Three-way calculation
Calculate any one of pace, time, or distance from the other two — useful for training planning, race prediction, and pacing strategy.
Running Pace Calculator
Running Pace Calculator
Calculate your running pace (min/km & min/mile), finish time, and target distance.
Distance & Time
Target Pace Output
Pace / KM
5:00 /km
Pace / Mile
8:02 /mi
Total Distance: 10.00 km (6.21 miles)
Speed: 12.00 km/h (7.46 mph)
How It Works & Methodology
Running pace measures the rate of activity expressed as the amount of time (minutes and seconds) required to cover one kilometer or one mile. In contrast, speed measures the distance covered per unit of time (such as km/h or mph).
Pace Formulas:
- Pace per km = Total Time (seconds) / Distance (km)
- Pace per mile = Total Time (seconds) / Distance (miles)
- Speed (km/h) = Distance (km) / [Total Time (seconds) / 3600]
Heart Rate Training Zones & Aerobic Threshold
Endurance runners utilize heart rate training zones to structure workouts for optimal aerobic endurance and recovery:
- Zone 1 (50–60% HRmax) - Active Recovery: Easy conversational effort that promotes blood flow and recovery.
- Zone 2 (60–70% HRmax) - Aerobic Base: The cornerstone of marathon base building; burns primarily fat for fuel.
- Zone 3 (70–80% HRmax) - Tempo: Moderate effort improving aerobic capacity and stamina.
- Zone 4 (80–90% HRmax) - Lactate Threshold: Hard effort right at the point where lactic acid begins accumulating in the blood.
- Zone 5 (90–100% HRmax) - VO2 Max / Anaerobic: Maximum interval sprints for short bursts of speed.
Frequently Asked Questions
How to use Running Pace Calculator
- 1
Select what you want to calculate: pace, time, or distance.
- 2
Enter two of the three values (any combination of pace, time, and distance).
- 3
Choose your preferred units: km or miles.
- 4
Read the calculated third value along with finish time projections for common race distances.
Why use this tool?
Race finish time predictions
Automatically projects finish times for 5K, 10K, half marathon, and marathon based on your current pace.
km and miles support
Switch instantly between kilometers per minute and minutes per mile with full unit conversion built in.
Frequently asked questions
What is a good running pace for beginners?
A comfortable beginner pace is typically 6:30–8:00 min/km (10:30–13:00 min/mile). The best guide is the "talk test" — you should be able to hold a conversation without gasping. Speed increases naturally as fitness improves.
How do I calculate my marathon finish time from my training pace?
Enter your training pace and a distance of 42.195 km (or 26.2 miles). The calculator will compute the projected finish time. Note that race-day pace is often slightly faster due to adrenaline, but slower for untrained distances.
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 the most efficient pacing strategy for distance running and often results in a personal best time.
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