Oven Temperature Converter

Gas mark to Fahrenheit conversion isn't a formula - it's a standard lookup table, since gas mark is a fixed scale rather than a linear degree measurement. Gas Mark 4 is 350°F, Gas Mark 6 is 400°F, and Gas Mark 8 is 450°F. This calculator looks up the exact standard value when you select 'Gas Mark' and enter a number 1-9.

350°F converts to approximately 176.7°C using the exact formula C = (F - 32) x 5/9. In practice, most oven charts round this to 180°C (which also happens to be Gas Mark 4) since home ovens rarely have single-degree precision anyway.

An oven temperature conversion chart lists equivalent temperatures across Fahrenheit, Celsius, and gas mark side by side, since older UK and Irish recipes often use gas mark instead of a specific degree value. This calculator shows the full chart (Gas Mark 1 through 9, from 275°F/140°C to 475°F/240°C) below your conversion result.

Gas Mark 4 is 180°C (350°F). This is one of the most common baking temperatures, used for cakes, cookies, and general oven baking.

No - gas mark values are approximate standard equivalents, and actual temperatures can vary between oven manufacturers and models, especially between gas and electric ovens. If your food consistently over- or under-cooks at a given gas mark, it's worth using an oven thermometer to check your oven's actual internal temperature.

Use the formula F = C x 9/5 + 32. For example, 200°C converts to 200 x 9/5 + 32 = 392°F. Enter your Celsius value into this calculator and it instantly shows the Fahrenheit equivalent along with the nearest gas mark.

Fan (convection) ovens typically run 20°C (about 25°F) hotter than a conventional oven at the same setting because the fan circulates heat more efficiently. Many recipes and oven manuals recommend lowering the temperature by roughly 20°C or reducing cooking time by about 10% when using a fan setting - this calculator converts between units but doesn't adjust for fan vs. conventional, so check your recipe or oven manual for that adjustment.

425°F is approximately 218.3°C, which rounds to the standard reference value of 220°C, corresponding to Gas Mark 7. This is a common temperature for roasting vegetables and baking pizza.