Oven Temperature Converter

Convert a temperature

Full conversion table

Gas Mark values are the standard published pairings for conventional ovens. Individual ovens run hot or cold by 10–25 degrees either way regardless of what the dial says — an oven thermometer is the only exact answer.

How it works

Fahrenheit and Celsius convert with the exact formula °C = (°F − 32) × 5/9. Gas Mark is not a formula at all — it is a stepped dial scale used on British gas ovens, so conversions go through the standard table above: enter a Gas Mark and you get the table's paired °F and °C; enter °F or °C and you get the nearest Gas Mark, shown with a "≈" when it is not an exact table pairing. Each Gas Mark step is roughly 25 °F (about 10–20 °C, widening at the hot end).

Fan (convection) ovens: the usual guidance is to set a fan oven about 20 °C lower than the conventional temperature a recipe gives (roughly 25 °F lower), because the fan moves hot air onto the food more effectively. That is a rule of thumb, not an exact conversion — the fan figure shown here applies it and labels it guidance. When a recipe gives its own fan temperature, use the recipe's.

Frequently asked questions

What is 350 °F in Celsius and Gas Mark? 350 °F = 176.7 °C exactly by formula, listed as 180 °C in the standard Gas Mark table (Gas Mark 4) — the small gap is rounding in the published table, and ovens cannot hold the difference anyway.

What Gas Mark is 180 °C? Gas Mark 4 — the standard pairing for 180 °C / 350 °F, the most common baking temperature in modern recipes.

Do I always reduce for a fan oven? Most modern recipes written for fan ovens already account for it. Reduce by about 20 °C only when converting a recipe that assumes a conventional (non-fan) oven — and check food a few minutes early, since fan ovens also tend to cook slightly faster.