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Convert an oven setting between Fahrenheit, Celsius and selected gas marks. The tool reports the equivalent temperature and, for Fahrenheit or Celsius inputs, the nearest gas mark in its reference table. It is designed for recipe conversion, not oven calibration.
Oven temperature converter
Results are estimates based on the values you enter. Nothing you type is sent to or stored on our servers.
Conversion model
Fahrenheit and Celsius are converted using the exact relationship: °C = (°F − 32) × 5/9 and °F = (°C × 9/5) + 32. Gas marks are not a continuous temperature scale. They are conventional oven settings represented by a discrete lookup table, so the converter selects the closest listed Fahrenheit temperature.
The reference points used here are: Gas Mark ¼ = 225 °F / 110 °C; ½ = 250 °F / 120 °C; 1 = 275 °F / 140 °C; 2 = 300 °F / 150 °C; 3 = 325 °F / 160 °C; 4 = 350 °F / 180 °C; 5 = 375 °F / 190 °C; 6 = 400 °F / 200 °C; 7 = 425 °F / 220 °C; 8 = 450 °F / 230 °C; and 9 = 475 °F / 240 °C.
Worked examples
A recipe that calls for 350 °F converts to about 176.7 °C. The nearest gas-mark reference in this table is Gas Mark 4, listed as 350 °F / 180 °C. A recipe written at 200 °C converts to 392 °F, whose nearest listed gas mark is 6 at 400 °F.
If a recipe specifies Gas Mark 5, the reference is about 375 °F or 190 °C. These are conventional rounded settings rather than a guarantee that every oven will reach exactly that air temperature.
How to use the converter
- Enter the numeric oven setting.
- Select Fahrenheit, Celsius or Gas Mark as the input unit.
- Calculate and read the converted temperature. If you selected Gas Mark, use one of the supported values shown in the input guidance.
- For a fan oven, check whether the recipe gives a separate convection setting before applying a general adjustment.
Fan and convection ovens
Fan ovens circulate heated air, which can transfer heat more efficiently and produce more even browning. Many recipes suggest reducing a conventional setting by about 20 °C or 25 °F when adapting to a fan oven. This is only a starting point: oven design, fan speed, tray position and recipe type all matter. Follow the recipe or appliance manual when it gives a specific fan setting.
Accuracy and limitations
Gas-mark labels vary in the way they are rounded, and real ovens cycle around a thermostat target. The temperature near the back or top of the cavity can differ from the reading near the door. A separate oven thermometer can reveal calibration error, while a probe thermometer checks the food itself.
Do not use an oven air-temperature conversion as a food-safety endpoint. Meat, poultry and casseroles should be checked using a suitable food thermometer and current food-safety guidance.
Frequently asked questions
What gas mark is 180 °C?
In this reference table, 180 °C is listed at Gas Mark 4, corresponding to about 350 °F.
What is 350 °F in Celsius?
It is about 176.7 °C by the exact formula, commonly rounded to 175 °C or 180 °C in recipe instructions.
Should I lower the temperature for a fan oven?
Often recipes use a reduction near 20 °C or 25 °F, but the correct adjustment depends on the oven and recipe. Follow the manufacturer’s instructions where available.
Related tools and reference
For a direct temperature conversion, use the Fahrenheit to Celsius Converter. Exact Fahrenheit/Celsius formulas are documented by NIST; gas-mark settings are conventional oven references.