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No sign-up, no waiting. Type your numbers and get professional-grade calculations in real time.
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Works anywhere
Metric or imperial, any currency. Built for bakers in the UK, US, Europe, Australia and beyond.
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Baker's precision
From fermentation timing to lamination layers — every formula is grounded in real baking science.
Quick answer
Convert between Celsius, Fahrenheit and gas mark instantly, with a fan/convection adjustment applied automatically. Example: 220°C conventional → 200°C fan → 425°F → gas mark 7.
⚡ LIVE
Live Ferment Timer
Dough temp — how warm your mixed dough feels (use a probe thermometer for accuracy). Inoculation — starter weight divided by flour weight × 100 (e.g. 100g starter in 500g flour = 20%). The timer updates as you type and shows a ±25% window because every kitchen is different. Open Start time, starter, cold retard to: set when you begin bulk fermentation and get a "ready at" clock; adjust for whether your starter is freshly fed, at peak, or hungry; or model a cold retard in the fridge. DoughRise Coach subscribers can record actual bulk times — after 3 bakes the predictions are calibrated to your kitchen, starter, and flour.
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Start time, starter, cold retard
Start time
Hours since fed
After (h)
Retard temp (°C)
Duration (h)
h
Saves to your history · calibrates after 3 bakes
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Go Bakery →🌡️ Oven Temperature Converter
°C, °F, and gas mark, all live — with a fan/convection adjustment.
Enter a value in whichever unit you have — Celsius, Fahrenheit, or Gas Mark — and the other two update instantly. Tick 'This is a fan/convection temperature' if your recipe or oven reading is already a fan figure, so the calculator doesn't double-adjust.
Full gas mark reference table
| Gas | °C | °F | Label |
|---|---|---|---|
| ¼ | 110 | 225 | Very slow |
| ½ | 120 | 250 | Very slow |
| 1 | 140 | 275 | Slow |
| 2 | 150 | 300 | Slow |
| 3 | 160 | 325 | Moderate |
| 4 | 180 | 350 | Moderate |
| 5 | 190 | 375 | Moderately hot |
| 6 | 200 | 400 | Moderately hot |
| 7 | 220 | 425 | Hot |
| 8 | 230 | 450 | Hot |
| 9 | 240 | 475 | Very hot |
| 10 | 260 | 500 | Very hot |
Oven Science
Oven Temperature Converter
Quick answer
Enter any oven temperature in Celsius, Fahrenheit or gas mark, and the calculator converts instantly between all three, with a fan/convection offset built in.
The oven temperature converter above takes any oven temperature, in Celsius, Fahrenheit or gas mark, and converts it instantly to the other two. Recipes from different countries and different eras all describe heat differently, and this closes the gap in one step.
Gas marks are a British and Irish scale that predates accurate oven thermostats, running from a cool gas mark ¼ up to a blistering gas mark 10. Celsius and Fahrenheit are more precise, but a lot of classic British and European bread and cake recipes are still written in gas marks, so converting correctly matters more than it might seem.
Baking with a fan or convection oven? Tick the fan oven box above and the calculator applies the standard offset for you, so you can read a recipe written for a conventional oven and know exactly what to set the dial to.
The five most looked-up oven temperature conversions, at a glance.
180°C
= Gas mark 4, 356°F
20°C
Typical fan oven offset
12
Reference rows built in
How It Works
Gas marks, fan ovens and the maths behind the conversion
Gas mark sits roughly on the formula (°F − 250) ÷ 25, though the scale was standardised by trial and error rather than a clean equation, which is why gas mark 4 (180°C, 356°F) and gas mark 6 (200°C, 400°F) don't line up with perfectly even Celsius steps. The calculator uses the standard published conversion table rather than the approximate formula, so figures like gas mark 7 (220°C) and gas mark 8 (230°C) match what you'll find on an oven dial.
Fan and convection ovens circulate hot air instead of leaving it still, which strips away the thin layer of cooler air that normally insulates food and slows heat transfer. The practical effect is that a fan oven cooks noticeably faster and browns more evenly at the same dial temperature, so recipes written for a conventional oven typically knock off about 20°C (or 25°F) to get the equivalent fan temperature.
Worked example: converting gas mark 6
- Gas mark 6 → 200°C (standard table)
- 200°C → 400°F
- Fan equivalent: 200°C − 20°C ≈ 180°C
Cross-check any of these figures against the calculator's own 12-row reference table above, which spans the full range from a very cool gas mark ¼ up to a blazing gas mark 10.
Common mistakes
Applying the fan adjustment twice
Some recipes are already written specifically for a fan oven, in which case the temperature given needs no further adjustment. Check whether your recipe says ’fan’ or ’convection’ before ticking the fan oven box, or you’ll end up baking 20°C too cool.
Trusting the dial over the oven's actual temperature
Domestic ovens routinely run 10 to 20°C hotter or cooler than the number on the dial, regardless of how carefully you’ve converted it. An inexpensive oven thermometer left inside will tell you what’s really happening, and is worth more than another decimal place of conversion accuracy.
Frequently Asked
Questions about
oven temperature conversion
What is 180C in Fahrenheit?
180°C is 356°F, also gas mark 4, a moderate oven and the most common baking temperature for bread and cakes.
How do I convert a fan oven temperature?
Fan ovens run hotter for the same air temperature, so recipes usually knock off about 20°C (or 25°F) from the conventional figure. Tick ’this is a fan/convection temperature’ above to see the conventional equivalent instead.
What’s gas mark 6 in Celsius?
Gas mark 6 is 200°C or 400°F, a moderately hot oven common for pizza and roasting.
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