Oven Temperature Converter
Free oven temperature converter. Switch between Fahrenheit, Celsius, and UK Gas Mark — with descriptions like Cool, Moderate, Hot for any setting.
Quick answer
°C = (°F − 32) × 5/9. Gas Mark 1 = 275°F = 140°C, increasing in 25°F (15°C) steps. Convection ovens run ~25°F (15°C) hotter than conventional — drop the temperature or shorten bake time when using convection mode.
Oven Temperature Converter
Equivalent temperatures
How it works
Standard formulas: °C = (°F − 32) × 5/9. Gas Mark uses a UK convention starting at Gas Mark 1 = 275°F (140°C) and increasing in 25°F (15°C) steps. Descriptions follow common cookbook usage (Cool, Warm, Moderate, Hot, Very Hot).
When to use it
Following British or European recipes that list temperatures in Celsius or Gas Marks, or converting an old US cookbook for a friend in metric land.
Common mistakes
Convection ovens run about 25°F (15°C) hotter than conventional. If your recipe says 350°F conventional and you're using convection, set it to 325°F or reduce the bake time by ~25%.
How the temperature converter works
The Fahrenheit-to-Celsius formula is the standard: subtract 32, multiply by 5/9. UK Gas Mark uses a separate scale starting at Gas Mark 1 = 275°F (140°C) and increasing in 25°F steps. Gas Mark 5 = 375°F (190°C) for typical baking; Gas Mark 8 = 450°F (230°C) for high-heat roasting. The calculator also tags each temperature with cookbook descriptions: cool, warm, moderate, hot, very hot — useful when a recipe says 'bake on moderate heat' without specifying.
When to use it
Following British or European recipes that use Celsius or Gas Mark. Converting an old US cookbook for someone in metric land. Tuning an air-fryer or convection oven from a conventional-oven recipe (drop ~25°F or 15°C). Validating thermometer readings against a recipe (especially when using a probe thermometer for meats).
Common mistakes
- Treating convection and conventional as identical. Convection ovens circulate hot air, browning faster and cooking ~25°F (15°C) hotter at the same setting. For convection, set 25°F lower than the conventional recipe calls for, or reduce bake time by ~25%.
- Approximating with C = F − 30 ÷ 2. The mental shortcut '(F − 30) ÷ 2' is close but inaccurate by 5-10°F at higher temperatures. Use the exact formula for baking precision.
- Forgetting that Gas Mark 0 doesn't really exist. Gas Mark 1/4 ≈ 225°F (110°C) is the lowest standard mark. Below that, recipes typically just specify Fahrenheit or Celsius directly.
Frequently asked questions
What is 350°F in Celsius?
About 177°C, often rounded to 175°C for oven settings. UK Gas Mark equivalent is 4. This is the most common baking temperature in U.S. recipes — moderate heat, good for cookies, brownies, and most cakes.
What is Gas Mark equivalent to oven temperatures?
Gas Mark 1 = 275°F (140°C). Each higher mark adds 25°F (15°C). Gas Mark 4 = 350°F (177°C); Gas Mark 7 = 425°F (218°C). The system is UK-specific and rare elsewhere.
Should I lower the temperature for a convection oven?
Yes. Convection ovens cook ~25°F (15°C) hotter than conventional at the same setting. Reduce the recipe's temperature by 25°F or shorten bake time by ~25%. Most modern ovens have a 'convection conversion' button that does this automatically.