Oven Temperature Converter
Enter a temperature in Fahrenheit to see its Celsius equivalent, UK gas mark, and general heat description.
How oven temperature conversion works
Converting Fahrenheit to Celsius uses the formula °C = (°F − 32) × 5/9. UK gas mark is a separate numbering system (1 through 9, plus 1/4 and 1/2 for low settings) that doesn't follow a simple formula, so this calculator matches your temperature to the closest standard gas mark setting.
General heat descriptions — low, moderate, hot, very hot — are a rough practical guide many recipes use alongside exact temperatures, roughly corresponding to below 300°F, 300–375°F, 375–425°F, and above 425°F respectively.
Frequently asked questions
Why isn't gas mark a simple formula like Celsius?
UK gas mark is a standardized but non-linear scale — the gap between some marks is 10°C and others 20°C — so it's defined by a lookup table of standard settings rather than a mathematical conversion.
What temperature is "moderate" in a recipe?
Moderate generally means roughly 350°F (180°C, gas mark 4) — a common baking temperature for cakes, cookies, and many everyday dishes.
Does fan/convection oven temperature need adjustment?
Yes — this calculator converts the stated recipe temperature between scales, but many recipes are written for conventional ovens. Convection/fan ovens often need the temperature reduced by about 20°C (25°F) or so, per your oven manufacturer's guidance.