How Long to Preheat Oven? (Complete Guide)

Preheating the oven

Preheating the oven is a key step in cooking every dish that requires baking. However, how long you preheat the oven can be a challenging aspect to figure out.

Different dishes require different preheating times and if you don’t get that right, you can compromise your entire meal. Usually, you need to give your oven between 10-15 minutes to heat up.

This timeframe, however, differs according to the type of oven you have and the meal you prepare. And even if the time might vary, it should never be shorter than 10 minutes if you want your oven to get to a pre-set temperature.

Consider this table so you can get an idea of how much preheating different dishes need. All recipes are different and they require different temperatures to get cooked properly. You will find the temperature you need in each recipe as well.


Preheating time 

Temperature set


15-17 minutes

400 F


15-20 minutes 

475 F

Frozen pizza 

15-20 minutes 

450 F


12-15 minutes 

375 F


10-15 minutes 

275 F


15-17 minutes 

400 F

Beef and pork 

15-17 minutes 

400 F 

How Do You Know When the Oven is Preheated?

To know if your oven reached the preferred temperature, you will have to follow the instructions of the device you have. Different oven models have different settings and features and they let you know they are preheated in different ways as well.

If your oven comes with an LCD screen, you will be able to see a notification on the screen that informs you regarding the temperature of the oven. At the same time, your oven might make a beep or another sound in order to let you know that it is preheated.

There are also ovens that come with a light that turns on when the oven is preheating and it will turn off when it got to the temperature you want.

However, if your oven doesn’t come with such features, you can use a food thermometer. Make sure it is an oven-safe thermometer. Just place the food thermometer inside the oven and check the temperature by checking the thermometer.

Can You Preheat an Oven for Too Long?

If you have a signal to know when the oven is preheated, you are not at risk to preheat it for too long. However, if your oven doesn’t come with such notification and you are not using a thermometer to check the temperature, you might preheat it for more than you have to.

Preheating your oven more than you have to, will not necessarily affect the quality of your cooking. It will though, waste energy that you don’t have to consume. Your oven will most likely maintain the set temperature once it reached it so you can still cook your food safely.

Pizza in Toaster Oven

How Do You Preheat an Oven to 400?

The need to preheat your oven to 400 degrees F or 204 degrees C is the most common in all recipes.

The general rule says that you need to preheat your oven for about 15 minutes to reach a temperature of 350 degrees F. So, you will need to give it an extra couple of minutes to get to the desired 400 degrees F.

So, you should be able to get your oven to the desired temperature in about 17 minutes. If your oven is an older model, you might even expect it to get to 400 degrees F in 20 minutes.

However, the newest models are made to decrease the preheating time to a minimum, thus you might get to this temperature in about 12 minutes.

How Long Does an Oven Take to Preheat to 180?

180 degrees F or 82 degrees, is a relatively low temperature for an oven so you can expect the preheating time to take as little as 10 minutes.

For gas ovens, on the other hand, this preheating time might take longer as in closer to 15 minutes.If your oven takes more than 15 minutes to reach a temperature of 108 degrees F, it might be a good idea to check with your electrician as you might need to repair your appliance.

Does the Oven Beep When it’s Done Preheating?

Many ovens will make a sound when they reach the pre-set temperature. But this is not the norm. Therefore, if you have an older model, it might not make the beep that lets you know it is ready to cook your food.

Some units give a light notification instead of a sound notification. Also, you will find newer models of ovens that let you know when the temperature is reached on the LCD screen.

The best way to know when your oven is preheated is to check the instructions. If you lost them you can check on the manufacturer’s website and look for your model to find the instructions.

What Happens if You Don’t Preheat the Oven for Baking?

Not preheating your oven for cooking is risky. Your dish will not get cooked the way you expect it and it will not have the texture you aim to obtain.

The main disadvantage of cooking in an oven that is not preheated is that you will not get the crust on the food that you want.

Also, if you fail to preheat your oven, you will notice that your food is steaming and not roasting or baking. This can lead to uneven cooking and even burned food.

Once the oven reaches the pre-set temperature, your food will get from steaming to baking and this will affect its texture as well as its appearance.

If you use your oven to bake cakes or cookies without preheating it, the dough will not rise since there is not enough heat for that, thus your cookies will not look as you want them to look. They will be smaller than if you cooked them in a preheated oven.

Also, if your oven is not preheated, you will notice that the food takes longer to cook. This could be a big disadvantage if you are in a hurry.

People think that preheating the oven is a waste of energy when, in fact, it is the opposite. Without preheating your oven, you will spend more time cooking. Furthermore, you will waste a lot more energy than if you simply preheat your oven.


As you can see, preheating your oven is a necessary aspect of all the baked dishes.

Depending on the type of oven you have, this might take more or less time. It is super important not to skip the preheating phase. Otherwise, your food will not cook properly.

Preheating your oven will help you save energy since the cooking time will be significantly reduced. Make sure to check the recipe as it should specify how long you have to preheat your oven and at what temperature in order to get your dish just right.

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