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Enter a temperature and its scale, then press Calculate.
From the book — Chapter 9. °F = °C × 1.8 + 32. Gas mark = (°F − 250) ÷ 25. Fan = conventional − 20 °C. Dial setting = the temperature you want − your oven's offset.
Offset = what an oven thermometer reads − what the dial says. An oven that reads 205 on a dial of 220 has an offset of −15. Everything stays in your browser — no sign-up, nothing stored.