The number of calories in a bag of popcorn can vary depending on several factors, including:
* **Type of popcorn:** Air-popped popcorn has the fewest calories, followed by microwave popcorn, and then kettlecorn which often has added sugar.
* **Brand:** Different brands of popcorn use different ingredients and amounts of oil and butter, which can affect the calorie count.
* **Serving size:** The bag size itself can vary greatly, so the number of calories per bag will also vary.
Here's a general guideline:
* **Air-popped popcorn:** Around 100 calories per 3 cups (about 24 grams)
* **Microwave popcorn:** Between 150-300 calories per bag (depending on size and brand)
* **Kettlecorn:** Around 180-200 calories per cup (due to added sugar)
To find out the exact number of calories in a bag of popcorn, you can:
* Check the nutrition label on the bag. This will tell you the calories per serving and the serving size.
* Look up the specific brand and type of popcorn online. The manufacturer's website or a nutritional database should have the calorie information.