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Free online oven temperature converter

An oven temperature converter switches between Fahrenheit, Celsius, and the British Gas Mark scale. Type any temperature and the other two units appear instantly, along with a.

About this calculator

How to use

  1. Type any oven temperature — in Fahrenheit, Celsius, or Gas Mark.
  2. Select the unit from the dropdown.
  3. Read the converted temperatures and oven description instantly.
  4. Scroll the table to find any Gas Mark from 1 to 9.

Formulas

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

Gas Mark reference (exact lookup):
  Gas 1 = 275°F / 135°C
  Gas 2 = 300°F / 150°C
  Gas 3 = 325°F / 160°C
  Gas 4 = 350°F / 175°C
  Gas 5 = 375°F / 190°C
  Gas 6 = 400°F / 200°C
  Gas 7 = 425°F / 220°C
  Gas 8 = 450°F / 230°C
  Gas 9 = 475°F / 240°C

Oven descriptions:
  Cool:     below 325°F
  Moderate: 325–375°F
  Hot:      376–450°F
  Very Hot: above 450°F

Worked example

A British recipe calls for Gas Mark 6:

Gas 6 = 400°F = 200°C = Hot oven

An American recipe calls for 350°F:

350°F = 177°C ≈ Gas Mark 4 = Moderate oven

Notes

  • Oven thermometers are inexpensive and worth buying — most domestic ovens are off by 25°F or more.
  • Fan-assisted (convection) ovens cook about 25°F hotter than conventional ovens. Reduce the recipe temperature by 25°F or Gas Mark 1 when using a convection setting.

Frequently asked

What is Gas Mark 4 in Fahrenheit?
Gas Mark 4 is 350°F (approximately 175°C). It is the most commonly called-for oven temperature in British and Irish recipes — sometimes called a moderate oven.
What is the Gas Mark scale?
The Gas Mark system is used in the United Kingdom and Ireland to describe oven temperatures on gas cookers. Gas Mark 1 is the coolest (275°F / 135°C) and Gas Mark 9 is the hottest (475°F / 240°C). Each mark represents a rise of 25°F.
How do I convert Celsius to Fahrenheit for ovens?
Multiply by 9, divide by 5, then add 32: °F = (°C × 9/5) + 32. For example, 180°C = (180 × 9/5) + 32 = 324 + 32 = 356°F.
What does a moderate oven mean?
A moderate oven is 325–375°F (160–190°C, Gas 3–5). Most baked goods and roasts cook in this range.
What is a cool oven?
A cool oven is below 325°F (160°C, Gas 1–2). Used for slow-drying meringues, warming bread, or slow roasting.
How do I share the converted temperature?
Click Share to copy the page link, or Share with my numbers to include the temperature and unit in the URL.