175°C is 347°F, Gas Mark 4, and 155°C fan/convection. This is a Slow-Moderate Oven. Cookie and biscuit territory. Watch carefully — the difference between golden and burnt is just 2–3 minutes.
CELSIUS
175°C
conventional
FAHRENHEIT
347°F
US standard
GAS MARK
Gas 4
UK gas ovens
FAN / CONVECT
155°C
−20°C from conv.
💡 Fan/convection oven: set to 155°C (20°C less than conventional). Fan ovens circulate hot air for faster, more even cooking.
| °C | °F | Gas Mark | Fan °C | Oven type |
|---|---|---|---|---|
| 160°C | 320°F | Gas 3 | 140°C | Very Slow / Cool Oven |
| 165°C | 329°F | Gas 3–4 | 145°C | Very Slow Oven |
| 170°C | 338°F | Gas 3–4 | 150°C | Slow Oven |
| 175°C | 347°F | Gas 4 | 155°C | Slow-Moderate Oven |
| 180°C | 356°F | Gas 4 | 160°C | Moderate Oven |
| 185°C | 365°F | Gas 5 | 165°C | Moderate Oven |
| 190°C | 374°F | Gas 5 | 170°C | Moderately Hot Oven |
| 195°C | 383°F | Gas 6 | 175°C | Moderately Hot Oven |
| 200°C | 392°F | Gas 6 | 180°C | Hot Oven |
| 205°C | 401°F | Gas 6–7 | 185°C | Hot Oven |
| 210°C | 410°F | Gas 6–7 | 190°C | Very Hot Oven |
| 215°C | 419°F | Gas 7 | 195°C | Very Hot Oven |
| 220°C | 428°F | Gas 7 | 200°C | Very Hot Oven |
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175°C = 347°F = Gas Mark 4 = 155°C fan/convection · Fan ovens run 20°C cooler than conventional · Always preheat for at least 15 minutes