🏃 Running Pace & Split Calculator
Calculate running pace per kilometer and per mile, speed in km/h and mph, and projected race finish times for 5K, 10K, Half Marathon, and Full Marathon.
Free No Signup Required Browser-Based
Pace Per Mile
8:03 /mile
Speed: 7.46 mphPace Per Kilometer
5:00 /km
Speed: 12.00 km/hProjected Race Finish Times at this Pace
5K (3.11 mi)
25:00
10K (6.21 mi)
50:00
Half Marathon (13.11 mi)
1:45:29
Marathon (26.22 mi)
3:30:59
How to Use Running Pace & Split Calculator
- Select a race distance preset (5K, 10K, Half Marathon, Marathon) or enter custom distance
- Input your target or achieved time in hours, minutes, and seconds
- View your exact pace per km, pace per mile, speed, and projected race split times
📖 Technical Encyclopedia & Standards Reference
Calculate running pace per kilometer and per mile, speed in km/h and mph, and projected race finish times for 5K, 10K, Half Marathon, and Full Marathon. This tool computes outputs according to official open technical and scientific specifications.
✓ Open Standards AlignmentCompliant with ISO/IEC, W3C, NIST, and standard mathematical formulations.
✓ 100% Client-Side / SecureZero server logging. Computations execute entirely in your local browser sandbox.
Explore more formulas in our Tools Encyclopedia & Glossary →
Frequently Asked Questions
How do you calculate running pace?
Pace is calculated as Total Time divided by Total Distance: Pace = Time / Distance (e.g., 25 minutes for 5 km = 5:00 min/km pace).
What is a good 5K running pace for beginners?
A beginner 5K pace is typically between 6:00 and 7:30 min/km (9:40 to 12:00 min/mile), finishing in 30 to 38 minutes.