Running Pace Calculator
Calculate running pace, time or distance.
📐 Pace = Time ÷ Distance · Time = Distance × Pace · Distance = Time ÷ Pace
The running pace calculator converts between pace (time per kilometre or mile), speed (km/h or mph), and total finish time for any distance. Whether you are training for a 5K, 10K, half marathon, or full marathon, knowing your target pace is essential for structuring workouts and predicting finish times. Enter any two of the three values — distance, time, or pace — and the calculator finds the third.
📋 How to Use This Calculator
Select what you want to calculate: Pace, Finish Time, or Distance. Enter the two known values and click Calculate. For example, to find your finish time for a 10K at 6:30/km pace, select Finish Time, enter 10 km and 6:30/km pace — the result is 1:05:00. To find the pace needed to run a half marathon in under 2 hours, enter 21.1 km and 2:00:00 — the required pace is 5:41/km. Common race distances: 5K, 10K, Half Marathon (21.097 km), Full Marathon (42.195 km).
💡 Key Facts & Information
Running pace zones: Easy/Recovery (conversational pace, 70–75% max heart rate), Aerobic Base (75–80% HR), Tempo/Threshold (comfortably hard, 80–87% HR, can sustain 20–60 min), Interval (hard, 87–92% HR, 3–8 min repeats), Repetition (very hard, 95–100% HR, 30 sec–2 min). For beginners, the most common mistake is running every run too fast. Building aerobic base requires 80% of runs at easy pace. Elite marathon pace in India: men around 3:00/km (2:06 finish), women around 3:30/km (2:28 finish). A sub-4:30/km pace for any distance requires strong aerobic fitness developed over months.