How to Use the Running Pace, Split & Finish Time Calculator
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1
Choose which metric you want to calculate: Pace (from Distance & Time), Time (from Distance & Pace), or Distance (from Time & Pace).
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2
Select a standard race preset: 5K, 10K, Half Marathon (21.1 km), Marathon (42.2 km), or enter a custom distance.
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3
Input your target time or current training pace.
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4
Review your pace formatted in both Minutes per Kilometer (min/km) and Minutes per Mile (min/mi), plus speed in km/h and mph.
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5
Inspect the kilometer-by-kilometer split table to plan your pacing strategy on race day.
Practical Example & Use Case
Common Real-World Scenario
Planning a sub-4 hour marathon requires maintaining a steady pace of 5:41 min/km (9:09 min/mi) for 42.195 kilometers.
Technical Notes & Limitations
Browser Engine Architecture
Calculates even splits across flat courses. Real races require accounting for elevation gains, headwind, and aid station stops.
Frequently Asked Questions
How do I convert min/km to min/mile?
Multiply your total seconds per kilometer by 1.60934. For example, 5:00 min/km (300 sec) equals 482.8 seconds per mile, or 8:03 min/mile.