A numbered scale (1/4, 1/2, 1 through 9) used on British gas ovens. Gas Mark 1 ≈ 275°F / 140°C. Each step up adds roughly 25°F / 15°C. Older UK recipes often only quote Gas Mark, so conversion is essential when baking from British cookbooks.

Should I reduce fan oven temperatures?

Yes — fan (convection) ovens cook faster because circulating air transfers heat more efficiently. Most guides say subtract 20°C / 35°F from a conventional recipe temperature when using a fan oven, or reduce cooking time by 10–15%.

Why are oven temperatures rounded to 25°F / 10°C increments?

Home oven thermostats are typically accurate to ±15°F, so recipes round to the nearest 25°F (conventional US) or 10°C (metric). Small deviations don't meaningfully affect outcomes — ingredient ratios and bake time matter far more than hitting an exact temperature.

Oven Temperature Converter (F, C, Gas Mark)

Cooking & Kitchen· 5 tools

Free oven temperature converter. Switch any oven temperature between Fahrenheit (°F), Celsius (°C), and UK Gas Mark (1–9). Common baking and roasting temperatures — 350°F for cookies, 425°F for bread, 450°F for pizza — are mapped to their Celsius and Gas Mark equivalents in a quick-reference table below the converter.

Temperature

Scale

Fahrenheit

350°F

Celsius

177°C

Gas Mark (UK)

Common baking temperatures

Slow cook / stew275°F135°CGas 1

Yogurt / proofing bread110°F43°CGas <¼

Cookies350°F177°CGas 4

Cakes350°F177°CGas 4

Quick breads / muffins375°F191°CGas 5

Bread (crusty loaf)425°F218°CGas 7

Roast chicken425°F218°CGas 7

Roast vegetables425°F218°CGas 7

Pizza (home oven)475°F246°CGas 9

Broil (max)550°F288°CGas >9

Using a fan / convection oven? Subtract ~20°C (35°F) from the conventional temp or reduce bake time by 10–15%.

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