Predict my time?

Former Member
Former Member
Hi all, I'm wondering if anyone is aware of any online calculators you can use to predict your time in an event. For example, "I swam 100m free in 1:28, what would I be able to swim the 800m free in?" I know this wouldn't be an absolute predictor, just something to give myself an idea of where I would be in the various events, without having to go out and swim them all in competition. :-) Many thanks, Canuck