The act of turning on your oven and letting it heat up to the right temperature is referred to as "preheating." Because of how long it takes for an oven to warm up, most recipes will recommend that you turn your oven on first, before starting to cook.

How do I know when oven is done preheating?

Typically, when an oven has finished preheating, an indicator light will shut off, or a light will turn on when the oven reaches the right temperature. You can monitor the preheat cycle with animated timers and symbols on the display.

How long should an oven take to preheat?

1. How long do you have to preheat? Unless you are baking bread or pizza, you only need to preheat until the oven reaches the set temperature. This takes 15 to 20 minutes, depending on your oven and the intended temperature (read more about the particularities of ovens on this Hotline thread.