170 °C to Fahrenheit
338 °F
Exact conversion
325 °F
Set your oven to this
No oven dial has a 338 °F mark. Recipes treat 170 °C and 325 °F as the same setting — gas mark 3 — and the gap between them is smaller than the swing of a domestic thermostat. Set a fan-forced oven to 150 °C.
170 °C is the temperature for sponge cakes that need a long even rise, for custard tarts and for slow-roasted joints. It is gentle enough to avoid a domed, cracked top but hot enough to set a batter in reasonable time.
170 °C conversion table
| Exact conversion | 338 °F |
| Oven dial setting | 325 °F |
| Fan-forced (convection) | 150 °C |
| Gas mark | 3 — moderate |
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= 356 °F
Frequently asked questions
What is 170 °C in Fahrenheit?
170 °C is exactly 338 °F. As an oven setting, use 325 °F — the dial mark recipes mean, which is gas mark 3. In a fan oven, set 150 °C.
What is 170 °C in Fahrenheit?
Exactly 338 °F. As an oven setting, use 340 °F if your dial allows it, or 325 °F for a slightly gentler bake and 350 °F for a slightly faster one.
What is 170 °C in a fan oven?
Set a fan oven to 150 °C.
Why does 170 °C not match a standard US oven mark?
US ovens are marked in 25 °F steps, and 170 °C lands at 338 °F — between the 325 °F and 350 °F marks. Most converted recipes round up to 350 °F and shorten the bake slightly.