Skip to content
GivenTool

Fahrenheit to Celsius (°F to °C)

Convert °F to °C with the exact formula ((°F − 32) × 5/9), plus a table of weather, body and oven temperatures.

Loading tool…

Subtract 32, then multiply by 5/9: °C = (°F − 32) × 5/9. Order matters, because the 32-degree offset has to come off before scaling. 98.6 °F is exactly 37 °C, 70 °F is 21.1 °C and 0 °F is −17.8 °C.

US recipes set ovens at 350 °F (176.7 °C, usually treated as 180 °C), 375 °F (190.6 °C) and 400 °F (204.4 °C). US weather forecasts, thermostats and fever thermometers use Fahrenheit too; the table lists the values you are most likely to meet.

How to use it

  1. Type the value in the first box; the converted value appears in the second box as you type.
  2. Or type in the second box to convert the other way.
  3. Use the Decimals menu to round, and the quick-reference table for common values.

Frequently asked questions

What is the formula for Fahrenheit to Celsius?

°C = (°F − 32) × 5/9. Example: (68 − 32) × 5/9 = 20 °C.

What is 350 °F in Celsius?

176.7 °C. Most metric recipes and ovens round it to 180 °C.

Is 100 °F a fever?

100 °F is 37.8 °C. Many health services use 100.4 °F (38 °C) as the fever threshold; ask a clinician about symptoms.

What is a quick estimate?

Subtract 30 and halve: 80 °F → 25 °C (exact 26.7). Good for weather, not for cooking.

Related tools