Fahrenheit to Celsius Converter
Free Fahrenheit to Celsius converter using the exact formula °C = (°F − 32) × 5/9. Instant, works both ways, no signup.
About the Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius with the exact formula °C = (°F − 32) × 5/9. Type a Fahrenheit temperature and the Celsius value appears instantly — 68 °F becomes 20 °C, 98.6 °F becomes 37 °C — and editing the Celsius field converts the other way.
Typical uses: translating a US weather forecast (a 90 °F summer day is 32.2 °C), converting American oven temperatures for a Celsius oven (350 °F = 176.7 °C, so set 175–180 °C), reading a US fever thermometer, or making sense of pool and aquarium temperatures quoted in Fahrenheit.
The reference table covers the values people look up most: freezing (32 °F), room temperature (68–77 °F), body temperature (98.6 °F), boiling (212 °F) and the standard baking range from 325 to 425 °F.
How to Use the Fahrenheit to Celsius Converter
- 1Enter a temperature in Fahrenheit — for example 350 for an oven.
- 2Read the Celsius result instantly (350 °F = 176.67 °C).
- 3Type in the Celsius field instead to convert the other way.
- 4Scan the table for weather, body and oven temperature equivalents.
Frequently Asked Questions
What is 350 °F in Celsius?
350 °F is 176.67 °C — in practice, set a Celsius oven to 175 or 180 °C. Other baking points: 325 °F = 163 °C, 375 °F = 190.6 °C, 400 °F = 204.4 °C and 425 °F = 218.3 °C.
What is 98.6 °F in Celsius?
98.6 °F is exactly 37 °C — normal body temperature. A reading of 100.4 °F equals 38 °C, the common threshold for a fever.
What is 70 degrees Fahrenheit in Celsius?
70 °F is 21.1 °C — comfortable room temperature. For weather: 50 °F = 10 °C, 80 °F = 26.7 °C and 90 °F = 32.2 °C.
How do I convert Fahrenheit to Celsius mentally?
Exact: subtract 32, then multiply by 5/9. Quick estimate: subtract 30 and halve the result — 70 °F gives (70 − 30) ÷ 2 = 20, close to the true 21.1 °C. Good enough for weather, not for cooking-critical temperatures.
Why does the Fahrenheit scale start at 32 for freezing?
Fahrenheit set 0 °F at the coldest brine mixture he could reproduce and placed water's freezing point at 32 °F. That offset is why the conversion needs a subtraction before the 5/9 ratio — it is not a simple multiplication.