The formula
°F = °C × 9/5 + 32. Doubling the Celsius figure and adding 32 gets you close: 180 → 360 + 32 = 392, which is 36 °F too high. Use the exact formula for oven work.
Rounding to oven dials
US ovens are marked in 25 °F steps. 180 °C = 356 °F, which you would set to 350. 200 °C = 392 °F → 400. The 6–8 °F difference is well inside a domestic oven's own ±15 °F variance.
Metric recipe to US oven
- 160 °C → 325 °F
- 180 °C → 350 °F
- 190 °C → 375 °F
- 200 °C → 400 °F
- 220 °C → 425 °F
Where people go wrong
Applying the fan-oven correction in the wrong direction. A European recipe quoting 180 °C usually means conventional; if your oven is fan-assisted, set 160 °C, then convert that to Fahrenheit if needed.
Frequently Asked Questions
What is 180 °C in Fahrenheit?
356 °F — set the dial to 350.
Is 200 °C the same as 400 °F?
392 °F, so 400 °F is the closest dial setting.
Do I convert before or after the fan adjustment?
Adjust for the fan first, then convert the unit.
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