Celsius vs Fahrenheit in Cooking
US recipes use **Fahrenheit**; much of the world uses **Celsius**. Fan ovens need **lower temps or shorter times** than conventional settings.
Step by step
1. Convert exactly
°F = °C × 9/5 + 32 for oven dial settings.
2. Fan adjustment
Reduce ~20°C (25°F) or time ~10% for convection.
3. Use a thermometer
Oven dials are often off 25°F/15°C.
°C vs °F
Memorize anchors: 350°F ≈ 175°C, 400°F ≈ 200°C.
- Celsius: Metric recipes; finer steps for candy.
- Fahrenheit: US packaging; wider dial spacing.
Use our calculators
Common mistakes
- Forgetting fan-forced adjustment
- Rounding conversions on delicate bakes
FAQ
Is 180°C fan same as 180°C conventional?
No—fan is hotter effective heat; lower the setpoint.