsius to Fahrenheit

Multiply the Celsius temperature by 9/5 (or 1.8) and add 32. So 20 °C × 1.8 = 36, and 36 + 32 = 68 °F. To go the other way, subtract 32 and multiply by 5/9: 68 °F − 32 = 36, × 5/9 = 20 °C. Swap the units in the converter above with ⇄ to convert Fahrenheit to Celsius.

Quick mental shortcut

Double the Celsius number and add 30. It is close enough for weather: 10 °C ≈ 50 °F (exact 50), 20 °C ≈ 70 °F (exact 68), 30 °C ≈ 90 °F (exact 86). The shortcut becomes less accurate for high temperatures, so use the exact formula for cooking and medical readings.

Reference temperatures

• Water freezes: 0 °C = 32 °F
• Room temperature: 20–22 °C = 68–72 °F
• Normal body temperature: about 37 °C = 98.6 °F; a fever starts around 38 °C = 100.4 °F
• Hot summer day: 35 °C = 95 °F
• Water boils (at sea level): 100 °C = 212 °F
• Moderate oven: 180 °C = 356 °F (often written as 350 °F)

Who uses Fahrenheit?

The United States and a few territories and countries such as the Bahamas, the Cayman Islands and Liberia use Fahrenheit for everyday temperatures. Almost everywhere else uses Celsius, which is also the standard in science. That is why recipes, weather forecasts and thermometer readings often need converting when you travel or follow instructions from abroad.

Oven temperatures

Recipes from the US list oven temperatures in Fahrenheit, while most other countries use Celsius or gas marks. Common settings: 150 °C ≈ 300 °F (Gas 2), 160 °C ≈ 325 °F (Gas 3), 180 °C ≈ 350 °F (Gas 4), 200 °C ≈ 400 °F (Gas 6), 220 °C ≈ 425 °F (Gas 7). Fan ovens usually need about 20 °C less than the recipe states.