After inputting the time and distance, the calculation will show up in the textarea locate at the right. The first result is the pace (in miles per hour). The other results are the times for different distances at the original pace.
The time is entered in a hh:mm:ss format, where "hh" is hours, "mm" is minutes, and "ss" is seconds. This formatting is a little flexible. For example, if the time to be entered for 5000 meters is 15 minutes and 20 seconds, some ways it can be written are 00:15:20 or :15:20 or 15:20 If the time for 400 meters is 51 seconds, the simple way to write it is 51
The distance can be selected from a list or entered in. Select the appropriate radio (aka option) button. For "Select a distance", the drop-down list has some commonly raced distances. If the "Or enter customized" option is selected, the results will use the number entered in the text box. (Please enter only a number.) The measurement units are selected to the right of the text box (chose from miles, meters, and kilometers).
The constants used are 26.219 miles in a marathon, 1760 yards in a mile, 1000 meters in a kilometer, and 1609 meters in a mile.