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180 °C = 356 °F = gas mark 4 — the row most recipes live on. The full chart below pairs every common oven setting in Celsius, Fahrenheit and gas mark. Fahrenheit figures are exact conversions (°F = °C × 9/5 + 32), not rounded recipe conventions.
| Gas Mark | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| ¼ | 110 °C | 230 °F |
| ½ | 120 °C | 248 °F |
| 1 | 140 °C | 284 °F |
| 2 | 150 °C | 302 °F |
| 3 | 160 °C | 320 °F |
| 4 | 180 °C | 356 °F |
| 5 | 190 °C | 374 °F |
| 6 | 200 °C | 392 °F |
| 7 | 220 °C | 428 °F |
| 8 | 230 °C | 446 °F |
| 9 | 240 °C | 464 °F |
US recipes round. A US recipe that says 350 °F almost always means the 180 °C setting — even though 180 °C converts to exactly 356 °F and 350 °F converts back to 176.7 °C. Oven dials step in round numbers in both systems, so the pairing 350 °F ↔ 180 °C ↔ gas mark 4 is the one to remember.
Fan ovens run lower. As a general rule of thumb, a fan (convection) oven should be set about 20 °C below the conventional temperature in the chart — so a 180 °C recipe becomes roughly 160 °C fan. Treat that as guidance, not a conversion: oven manuals differ.
Gas marks are a British scale. Gas mark 1 is 140 °C and each whole mark adds roughly 14 °C (25 °F). The scale survives in UK recipes and on older gas ovens; the chart above covers the marks recipes actually use, from ¼ to 9.
British and metric recipes pair these oven temperatures with gram weights — 1 cup of all-purpose flour is 120 g, granulated sugar 198 g, butter 227 g. The cups to grams converter covers eight staple ingredients in both directions.
If your recipe stays in volumes, these converters handle the metric side — a US cup is about 237 ml, a tablespoon about 15 ml:
180 °C is exactly 356 °F and gas mark 4 — the standard moderate oven for cakes and cookies. US recipes usually print 350 °F for the same setting; that is a rounding convention, not the exact conversion.
200 °C is gas mark 6 and exactly 392 °F — a fairly hot oven, typical for roasting vegetables and baking bread.
350 °F is 176.7 °C — closest to the 180 °C / gas mark 4 chart row, which is why US recipes pair 350 °F with 180 °C even though 180 °C converts to exactly 356 °F.
No — as a general rule of thumb, set a fan (convection) oven about 20 °C lower than the conventional temperature in a recipe, because the fan circulates heat more efficiently. Check your oven manual for its exact guidance, and prefer an oven thermometer if yours runs hot or cold.
Browse every tool in this category on the Cooking Converter hub page.