Oven temperature conversion is one of the most common reasons people look up temperature units. Recipes travel globally, but ovens and cookbooks still speak different languages:
- US recipes usually use Fahrenheit
- most international recipes use Celsius
- some older cookbooks also mention gas marks
If you want the calculator, use Fahrenheit to Celsius, Celsius to Fahrenheit, or the full temperature converter.
The Temperatures People Actually Need
| Fahrenheit | Celsius | Typical Use |
|---|---|---|
| 275°F | 135°C | low and slow baking |
| 300°F | 150°C | gentle baking |
| 325°F | 165°C | cookies, casseroles |
| 350°F | 175-180°C | standard baking |
| 375°F | 190°C | pies, roasting |
| 400°F | 200-205°C | roasting, sheet-pan cooking |
| 425°F | 220°C | crisp roasting |
| 450°F | 230°C | pizza, very hot roasting |
The Exact Formula
To convert Fahrenheit to Celsius:
(°F - 32) × 5/9
Example:
(350 - 32) × 5/9 = 176.7°C
That is why most recipe charts round 350°F to 175°C or 180°C.
Why Recipes Round the Numbers
Ovens are not perfect instruments. Real ovens fluctuate during baking, and most home cooks do not need decimal precision. In practice:
- 350°F is commonly treated as 175°C or 180°C
- 400°F is commonly treated as 200°C
The rounded number is usually the right one to use in the kitchen.
A Good Mental Shortcut
For a rough estimate:
- subtract 30
- divide by 2
So:
400°F -> (400 - 30) / 2 = 185°C
That shortcut is not exact, but it gets you in the neighborhood quickly.
Standard Baking Reference Points
- 325°F is a bit cooler than standard cake and cookie baking
- 350°F is the classic “moderate oven”
- 375°F is a little hotter and common for pies
- 400°F and above is where roasting gets more aggressive
When Exact Conversion Matters More
Use the exact formula or converter when:
- baking delicate pastries
- following professional baking formulas
- working with small-batch test recipes
- troubleshooting underbaked or overbaked results
For everything else, the rounded kitchen values are usually enough.
If a recipe switches between metric and US measurements, you may also need the kitchen conversion guide or cups to grams baking guide.