Oven Temperature Converter
Convert oven temperatures between Fahrenheit, Celsius, and gas mark, with the rounded oven-dial setting most people actually use. A recipe written for an American oven in Fahrenheit, a European oven in Celsius, or a British oven by gas mark can all describe the same heat — this converter lines them up so you can set your oven correctly whatever the recipe assumes.
Calculate
Default result: 180
Oven Temperature Converter · Result
calculators.dev
Oven dial (°C)
350
- Exact Celsius
- 176.7
- Gas mark
- 4
Reviewed by the calculators.dev team · Last updated 2026-06-24
Formula reviewed against NIST — Fahrenheit/Celsius affine conversion; Which? / King Arthur oven-dial and gas-mark charts
How to calculate
Enter the temperature in Fahrenheit and read the Celsius value, the rounded oven-dial setting, and the gas mark. To convert by hand, subtract 32 and multiply by 5/9 for Celsius; ovens are usually set to the nearest 10°C, so 176.7°C becomes a 180°C dial. Gas marks go up by 25°F each step from gas mark 1 at 275°F.
°C = (°F − 32) × 5/9. The oven dial rounds that Celsius value to the nearest 10°C (the conventional setting). Gas mark = (°F − 250) ÷ 25 for marks of 1 and above (gas mark 1 = 275°F, 4 = 350°F, 6 = 400°F); marks ¼ and ½ are the low settings at 225°F and 250°F.
Example calculation
A moderate oven of 350°F is 180°C on the dial and gas mark 4. The exact conversion is (350 − 32) × 5/9 = 176.7°C, which rounds to the conventional 180°C oven-dial setting; gas mark 4 is the matching British setting.
- ovenDialCelsius
- 180
- celsius
- 176.7
- gasMark
- 4
Assumptions
- The oven-dial value rounds the exact Celsius to the nearest 10°C, matching the conventional dial markings — 350°F is 176.7°C exactly but is set as 180°C.
- Gas marks above gas mark 1 follow the linear 25°F-per-step scale; the sub-1 marks (¼ and ½) for low ovens are fixed lookup values.
- Oven thermostats drift, and fan (convection) ovens run hotter for the same setting — many cooks lower a fan oven by about 20°C versus a conventional one. Use an oven thermometer for accuracy.
Common mistakes
- Setting a fan (convection) oven to the conventional temperature — fan ovens run hotter, so reduce the setting by roughly 20°C or 25°F.
- Confusing the exact Celsius (176.7°C) with the dial setting (180°C); ovens are marked in round numbers.
- Mixing up gas marks with Celsius — gas mark 4 is 350°F or 180°C, not 4°C.
Frequently asked questions
What is 350°F in Celsius?
350°F is 176.7°C exactly, which is set as 180°C on a conventional oven dial and is gas mark 4.
What is gas mark 6?
Gas mark 6 is 400°F, or about 200°C — a fairly hot oven used for many breads and pastries.
Should I lower the temperature for a fan oven?
Usually yes. Fan (convection) ovens circulate hot air and run hotter for the same dial setting, so most guidance is to reduce the temperature by about 20°C (or 25°F) versus a conventional oven.
Why does the oven dial say 180°C but the math says 176.7°C?
Oven dials are marked in round numbers, so the exact 176.7°C conversion of 350°F is set as the nearest standard dial value, 180°C.