WhiskMath

Oven Temperature Converter

Convert oven temperatures between Fahrenheit, Celsius and UK gas marks in one step.

°F
Fahrenheit
350°F
Celsius
177°C
Gas mark
4
UK gas mark
  • Gas marks run from 1 (275°F) to 9 (475°F) in 25°F steps.
  • Fan or convection ovens run hotter — drop the temperature about 25°F (15°C) from these figures.
  • Oven thermostats drift over time; an oven thermometer confirms the real temperature.
Save to Pinterest

How to use this calculator

  1. Enter the temperature

    Type the oven temperature from your recipe, or the gas mark number.

  2. Choose the unit

    Select whether you entered Fahrenheit, Celsius or a gas mark.

  3. Read all three systems

    The calculator shows the temperature in Fahrenheit, Celsius and the nearest gas mark at once.

  4. Adjust for a fan oven

    If you have a fan or convection oven, drop the temperature about 25°F (15°C) from the figure shown.

Recommended gear

As an Amazon Associate, WhiskMath earns from qualifying purchases. These picks don't cost you anything extra.

ThermoPro TP19 Digital Meat Thermometer

A thermometer confirms your oven and your food actually reach the temperature you set.

$15-20

View on Amazon

Oven temperature conversion chart

FahrenheitCelsiusGas markDescription
275°F135°CGas 1Very slow / very cool
300°F150°CGas 2Slow / cool
325°F165°CGas 3Warm
350°F180°CGas 4Moderate
375°F190°CGas 5Moderately hot
400°F200°CGas 6Hot
425°F220°CGas 7Hot
450°F230°CGas 8Very hot
475°F245°CGas 9Very hot

Conversions are rounded to the values recipes use. Fan ovens: reduce by about 25°F (15°C).

Tips & best practices

  • Always preheat fully — most ovens need 15 to 20 minutes to reach a stable temperature.
  • Use an oven thermometer to check the real temperature; dials are often off by 15 to 25 degrees.
  • For fan or convection ovens, lower the recipe temperature by about 25°F (15°C).
  • Position your rack in the centre unless the recipe says otherwise — that is where heat is most even.
  • Resist opening the door; each peek can drop the temperature by 25 degrees or more.

Frequently asked questions

How do I convert Fahrenheit to Celsius for an oven?
Subtract 32 from the Fahrenheit temperature, then multiply by 5 and divide by 9. For example, 350°F becomes (350 − 32) × 5 ÷ 9, which is about 177°C.
How do I convert Celsius to Fahrenheit for an oven?
Multiply the Celsius temperature by 9, divide by 5, then add 32. For example, 180°C becomes (180 × 9 ÷ 5) + 32, which is 356°F.
What is gas mark 4 in Fahrenheit and Celsius?
Gas mark 4 is 350°F or 180°C. It is the most common baking temperature and is often described as a moderate oven.
What temperature is a moderate oven?
A moderate oven is around 350°F, 180°C, or gas mark 4. A slow oven is closer to 300°F and a hot oven is around 425°F to 450°F.
How do gas marks work?
Gas marks are a numbered scale used mainly in the UK. Gas mark 1 is 275°F (135°C) and each mark up adds 25°F, running to gas mark 9 at 475°F (245°C).
Should I lower the temperature for a fan or convection oven?
Yes. Fan and convection ovens circulate hot air and cook more efficiently, so reduce the recipe temperature by about 25°F or 15°C, or check your oven's manual for its specific guidance.
Why does my oven seem hotter or cooler than the dial says?
Oven thermostats drift over time and many run 15 to 25 degrees off. An inexpensive oven thermometer placed inside lets you see the real temperature and adjust the dial accordingly.
Is 180°C exactly 350°F?
Not exactly. 180°C is 356°F and 350°F is about 177°C, but recipes round them to 180°C and 350°F because ovens are not precise enough for the small difference to matter.

Related calculators

Cups to Grams Converter

Convert cups to grams for any baking ingredient — flour, sugar, butter, honey and more, each with its own weight.

Open calculator

Ounces to Cups Converter

Convert ounces to cups — and finally understand the difference between fluid ounces and weight ounces.

Open calculator

Tablespoons to Teaspoons Converter

Convert between tablespoons, teaspoons, cups and fluid ounces — quick, exact kitchen measurement math.

Open calculator

Oven to Air Fryer Converter

Turn any oven recipe into air fryer settings — adjusted temperature and time, instantly.

Open calculator

Air Fryer Cooking Time Calculator

Pick a food and instantly get the right air fryer temperature, cook time, and when to flip or shake.

Open calculator

High Altitude Baking Adjustment Calculator

Get the exact flour, sugar, liquid, leavening, oven temperature, and time changes your recipe needs at elevation.

Open calculator

Sources: Standard oven temperature conversions.

Results are estimates for informational use. For food safety, always confirm meat doneness with a thermometer against current USDA guidance. WhiskMath does not provide medical or dietary advice.