Free Running Pace & Race Split Calculator (5K, 10K, Half, Marathon) Online
Calculate required running pace per kilometer or mile to hit your target finish time for 5K, 10K, Half Marathon, and Full 42.195km Marathon. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Distance
Choose 5K, 10K, Half Marathon (21.1 km), Marathon (42.2 km), or custom km/miles.
Enter Target Finish Time
Input hours, minutes, and seconds (e.g., 3:45:00 for sub-3:45 marathon).
Review Required Pace
Inspect average pace (min/km and min/mile) and speed in km/h or mph.
Print Mile/KM Split Table
View cumulative checkpoint times for every kilometer.
Frequently Asked Questions
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