By Chance E. Gartneer • Updated Aug 30, 2022

If your recipe calls for baking at 400°F for 45 minutes but your oven only displays Celsius, a quick conversion will keep your cake on track.

Standard Conversion Formula

The widely accepted method is:

C = (F – 32) × 5⁄9

Where F is Fahrenheit and C is Celsius.

Step‑by‑Step for 400°F

1. Subtract 32: 400 – 32 = 368.
2. Multiply by 5: 368 × 5 = 1,840.
3. Divide by 9: 1,840 ÷ 9 ≈ 204.4.

Thus, 400°F equals approximately 204.4°C.

Remember, the 5⁄9 factor is a constant that bridges Fahrenheit and Celsius. With this simple three‑step process, you can confidently convert any oven temperature and keep your baking on schedule.