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Fan Oven vs Conventional, Gas Marks, and the Maillard Reaction — Why Cooking Temperature Is More Than Just a Number

Fan Oven vs Conventional, Gas Marks, and the Maillard Reaction — Why Cooking Temperature Is More Than Just a Number

Fan oven vs conventional oven differs by 20°C of cooking power — a recipe at 200°C conventional should be 180°C in a fan oven. Here's the complete Celsius/Fahrenheit/Gas Mark conversion table, why domestic ovens typically run 10-25°C off from their dial, the Maillard reaction temperature thresholds that explain why cooking temperature matters beyond "cooked through," and why 350°F became America's default baking temperature.

Jun 28, 2026
Why −40°C = −40°F: The Math Behind Temperature Conversion and What It Reveals About How Scales Were Designed

Why −40°C = −40°F: The Math Behind Temperature Conversion and What It Reveals About How Scales Were Designed

−40°C and −40°F are the same temperature — the only point where both scales agree — and this follows directly from the algebra of two scales defined with different zero points and different degree sizes. Here's where the 9/5 and +32 in the conversion formula actually come from, why Kelvin starts at absolute zero (and why that matters for physics equations), the Rankine scale almost nobody uses, and why 98.6°F is a rounded conversion artifact rather than a precise measurement.

Jun 22, 2026