Instructions
Fill in the fields above, leaving out the value you want to calculate. Then click the appropriate button. For example, if you want to know how far you'll go in 7 minutes with a split time of 1'38", Type 1 in the Split Minutes field, 38 in the Split Seconds Field, and 7 in the Total Time Minutes field. Then just click the Distance button, and the answer appears in the Distance box. The program will complain if you try to do something silly (like a split time of 0'00")

Written by Simon Kenyon of Thames Tradesmen's Rowing Club, during a particularly boring lunchbreak.