How many calories does swimming burn?

[Olivetti]

Say 30 mins at moderate pace

It depends how much you weigh. If you weighed 10 stone it would be about 200 and if you weighed 15 stone it would be closer to 300. Here's a calculator you can use to figure it out:

www.healthstatus.com/cgi-bin/calc/calculator.cgi

I've been swimming for two weeks now (two evenings each week - doing 30/40 mins non-stop swimming at moderate to fast speed, probably around 40 to 46 lengths). Have no idea what I'm burning but it's working well for me, I am already noticing a difference, jeans much slacker than two weeks ago. I would love to swim more each week but cannot afford it. :( Using exercise bike the rest of the time. Good luck :)