Select a previously completed running effort/race from the list, specify your time and press calculate. Predictions of finishing times for a range of other distances/trails will be calculated based on your input. The predictions can be improved by adding a second running effort. Press the toggle button and input fields for a second race will appear. If you change distance/trail in any of the two lists, the predictions will be updated automatically. If you change your running time, you need to press the calculate button to update the predictions.
distance hh mm ss