Oven temperature conversion

Oven temperature conversion: how to convert Fahrenheit to Celsius

When you need to convert a recipe's oven temperature, two formulas cover it. Fahrenheit to Celsius: subtract 32 and divide by 1.8. Celsius to Fahrenheit: multiply by 1.8 and add 32. These are the exact conversion equations in NIST Handbook 44, so the converter gives the true number: 180 °C is 356 degrees Fahrenheit and 350 °F is 176.7 degrees Celsius.

Oven temperature conversion chart: Celsius to Fahrenheit

Oven settings in degrees Celsius, as written in recipes from countries that use it, converted exactly:

Oven temperature conversion table: Fahrenheit to Celsius

To convert Fahrenheit to Celsius at a glance, US recipe temperatures in degrees Fahrenheit, converted exactly:

The exact number and the oven dial

An exact conversion may not land on a mark of your oven dial. 180 °C is 356 °F, and 350 °F is 176.7 °C, so the two are close but not the same temperature. Set the nearest mark your oven has and let the recipe's doneness test decide; the converter gives the number, not a recommended setting.

Gas marks

British and Irish recipes often give a gas mark instead of degrees. Gas marks have no exact conversion; the usual gas mark scale runs from ¼ to 9 in steps of 25 °F, and the converter uses one Fahrenheit and one Celsius value per mark: gas mark 4 is 350 degrees Fahrenheit or 180 degrees Celsius, gas mark 6 is 200 degrees Celsius. Pick "Gas" in "From" or "To"; a temperature between two marks gives the nearest one, marked "≈", so 175 °C reads as ≈ Gas mark 4.

Set fan oven temperatures lower: fan and convection ovens

A fan (convection) oven cooks faster at the same setting. The common rule of thumb is to set it about 20 °C or 25 °F lower than a recipe written for a conventional oven: 200 °C becomes 180 °C fan, and 350 °F becomes 325 °F convection. Pick "°C fan" or "°F fan" (a convection oven) in the converter to apply it. Ovens differ, and some recipes already give the fan temperature, so check what yours says and let the doneness test decide.

Sources

• NIST Handbook 44, Appendix C

• Cooking conversion chartCups, spoons, ounces, grams, milliliters and oven temperatures on one printable page, with the abbreviations recipes use.
• Cups to grams converter and conversion tableOne US cup weighs 198 grams of granulated sugar but 227 grams of butter: pick the ingredient and type the cups.
• Grams to ounces converterOne ounce is 28.35 grams, for any ingredient: type grams, get ounces and pounds.
• Cups to mL converterA US cup is 236.6 mL: type cups, pick the cup your recipe uses, get milliliters.
• Grams to cups converterPick the ingredient, type the grams and get US cups and spoons, with the fill method the weight assumes.