°F = °C × 9/5 + 32. Type in either box — the other converts instantly, in both directions.
Temperature is the one conversion that isn't just multiplication — the two scales start at different zero points, so there's an extra +32 step.
| Celsius | Fahrenheit | Good to know |
|---|---|---|
| −40 °C | −40 °F | The scales meet! |
| 0 °C | 32 °F | Water freezes |
| 10 °C | 50 °F | Jacket weather |
| 20 °C | 68 °F | Room temperature |
| 30 °C | 86 °F | Beach day |
| 37 °C | 98.6 °F | Body temperature |
| 39 °C | 102.2 °F | Fever — see a doctor |
| 100 °C | 212 °F | Water boils |
| 180 °C | 356 °F | Standard baking oven |
| 220 °C | 428 °F | Hot oven (pizza, roasting) |
Weather forecasts when traveling (the US uses °F; nearly everyone else uses °C), reading a thermometer when someone's sick, and baking — American recipes give oven temperatures in Fahrenheit, European ones in Celsius. Getting the oven conversion wrong is how cookies become charcoal, so the table above earns its keep.