اوون ٹمپریچر کنورٹر (°F، °C، گیس مارک، فین)

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Everything is normalised to Celsius first. A Fahrenheit entry becomes (°F − 32) × 5/9, a Celsius entry passes straight through, and a Gas Mark entry is looked up in a fixed table where mark 1 is 140°C, 4 is 180°C and each step above adds 10°C to a maximum of 240°C at mark 9. The tool then converts back with °C × 9/5 + 32, picks whichever gas mark sits closest in Celsius, and labels the result with a description band from very cool up to searing.

The From selector decides how your number is read, and the eight presets from 200°F up to 500°F all switch it back to Fahrenheit. Oven type controls the headline figure while the separate Fan-forced line always reports your temperature minus 20°C, which is the number to use if your oven has a fan. The two reference tables below are static: gas mark equivalents on one, and safe or preferred internal meat temperatures on the other.

Fan compensation is a flat 20°C at every setting, so it is proportionally severe at low temperatures — a fifth off a 110°C dehydrate, but under a tenth off a 240°C roast. Note that 20°C is a 36°F difference, not the 40°F often quoted. Gas marks snap to the nearest whole entry, so intermediate temperatures round by up to 5°C, and nothing here corrects for altitude or for the fact that most domestic ovens run 10–15°C away from their dial.

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