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 the Oven Temperature Converter?
Oven Temperature Converter Formula
°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9
How Is the Oven Temperature Converter Calculated?
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.
Oven Temperature Converter Example
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 the Oven Temperature Converter
Step 1
Select whether you're entering Fahrenheit or Celsius.
Step 2
Enter the oven temperature from your recipe.
Step 3
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.
Common Oven Temperature Converter Scenarios
Scenario 1
Converting a US recipe (Fahrenheit) for use with a Celsius or Gas Mark oven.
Scenario 2
Understanding a British recipe's Gas Mark setting on a Fahrenheit or Celsius oven.
Scenario 3
Double-checking recipe temperature conversions found online.
Understanding Your Result
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.
Frequently Asked Questions
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.
What temperature is a Gas Mark 4 in Fahrenheit and Celsius?
Gas Mark 4 is approximately 350°F or 180°C, a very common baking temperature for cakes and general baking.
Why do UK recipes use Gas Mark while US recipes use Fahrenheit?
It reflects historical differences in oven manufacturing and measurement conventions between countries — UK gas ovens traditionally used a Gas Mark dial rather than a numeric temperature display.
How much should I lower the temperature for a fan (convection) oven?
A common rule of thumb is to lower the temperature by about 20°C (or 25°F) from a conventional oven recipe, or reduce cooking time slightly, since fan ovens circulate heat more efficiently — check your oven's manual for its specific guidance.
Is oven temperature accuracy the same across all ovens?
No — many home ovens run several degrees hotter or cooler than their display shows; using an independent oven thermometer can reveal your specific oven's actual calibration.
Does altitude affect what oven temperature I should use?
Yes — at high altitudes, some recipes recommend adjusting oven temperature and other factors like baking time, due to lower atmospheric pressure affecting how foods rise and bake.
What's the highest Gas Mark, and what temperature does it represent?
Gas Mark 9 is the highest on the standard scale, corresponding to about 475°F or 240°C, used for very hot baking like certain breads or pizzas.
Important Information
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