It depends on the type of oven you’re using. If we’re talking about a wood-fueled oven, it will take up to 30-40 minutes to preheat, and just over a minute and a half to cook the pizza, which means that your pizza should be ready within 40-45 minutes. Other ovens like the portable conversion kits take 3 minutes to heat and 3 minutes to cook your pizza, meaning that within those 10 minutes, your pizza will be ready. But don’t forget that you will need to prepare your grill beforehand. Generally, outdoor pizza ovens can take up to 10 minutes to heat and another 5-10 minutes to cook. This time varies based on the oven you get.