Running Pace Calculator: Find Your Pace, Speed, and Race Finish Times
Whether you are training for your first 5K or targeting a marathon personal best, understanding your running pace is essential. Pace tells you exactly how you are running right now; predicted race times show what you will achieve if you maintain it; and split times give you a kilometre-by-kilometre roadmap for race day.
Enter any distance and time to get pace per km, pace per mile, speed in km/h and mph, predicted finish times for all major race distances, and cumulative split times.
Pace calculation formulas:
Training Pace Zones
Easy / Recovery Pace: 60-70% max heart rate. Comfortable conversation. Use for most training runs (80% of volume). Typically 1-2 min/km slower than race pace.
Tempo / Threshold Pace: Comfortably hard. Can maintain for ~1 hour. Improves lactate threshold. Approximately your 10K race pace.
Interval Pace: Hard effort, 400m-1km repeats. Improves VO2 max. Approximately 5K race pace or faster.
Race Pace: The specific pace for your goal race time. Practice this pace during workouts.
Common Race Pace Targets
5K in 25:00 requires 5:00/km (8:03/mi)
10K in 50:00 requires 5:00/km (8:03/mi)
Half Marathon in 2:00:00 requires 5:41/km (9:09/mi)
Marathon in 4:00:00 requires 5:41/km (9:09/mi)
Marathon in 3:00:00 requires 4:16/km (6:52/mi)
Marathon in 3:30:00 requires 4:58/km (8:00/mi)
Practical Examples
Find marathon finish time
- 1.Mode: Distance + Time to Pace
- 2.Set: Distance 42.195 km
- 3.Enter: your recent long run time
- 4.See: predicted marathon finish time
Target sub-30 minute 5K
- 1.Mode: Distance + Time to Pace
- 2.Distance: 5 km, Time: 0:29:59
- 3.Get pace: 5:59/km needed
- 4.Practice: this pace in tempo runs
Frequently Asked Questions
What is running pace?
Running pace is the time it takes to cover one unit of distance, expressed as minutes:seconds per kilometre (min/km) or minutes:seconds per mile (min/mi). For example, a 5:30/km pace means you run each kilometre in 5 minutes and 30 seconds. Pace is the inverse of speed - a faster runner has a lower pace number.
How do I calculate my pace from distance and time?
Pace = Total Time / Distance. Example: If you run 10km in 55 minutes: Pace = 55 / 10 = 5.5 minutes per km = 5:30/km. In seconds: (55 x 60) / 10 = 330 seconds/km = 5:30/km. The calculator does this automatically when you enter distance and time.
What is a good running pace?
Beginners: 8-12 min/km (12-19 min/mile). Intermediate runners: 5-7 min/km (8-11 min/mile). Advanced runners: 4-5 min/km (6-8 min/mile). Elite runners: Under 3 min/km (under 5 min/mile). A comfortable conversational pace is generally a good training pace for base building.
What pace do I need to run a sub-2 hour half marathon?
A sub-2 hour half marathon requires completing 21.0975km in under 120 minutes. Required pace: 120 / 21.0975 = 5.687 min/km = 5:41/km (or 9:09/mile). Enter distance 21.0975 km and time 1:59:59 in the calculator to verify your target pace.
What pace do I need to run a sub-4 hour marathon?
A sub-4 hour marathon requires completing 42.195km in under 240 minutes. Required pace: 240 / 42.195 = 5.688 min/km = 5:41/km (or 9:09/mile). This is the same pace as a sub-2 hour half marathon. Use the calculator to find your exact required pace for any goal time.
What is the difference between pace and speed?
Pace = time per unit of distance (e.g. 5:30 min/km). Speed = distance per unit of time (e.g. 10.9 km/h). They are inverses: Speed (km/h) = 60 / Pace (min/km). A 5:30/km pace = 60/5.5 = 10.9 km/h. Speed is used on treadmills; pace is used by most runners and GPS watches.
What is a negative split in running?
A negative split means running the second half of a race faster than the first half. It is considered the optimal race strategy because it conserves energy early and finishes strong. For example, running a 10K with a 5:40/km first 5K and 5:20/km second 5K is a negative split. Many world records are set with negative splits.
How do I use split times in training?
Split times show your cumulative time at each kilometre or mile marker. They help you: pace yourself during a race (check your watch at each km marker), plan your race strategy, identify where you typically slow down, and set intermediate targets during training runs. Aim to hit each split within 5-10 seconds of your target pace.