Work out your running pace, finish time or distance by entering the two values you know. Fill in any two of distance, total time and pace, leave the third blank, and the calculator solves for the missing one, working in either miles or kilometers. Pace is shown in minutes and seconds per mile or kilometer, which is exactly how runners think about effort, and finish time is shown in hours, minutes and seconds. This is the everyday tool for planning a race, checking whether your training pace is on target, or converting a treadmill speed into a real-world pace. It handles the awkward minutes-and-seconds arithmetic so you do not have to. Everything is computed instantly and locally in your browser with nothing sent anywhere.