How long does it take to preheat an oven to 400

How Long Does It Take To Preheat An Oven To 400

Are you wondering how long it takes to preheat an oven to 400? If yes, continue reading this blog and you will find out the answer. 

In modern life, the cooks, both new and professional ones, become more and more familiar with the use of technological equipment to support cooking. However, it is not simple for individuals to manage kitchen products without any errors. Similar cases also apply for ovens, one of the most useful items preferred by global cooks. 

Ovens appear in almost every household because of their outstanding feature: heating food while maintaining the original taste. However, when dealing with a range, most users will consider: How long does it take to preheat an oven to 400°F? If it is also your circumstance, the content illustrated below will help.


How Long Does It Take To Preheat An Oven To 400?

Usually, it takes you 17 to 20 minutes to preheat an oven to 400°F. 

Why is there a 3 minutes difference? You may ask. Simply speaking, whether you can preheat your oven quickly or slowly will mostly depend on the item itself. 

The way the appliance is made, the materials used, the objectives of manufacturers, etc., all affect the quality and characteristics, leading to some being heated up more quickly than others.

If you are not familiar with degree Fahrenheit, search tools online and find that 400°F can be converted into 200°C. Therefore, to reach 200°C, you have to preheat for 17 to 20 minutes.  


Besides, if you are using some particular types of devices, the concern about how long it takes to preheat an oven to 400 will be significantly different. To be specific, the required time can be totally in another direction. 

For example, a gas oven only needs 10 to 12 minutes to reach the ideal condition of 400 degrees Fahrenheit. Hence, if you pay much attention to the cooking time and want things ready as quickly as possible, you should consider purchasing a gas one. 

Read More: 

How Long To Cook A 10 Pound Pork Shoulder In Oven?

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Importance Of Preheating 

According to professional chefs, when using an oven to prepare meals, preheating it is one of the most critical steps you must take. Straightly jumping into cooking without allowing your machine time to be in the ideal condition is the biggest mistake new cooks can commit.

If your oven is not adequately preheated, its temperature will not be warm enough and create heavy, undercooked meals, much less become tasty as you wish.

Besides, good recipes will typically require you to preheat your oven for preparation steps. Keep in mind that you need at least 17 minutes to bring the appliance up to the right temperature. 

After reaching the appropriate temperature, the oven will let you know by shutting off its thermostat light. Another reason why you have to preheat the range is its nature. In other words, it requires several minutes to ‘settle’ in the temperature. 

The cycles of ovens with the average temperature range are somewhat higher and somewhat lower. Those variations get less when the stove is warmer. Too huge this fluctuation will remarkably affect the taste of meals.

Watch this video to know how to preheat an oven:

Factors Affecting Preheating Time 

Although the regular time needed to preheat the oven is from 17 to 20 minutes, other factors directly influence this period as follows:

Leaving unused oven racks

When using the oven, unused racks will add time to the preheating process. According to many recently conducted experiments, an unoccupied stand can lengthen the heating step for around 30 seconds. Therefore, removing the rack, if any, before preheating the gadget will save your time.

Avoid leaving the door open while preheating

Wide and spacious areas will allow hot air to “run away,” which is exceptionally undesirable.


Large oven cavities

Some types of ovens are bigger than others, leading to the fact that they require more time to reach a suitable temperature.


To save space in the house and make furniture neatly, modern housing designers may create unique places on the wall for placing the oven. As you may know, the wall is cold, and its temperature directly affects the stove, leading to a longer preheating time.

Room temperature

Similar to the wall, room temperature will impact the oven. So, for example, if your house is in a low-temperature environment, wait for a little longer to preheat.

Year of model

As a rule of thumb, older designs will take longer to preheat than current versions with features like fast preheating.

Click here to discover 95 easy dinner recipes with an oven. 

Frequently Asked Questions 

As oven users, when using this practical kitchen supporting equipment, you are likely to come up with other concerns, including:

  1. Do I Need to Preheat All Ovens?

Apart from electric and gas ones, as mentioned before, there are various other types of ranges offered in the market, such as a rotisserie, toaster, convection ovens, and so on. 

In case you own one of those less commonly-used devices and wonder if you need to preheat them, the answer is yes. These kinds of ovens may be different in terms of function, features, etc., but all require heating ahead of time.

Click here to find different figure types of oven. 


2. Why Does My New Oven Take Longer to Preheat?

If you have bought a designed one recently, you will notice that it may need more time than before to preheat. According to the appliance’s manufacturers and designers, this is mainly because the new model is considerably larger to meet the customers’ needs. 

It means that customers desire to have more space inside the oven to cook more food at one time. As a consequence, they require more time to heat up compared to traditional and old ones. 

Besides, if your device preheats much beyond usual, you can first switch off the breaker after 30 seconds so that the oven can be sufficiently robust.

Wrapping Up

In conclusion, the answer for how long it takes to preheat an oven to 400°F would vary greatly. Although most people would spend from 17 to 20 minutes preheating, others may require more or less this period depending on various factors mentioned above. Hopefully, after reading this blog, you can apply it to your circumstances.