Understanding Oven Temperatures
Why Different Scales?
The US uses Fahrenheit, most of the world uses Celsius, and the UK traditionally used Gas Marks (still common in older cookbooks). Knowing how to convert ensures your recipes work correctly regardless of origin.
Convection Adjustment
Convection (fan) ovens circulate hot air, cooking food faster and more evenly. Reduce the temperature by 25°F (15°C) and check your food 25% sooner than the recipe suggests.
Temperature Categories
Frequently Asked Questions
What is Gas Mark and who uses it?
Gas Mark is a temperature scale used primarily in the UK and Ireland for gas ovens. It ranges from ¼ (very low) to 10 (very high). Many British recipes, especially older ones, use Gas Mark. Each number roughly corresponds to a 25°F increment, starting from Gas Mark 1 = 275°F.
How accurate are home oven thermostats?
Home ovens are often off by 25-50°F from the set temperature. We highly recommend using an oven thermometer to check your actual temperature. Ovens also have hot spots, so rotating pans halfway through cooking helps ensure even results.
Should I always preheat my oven?
Yes, for most baking! Baked goods need consistent heat from the start for proper rise and texture. For casseroles, roasts, and braises, preheating is less critical. Allow 10-15 minutes for preheating; longer for very high temperatures.
How do I adjust for high altitude baking?
Above 3,000 feet, increase oven temperature by 15-25°F. Lower air pressure causes baked goods to rise faster and dry out more quickly. Also reduce leavening agents slightly and increase liquids. Experimentation is key at high altitude.