How many laps do you need to swim in a 50 meter pool to burn 500 calories?

Okay...i know that when i go to swim practice, i swim for a good hour and a half. i know that while im there(swimming constantly)i burn about 1200 calories. So, it doesnt matter how many laps you swim; its how long and how intense.

Your very welcome,

Grace Kelly

Katz5.....

well if you want laps, you would have to swim 10-12 laps; there and back counting as one lap. So if you did that you would burn 500 calories, and if you were in a 25 meter pool you would have to swim about 20 laps; there and back counting as one.