Oven Temperature Conversion: °C, °F, Gas Mark & Fan-Forced (With a Free Calculator)
Convert oven temperatures between Celsius, Fahrenheit, gas mark and fan-forced — with a free calculator, a full conversion chart, and the fan-forced rule that stops your baking burning.
Why Oven Temperatures Are So Confusing
A recipe says 350°F, your oven is in Celsius, and it's fan-forced — three different systems for one number. American recipes use Fahrenheit, most of the world uses Celsius, older British recipes use gas marks, and modern ovens add a fan-forced (convection) setting that runs hotter than it reads. Get it wrong and a cake meant for 160°C fan ends up at 180°C — dry outside, raw in the middle.
Quick converter
Convert cups, grams, millilitres and oven temperatures — instantly, right here.
= 356 °F
Oven Temperature Conversion Chart
| Description | °C (conventional) | °F | Gas Mark | °C (fan-forced) |
|---|---|---|---|---|
| Very cool / slow | 110 | 225 | ¼ | 90 |
| Very cool | 120 | 250 | ½ | 100 |
| Cool | 140 | 275 | 1 | 120 |
| Cool | 150 | 300 | 2 | 130 |
| Moderate | 160 | 325 | 3 | 140 |
| Moderate | 180 | 350 | 4 | 160 |
| Moderately hot | 190 | 375 | 5 | 170 |
| Hot | 200 | 400 | 6 | 180 |
| Hot | 220 | 425 | 7 | 200 |
| Very hot | 230 | 450 | 8 | 210 |
| Very hot | 240 | 475 | 9 | 220 |
180°C / 350°F / gas mark 4 is the workhorse "moderate" oven for most cakes and biscuits.
The Fan-Forced Rule (Don't Skip This)
A fan-forced (convection) oven circulates hot air, so it cooks faster and more evenly — and effectively runs about 20°C hotter than a conventional oven at the same dial setting.
The rule: subtract 20°C when a recipe is written for a conventional oven and you're using fan-forced. So 180°C conventional becomes 160°C fan-forced. If the recipe already says "fan," use it as written. When in doubt, drop 20°C and check a few minutes early.
Converting Fahrenheit to Celsius Manually
°C = (°F − 32) × 5 ÷ 9 — e.g. 375°F: (375 − 32) × 5 ÷ 9 = 190°C. The other way: °F = (°C × 9 ÷ 5) + 32.
Convert a Whole Recipe at Once
Oven temperature is just one part of adapting a recipe. KitchenConvert converts temperatures, scales servings, and turns cups into grams across an entire recipe in one step — paste it in, pick your units, and every measurement comes out in the system your kitchen uses.
Working from an American recipe? See our full guide on how to convert cups to grams for ingredient-by-ingredient weights.
Working in millilitres? Our millilitres to cups guide converts ml to US and metric cups.
Frequently Asked Questions
What is 350°F in Celsius? 350°F is 177°C, rounded to 180°C in most recipes — gas mark 4, a "moderate" oven. For fan-forced, use 160°C.
What does gas mark 6 mean in Celsius? Gas mark 6 is 200°C conventional (400°F), or about 180°C fan-forced — a "hot" oven for roast potatoes and some breads.
Do I need to change the temperature for a fan-forced oven? Yes. Fan-forced runs roughly 20°C hotter than conventional at the same setting, so subtract 20°C — 200°C conventional becomes 180°C fan-forced — and start checking earlier.
Why does my oven seem wrong even after converting? Home ovens are often 10–20°C out from their dial and have hot spots. A cheap oven thermometer on the middle shelf tells you the real temperature.
Related guides
6 Best Egg Substitutes for Baking (With Exact Ratios)
Out of eggs? These 6 egg substitutes actually work in baking — applesauce, flax egg, yogurt, banana, silken tofu and aquafaba — with exact ratios per egg and which to use for cookies, cakes, brownies and meringue.
ML to Cups: Convert Millilitres to Cups (With a Free Calculator)
Convert millilitres to cups (US 240 ml and metric/Australian 250 ml) with a free calculator, a full ml-to-cups chart, and a clear answer to how many ml are in a cup.
The Gravy Formula: One Base, Ten Variations
Stop memorising ten separate gravy recipes. Once you understand the base ratio, every variation — onion, mushroom, peppercorn, red wine — is just a simple addition.