Oven Temperature Converter — °C,

How Oven Temperature Converter — °C, Works

°F = °C × 9/5 + 32 | °C = (°F − 32) × 5/9 | Gas Mark = round((°C − 135) / 14 + 1) for °C ≥ 135

°C

Celsius — The metric temperature scale, also called centigrade, where water freezes at 0°C and boils at 100°C at sea level. Used for oven temperature settings in most countries worldwide including Europe, Australia, New Zealand, and most of Asia.

°F

Fahrenheit — The imperial temperature scale where water freezes at 32°F and boils at 212°F at sea level. Predominantly used for oven temperature settings in the United States and a few Caribbean nations.

Gas Mark

Gas Mark — A temperature scale unique to gas ovens in the United Kingdom and Commonwealth countries. Marks range from ¼ (very cool, 110°C) to 10 (very hot, 260°C), with Gas Mark 4 (180°C / 350°F) representing a standard moderate oven for most baking.

Fan Oven

Fan / Convection Oven — Ovens with a fan that circulates hot air for more even and efficient cooking. Fan oven recipes typically require temperatures about 20°C (36°F) lower than conventional (non-fan) oven recipes to achieve the same results.

How to Use

1. Enter the temperature value in the input field. For Gas Mark conversions, enter the Gas Mark number (e.g., 4 for Gas Mark 4, 0.25 for ¼, 0.5 for ½).
2. Select the unit you are converting from: °C, °F, or Gas Mark.
3. Select the unit you want to convert to: °C, °F, or Gas Mark.
4. Read the converted result instantly along with the equivalent temperature in all three scales and a descriptive oven term (e.g., "Moderate oven"). Use this for international recipes that specify unfamiliar temperature scales.

Quick Reference

Common Uses

• •Baking international recipes that specify temperatures in unfamiliar units, such as converting a British Gas Mark recipe to Fahrenheit for a US oven
• •Adjusting conventional oven recipes for fan or convection ovens by reducing the temperature by 20°C (36°F)
• •Understanding vintage cookbooks that use Gas Mark settings before modern digital temperature controls
• •Converting oven temperatures for foods like bread, pastries, and roasted meats where precise temperature control is critical for proper texture and doneness
• •Translating recipe temperatures for kitchen appliances with different display scales, such as using an air fryer or toaster oven that defaults to Celsius

Understanding the Result

Frequently Asked Questions

What is the Gas Mark system and why was it invented?

The Gas Mark system originated in the United Kingdom in the early 20th century when gas ovens became common in households. Gas ovens did not have precise temperature controls, so manufacturers assigned numbers (marks) to specific gas regulator settings. The first standardized Gas Mark table was published by the British Standards Institution in the 1930s. Gas Mark 4 (180°C / 350°F) became the default moderate oven setting for most baking. The system persists in UK cookbooks and on many modern British ovens, even though most now also display Celsius. Understanding gas marks is essential for anyone following traditional UK recipes or using vintage cookbooks.

When should I reduce the temperature for a fan oven?

You should reduce the temperature for a fan (convection) oven by approximately 20°C (36°F) when following a recipe designed for a conventional (non-fan) oven. This is because the fan circulates hot air, transferring heat to the food more efficiently. The same principle applies to cooking times: fan ovens often cook food 10–25% faster. If a recipe gives a fan oven temperature, use that directly. If only conventional temperatures are given, the conversion rule of thumb is: fan temperature = conventional temperature minus 20°C. For precise results, many modern recipes explicitly state temperatures for both oven types.

Can I use Gas Mark settings on an electric oven?

Yes, Gas Mark settings are temperature equivalents, not actual gas settings. Whether your oven is gas, electric, fan, or induction, the Gas Mark corresponds to a specific temperature range. Set your electric oven to the Celsius or Fahrenheit equivalent of the Gas Mark specified in the recipe. For example, if a recipe calls for Gas Mark 5 (190°C / 375°F), simply set your electric oven to 190°C or 375°F. The Gas Mark system describes the cooking temperature, not the fuel type.

What is the difference between °C and °F for baking accuracy?

The precision difference between Celsius and Fahrenheit for baking is subtle but real. Fahrenheit has 180 degrees between freezing and boiling, while Celsius has 100 degrees, making Fahrenheit a finer-grained scale. In practice, most ovens maintain temperature within ±10°C (±20°F) of the set point anyway, so the theoretical precision difference rarely matters. More important is knowing your individual oven's hot spots and calibration. An oven thermometer is recommended for any serious baking, regardless of the scale used.

What happens if I bake at the wrong temperature?

Baking at the wrong temperature can significantly affect results. Too low a temperature can cause cakes to sink in the middle, cookies to spread too much, bread to have a dense crumb, and pastries to be soggy rather than flaky. Too high a temperature can cause burning on the outside while the inside remains undercooked, cakes to dome excessively or crack, and cookies to brown too quickly without spreading properly. Most baked goods are particularly sensitive to temperature, which is why accurate conversion between oven scales matters especially for baking.

Sources

• BBC Good Food - Oven Temperature Conversions
• Wikipedia - Gas Mark