Enter any two of distance, time and pace to calculate the third — plus get predicted finish times for 5K, 10K, half marathon and marathon from your current fitness.
Divide your total time in minutes by the distance. For example, 50 minutes for 10 km = 5:00 min/km. This calculator does it instantly and converts between min/km and min/mile.
Most beginners run 6:30–8:00 min/km (10:30–13:00 min/mile). Consistency matters more than speed — build distance first, speed follows.
Predictions use the Riegel formula (time × (new distance ÷ old distance)^1.06), the standard runners use. They assume similar training and conditions.
Multiply min/km by 1.609. So 5:00/km ≈ 8:03/mile. This calculator converts automatically.