Oven Temperature Converter

Convert between Fahrenheit, Celsius, and UK Gas Mark instantly.

Enter temperature in

Fahrenheit

350°F

Celsius

177°C

Gas Mark

4 (Moderate)

What is it?

This calculator converts oven temperatures between Fahrenheit, Celsius, and UK Gas Mark, so you can follow a recipe written for a different oven type without guessing.

Formula

°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9

Formula Explanation

Fahrenheit and Celsius convert using a straightforward linear formula. Gas Mark, used on older and UK gas ovens, doesn't have a formula — it's a standardized lookup scale, so this tool matches your temperature to the closest official Gas Mark setting.

Example Calculation

A recipe calling for 350°F converts to 177°C (often rounded to 180°C in recipes) and roughly Gas Mark 4, described as a "moderate" oven.

How to Use

Select whether you're entering Fahrenheit or Celsius.
Enter the oven temperature from your recipe.
Read off the equivalent Fahrenheit, Celsius, and Gas Mark settings.

Benefits

Covers all three common oven temperature systems in one tool.
Matches your temperature to the closest standard Gas Mark automatically.
Useful for following international recipes without conversion guesswork.

Use Cases

Converting a US recipe (Fahrenheit) for use with a Celsius or Gas Mark oven.
Understanding a British recipe's Gas Mark setting on a Fahrenheit or Celsius oven.
Double-checking recipe temperature conversions found online.

What Your Result Means

All three values represent the same oven temperature. Gas Mark is shown as the closest standard setting, since gas ovens are typically only calibrated to whole or half Gas Mark increments rather than exact degrees.

Tips

Recipes often round Celsius conversions to the nearest 10 degrees (e.g. 177°C becomes 180°C) for convenience — small rounding usually doesn't affect results.
Oven thermometers are worth using, since many home ovens run hotter or cooler than their dial suggests.
When in doubt between two Gas Mark settings, use the closer match and keep an eye on your food rather than relying purely on time.

Common Mistakes

Confusing a recipe's Fahrenheit and Celsius temperatures, which can drastically over- or under-cook a dish.
Assuming Gas Mark has an exact mathematical formula — it's a standardized scale, not a linear conversion.
Not adjusting temperature for fan/convection ovens, which typically run about 20°C (25°F) hotter than a recipe's stated conventional oven temperature.

FAQs

What is Gas Mark?

It's a temperature scale used mainly in the UK and Ireland for gas ovens, expressed as a numbered mark rather than a specific degree value, corresponding to a standardized set of temperature ranges.

Do I need to adjust temperature for a fan or convection oven?

Many recipes suggest reducing the temperature by about 20°C (25°F) or the cooking time slightly when using a fan/convection oven, since it circulates heat more efficiently than a conventional oven.

Why do recipe conversions sometimes round temperatures?

Exact Celsius conversions often aren't round numbers, so recipes commonly round to the nearest 5 or 10 degrees for simplicity — this rarely affects the final result meaningfully.

Gas Mark values shown are the closest standard setting — always check your specific oven's dial or manual, since exact calibration can vary by manufacturer.

Last updated: July 26, 2026