Fahrenheit to Celsius
Convert °F to °C — subtract 32, multiply by 5/9. Instant converter with weather and oven tables.
Fast, easy and free — your answer appears as you type, and whatever you enter stays on your device.
To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9: 68 °F is 20 °C. Type any temperature below, or read the table for the figures American life throws at you.
How to use it
- Type the fahrenheit valueThe celsius answer appears as you type — no button to press.
- Or go the other waySwap flips the direction to celsius → fahrenheit in one tap.
- Check the workingThe exact factor or formula used is shown beneath the answer, so the result is checkable, not just asserted.
Fahrenheit to Celsius — weather, body, oven
| °F | °C |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.78 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 77 °F | 25 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.78 °C |
| 212 °F | 100 °C |
| 350 °F | 176.7 °C |
| 400 °F | 204.4 °C |
| 425 °F | 218.3 °C |
The quick rule for your head
Subtract 32, then halve and add 10% of the half: 86 °F → 54 → 27 + 2.7… call it 30 °C (exact: 30). For fast weather intuition, learn the pairs instead of computing: 50 °F is cool (10 °C), 68 is room (20), 86 is hot (30), 104 is heatwave (40). Every 18 °F is a clean 10 °C step.
Where this conversion shows up
American weather reports, oven dials and hot-tub manuals all arrive in Fahrenheit; the rest of the world needs them in Celsius before they mean anything. Travellers to the US hit it hourly, and anyone using American recipes converts 350 °F to 175 °C so often it eventually memorises itself.
Need other units too? The fulltemperature converter handles every pair and shows the exact factor behind each answer. For the opposite direction, use Celsius to Fahrenheit.
Questions people ask
What is the Fahrenheit to Celsius formula?
°C = (°F − 32) × 5/9. Subtract the offset first — the classic error is multiplying before subtracting, which lands 17.8 °C too high.
What is 100 °F in Celsius?
37.8 °C — body-heat weather. When a US forecast crosses 100 °F, that is a 38 °C day in metric terms.
Why is 0 °F so cold?
Fahrenheit set his zero at the coldest brine mixture he could reproduce — about −17.8 °C. It makes 0 °F a genuinely brutal temperature, where 0 °C is just frost.
What is 425 °F in Celsius for an oven?
218 °C — recipes and dials round to 220. The full oven ladder runs 325/160, 350/175, 375/190, 400/200, 425/220.