The information displayed in the Open Water Swim Predictor is a best-guess estimate only, and is not meant to be a precise measure of performance. The equations behind the predictor are fit to the past performances of athletes working with Dobkanize.com correlated to their open water race swimming times. As every athlete is different, your open water swim times may vary. Likewise a significant source of variation may come from the triathlon swim venue. Drafting, current and sighting are all factors that may impact results. Use this calculator to get a rough idea of how fast your competitors are swimming in the pool, or to get an idea of how fast you have to be in the pool to beat them on race day!