Oven Temperature Converter — °F, °C & Gas Mark

The Formula

Oven temperatures are measured differently across the world. The United States uses Fahrenheit (°F), most other countries use Celsius (°C), and the United Kingdom additionally uses Gas Mark numbers for gas ovens. Converting between Fahrenheit and Celsius uses the formulas shown above. Gas Marks are a discrete scale originally designed for gas ovens in the UK, where each whole number corresponds to a specific temperature range.

Variable Definitions

How to Use This Calculator

1. 1

   Enter the temperature value you want to convert.

2. 2

   Select the unit of the input temperature: °F (Fahrenheit), °C (Celsius), or Gas Mark.

3. 3

   For Gas Mark input, you can enter whole numbers (1–10) or fraction values like "1/4" and "1/2".

4. 4

   View the converted temperatures in all three scales, plus a cooking description and the formula used.

Common Applications

• Converting oven temperatures when following a recipe written in a different scale (Fahrenheit, Celsius, or Gas Mark)
• Looking up the Gas Mark equivalent for a specific Fahrenheit or Celsius temperature used in a UK or Commonwealth recipe
• Adjusting oven temperature for high-altitude baking by converting the recommended adjustment to your oven's scale
• Understanding the cooking description (e.g., "Moderate / Medium") associated with different temperature ranges

Oven temperature equivalence across Fahrenheit, Celsius, and Gas Mark scales, from Very Slow (225 F / 107 C / Gas Mark 1/4) to Extremely Hot (500 F / 260 C / Gas Mark 10).

Understanding the Concept

Oven temperature conversions are essential when following recipes from different countries. The Fahrenheit scale, developed by Daniel Gabriel Fahrenheit in 1724, sets the freezing point of water at 32°F and boiling at 212°F. The Celsius scale, also called centigrade, sets freezing at 0°C and boiling at 100°C — a more intuitive decimal system adopted by most of the world. The Gas Mark scale originated in the UK as a numbering system for gas oven regulators, with Gas Mark 1 starting at 275°F (135°C) and each subsequent mark increasing by approximately 25°F (14°C). Modern electric ovens in the UK still display Gas Marks alongside Celsius because many traditional British recipes reference them by number. Understanding these conversions prevents baking disasters: a cake recipe calling for Gas Mark 4 (350°F / 177°C) baked at Gas Mark 6 (400°F / 204°C) would likely burn on the outside while remaining raw inside. The Fahrenheit–Celsius conversion formula is linear, but Gas Mark conversions rely on a lookup table because the gas mark scale is discrete. This calculator handles all three conversions instantly, so you can confidently cook any recipe regardless of the temperature units used.

Frequently Asked Questions

Sources & References