°F to °C Converter
The (°F − 32) × 5⁄9 direction — fevers, weather, and oven dials.
Type in either field — the other updates instantly.
°F to °C chart
| Fahrenheit | Celsius |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.78 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 86 °F | 30 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.78 °C |
| 104 °F | 40 °C |
| 212 °F | 100 °C |
| 350 °F | 176.67 °C |
| 400 °F | 204.44 °C |
| 450 °F | 232.22 °C |
Rows worth memorizing: 32 °F freezing, 98.6 °F body temperature, 212 °F boiling, 350 °F the default baking oven.
How this is calculated
°C = (°F − 32) × 5⁄9 (exact)
Reading American temperatures in metric: 98.6 °F is 37 °C on the nose, a 104 °F fever is 40 °C, a 350 °F oven is 176.7 °C, and 32 °F is freezing point exactly. Subtract 32 first, then scale — doing it in the other order is the classic error.
Both scales are defined exactly against the kelvin, so the affine formula is exact. The −40 crossover (−40 °F = −40 °C) is the built-in sanity check this converter will happily confirm.
Frequently asked questions
What is the formula for °F to °C?
Subtract 32, then multiply by 5⁄9: (°F − 32) × 5⁄9. Example: (350 − 32) × 5⁄9 = 176.7 °C for the standard baking oven.
What is a fever in Celsius?
100.4 °F — the common medical threshold — is exactly 38.0 °C. 104 °F, the see-a-doctor line for adults, is 40 °C.
Why does the mental shortcut fail?
The popular "subtract 30, halve it" gives 160 °C for a 350 °F oven (real: 176.7 °C) — a 17-degree error that ruins bakes. Shortcuts are for weather, formulas are for cooking.
Where do the scales cross?
At −40 degrees, uniquely: −40 °F = −40 °C. Type it in above and watch both fields agree — the classic converter sanity test.