Celsius to Fahrenheit
170°C to Fahrenheit
170°C is 338°F, between Gas Mark 3 and 4. In a fan oven, use 150°C.
170 degrees Celsius equals
338°F
Nearest US oven setting: 350°F
What 170°C is used for
Moderate oven
170°C falls between Gas Mark 3 and Gas Mark 4, and older recipes often treat it as Gas Mark 3. It is a very common fan-oven setting: 170°C fan is the same as 190°C in a conventional oven.
Typical uses at this heat: sponge cakes, cupcakes, brownies, biscuits.
Not sure your oven really reaches 170°C? Many ovens run hotter or cooler than the dial. See how to check your oven’s temperature.
How to convert 170°C to °F
Multiply by 9, divide by 5, then add 32:
306 + 32 = 338°F
The quick “double it and add 30” trick gives 370°F, which is 32°F too high at this temperature. That’s fine for weather but not for baking, so use the exact figure.
170°C in different ovens
| Oven type | Setting |
|---|---|
| Conventional (top and bottom heat) | 170°C / 338°F |
| Fan oven | 150°C |
| US convection oven | 315°F |
| Gas oven | Between 3 and 4 |
| Air fryer | 155°C / 315°F |
Convert another temperature
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Nearby temperatures
| Celsius | Fahrenheit | Gas Mark | Fan oven |
|---|---|---|---|
| 130°C | 266°F | Between ½ and 1 | 110°C |
| 140°C | 284°F | Gas Mark 1 | 120°C |
| 150°C | 302°F | Gas Mark 2 | 130°C |
| 160°C | 320°F | Gas Mark 3 | 140°C |
| 170°C | 338°F | Between 3 and 4 | 150°C |
| 180°C | 356°F | Gas Mark 4 | 160°C |
| 190°C | 374°F | Gas Mark 5 | 170°C |
| 200°C | 392°F | Gas Mark 6 | 180°C |
| 210°C | 410°F | Between 6 and 7 | 190°C |
Common questions
What is 170°C in Fahrenheit?
170°C is 338°F. On a US oven dial, use 350°F.
What Gas Mark is 170°C?
170°C is between Gas Mark 3 and 4. Use the nearer mark and check the food a little early.
What is 170°C in a fan oven?
Use 150°C in a fan oven. Fan ovens circulate hot air, so UK recipes reduce the conventional temperature by 20°C. If your recipe already says “170°C fan”, don’t reduce it again.
Is 170°C hot?
170°C counts as a moderate oven. Typical uses: sponge cakes, cupcakes, brownies, biscuits.
More Celsius conversions
Going the other way? See 350°F to °C and the other Fahrenheit conversions.