Running Split Calculator (5K, 10K, Half Marathon & Marathon)

Use our free running split calculator to plan your race pacing strategy. Enter your target time and distance to see your ideal splits per kilometre or mile. Perfect for 5K, 10K, half marathon and marathon runners.

What Is a Running Split Calculator?

A running split calculator helps you break down your target race time into smaller segments, such as per kilometre or mile splits. This allows you to pace yourself evenly and avoid going out too fast or fading at the end of a race.

Why Splits Matter

• Helps you maintain a consistent pace
• Prevents early fatigue
• Improves race performance
• Builds confidence on race day

How to Use This Tool

• Select your race distance
• Enter your target finish time
• View your splits instantly

Pacing Tips for Race Day

• Start slightly slower than goal pace
• Settle into a consistent rhythm
• Push in the final third of the race