What makes a convection oven different
A convection oven uses a fan to circulate hot air around the food. Moving air transfers heat faster than still air, so food cooks more quickly and browns more evenly, and you can bake on several racks at once. True convection (also called European or third-element convection) has a heating element around the fan for the most even heat; fan-assisted ovens just move the air heated by the top and bottom elements. Many countertop ovens and combi steam ovens also have a convection mode.
The conversion rules
Lower the temperature by 25 °F (about 15 °C) – or – keep the temperature and cut the time by 20 – 25 %
Which rule to use depends on the food. For baking, lower the temperature and keep the time, so cakes and breads rise before the crust sets. For roasting meat and vegetables, keep the temperature and shorten the time: the browning is welcome and you save time. For cookies and pastries a combination works well. Many modern ovens have an automatic "convection conversion" that lowers the temperature for you – check the manual so you don't convert twice.
Quick reference
| Conventional | Convection (baking) | °C conventional → fan |
|---|
| 325 °F | 300 °F | 160 °C → 145 °C |
| 350 °F | 325 °F | 180 °C → 160 °C |
| 375 °F | 350 °F | 190 °C → 175 °C |
| 400 °F | 375 °F | 200 °C → 185 °C |
| 425 °F | 400 °F | 220 °C → 200 °C |
| 450 °F | 425 °F | 230 °C → 210 °C |
When not to use convection
- Custards, cheesecakes and soufflés – moving air can cause cracking and uneven setting.
- Delicate cakes and quick breads in some ovens – a lopsided rise means the fan is too strong.
- Foods covered with foil or lids – the fan gives little benefit.
Tips
- Use rimmed baking sheets with low sides and roasting pans with low walls.
- Leave at least an inch between pans and the oven walls.
- Check doneness at about three-quarters of the converted time.
- An oven thermometer tells you if your oven runs hot or cold – many do by 15 – 25 °F.
Buying a convection oven or range
Look for true (third-element) convection, a convection roast mode, accurate temperature control and good interior lighting. Countertop convection ovens and air fryer ovens are an energy-efficient choice for small households and add capacity during holidays.
Frequently asked questions
How do I convert a recipe to a convection oven?
For baking, lower the temperature by 25 °F (15 °C) and keep the time. For roasting, keep the temperature and reduce the time by 20 – 25 %.
Is 350 °F conventional the same as 325 °F convection?
Yes, for most baking. Check a few minutes early the first time.
Should I use convection for cakes?
Many cakes bake well on convection at a lower temperature, but very delicate cakes and cheesecakes are better on the regular setting.
Does convection cook faster?
Yes. Moving air transfers heat faster, typically cutting roasting time by about 20 – 25 %.
What is true convection?
An oven with a third heating element around the fan, which gives more even heat than fan-only (fan-assisted) convection.
About FanBake
FanBake is an independent, free conversion calculator for convection, fan-forced and true-convection ovens, based on widely used manufacturer and test-kitchen guidance. Ovens vary, so check doneness early. We are not affiliated with any oven manufacturer.
Every formula on this page runs entirely in your web browser. The numbers you type are never uploaded, stored or shared. Our goal is simple: give you an honest starting point so you can compare product specifications with confidence and avoid paying for capacity you do not need – or buying something too small to do the job.
The methodology combines widely published engineering rules of thumb, manufacturer data sheets and the electrical code practices that installers use every day. We review the assumptions regularly and update the calculator when typical product specifications change.
Privacy Policy
Last updated: October 28, 2026
This Privacy Policy explains how FanBake ("we", "us") handles information when you visit this website. By using the site you agree to this policy.
Information we collect
We do not require registration and we do not ask for your name, address or payment details. Values entered into the calculator are processed locally in your browser and are not transmitted to our servers. Like most websites, our hosting provider may automatically record standard server log data such as IP address, browser type, referring page and time of visit for security and performance purposes.
Cookies and advertising
We use Google AdSense to show advertisements that keep this tool free. Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website or other websites. Google's use of advertising cookies enables it and its partners to serve ads to users based on their visit to this site and/or other sites on the Internet. You may opt out of personalized advertising by visiting Google Ads Settings, or opt out of some third-party vendors' use of cookies for personalized advertising at www.aboutads.info (US) or www.youronlinechoices.eu (Europe). To learn more, see How Google uses information from sites or apps that use its services.
Visitors from the European Economic Area, the United Kingdom and Switzerland are shown a consent message powered by a Google-certified consent management platform, where you can accept, reject or manage cookie choices. You can change your choices at any time from the privacy link displayed by that message. Some visitors may also be offered the option to view a short ad or complete another offer in exchange for access to the content; this choice is provided by Google and is entirely optional where alternatives are offered.
Analytics
We may use privacy-friendly, aggregated statistics to understand which features are used. These statistics do not identify you personally.
Your rights
Depending on where you live (for example under the GDPR or the CCPA/CPRA), you may have the right to access, correct or delete personal data and to object to certain processing. Because we do not keep personal data from the calculator, most requests can be handled by clearing cookies in your browser. For any other request, contact us at the address above.
Children
This site is intended for a general adult audience and is not directed at children under 13. We do not knowingly collect personal information from children.
Changes to this policy
We may update this policy from time to time. The date at the top of this section shows when it was last revised.
Terms of Use & Disclaimer
The calculator and articles on this website are provided free of charge for general information and educational purposes only. Results are estimates based on typical values and simplifying assumptions; real-world performance depends on the specific product, installation, climate, wiring and how you use your equipment.
Nothing on this site is professional engineering, electrical or financial advice. Always follow the manufacturer's instructions and local electrical codes, and have permanent installations, transfer switches and grid-connected systems designed and installed by a licensed electrician or qualified installer. Never operate fuel-burning generators indoors or in enclosed spaces – carbon monoxide can kill within minutes.
The site is provided "as is" without warranties of any kind. To the fullest extent permitted by law, FanBake is not liable for any loss or damage arising from the use of, or reliance on, the information or results provided. Product and brand names mentioned belong to their respective owners and are used for identification only. You may use the calculator for personal and commercial purposes, but you may not copy or republish the site content without permission.
FanBake