Half Marathon Pace Calculator
Calculate your half marathon pace from finish time. Enter your target finish time in hours to get pace per km or mile, speed, and comparison charts for runners and walkers.
About This Calculator
The Half Marathon Pace Calculator helps runners and walkers determine their exact pace per kilometer or per mile based on their target half marathon finish time. Whether you're training for your first half marathon, aiming for a personal best, or planning your race strategy, this tool provides instant pace, speed, and distance breakdowns.
The formula used is simple: Pace = Total Time ÷ Distance. A half marathon is 21.0975 kilometers (13.109 miles). Enter your target finish time in hours, and the calculator divides by the distance to find your pace in minutes per km or minutes per mile. It also computes your speed by dividing distance by time — Speed = Distance ÷ Time.
If you run a half marathon in 2 hours (120 minutes), your pace is 5:41 per kilometer and your speed is 10.55 km/h. In miles, that converts to 9:09 per mile at 6.56 mi/h. The tool displays both metric and imperial paces in the comparison chart so you can easily understand your performance regardless of your region.
Regional Notes
India: Runners in India typically use kilometers. Common half marathon finish times range from 1:45 to 2:30 for recreational runners. Major events include the Mumbai Half Marathon and Delhi Half Marathon.
US: Imperial units are common — pace is often quoted in minutes per mile. A 2-hour half marathon equals 9:09/mi. Popular races include the NYC Half and Atlanta Half Marathon.
UK: The UK uses both metric and imperial. Many events display pace in min/mi while distances are in km. The Great North Run is the world's largest half marathon with over 50,000 participants. Pace charts at events typically show both units.
Frequently Asked Questions
How do I calculate my half marathon pace?
To calculate your half marathon pace, divide your finish time by the race distance. A half marathon is 21.0975 km (13.109 miles). If you finish in 2 hours (120 minutes), your pace is 120 ÷ 21.0975 = 5 minutes 41 seconds per kilometer, or 120 ÷ 13.109 = 9 minutes 9 seconds per mile.
What is a good half marathon pace for a beginner?
A good half marathon pace for a beginner runner is typically between 6 to 7 minutes per kilometer (9:39 to 11:16 per mile), which corresponds to a finish time of 2 hours 7 minutes to 2 hours 28 minutes. For walkers, a comfortable pace is 9 to 12 minutes per kilometer (14:29 to 19:19 per mile).
How do I convert half marathon pace from min/km to min/mile?
To convert half marathon pace from min/km to min/mile, multiply your min/km pace by 1.609. For example, 5 min/km = 5 × 1.609 = 8:03 per mile. Our calculator shows both metric and imperial paces in the Pace Comparison chart.
What is the world record half marathon pace?
The men's half marathon world record is 57:30 (set by Yomif Kejelcha in 2024), which is a pace of 2:44 per km or 4:23 per mile. The women's record is 1:02:52 (set by Ruth Chepngetich in 2021), which is 2:59 per km or 4:48 per mile.
How can I improve my half marathon pace?
To improve your half marathon pace, incorporate tempo runs at your goal race pace, long runs to build endurance, interval training for speed, and strength training for injury prevention. Increase weekly mileage gradually by no more than 10% per week and include rest days for recovery.
What pace is needed for a 1 hour 30 minute half marathon?
A 1 hour 30 minute half marathon requires a pace of 4 minutes 16 seconds per kilometer or 6 minutes 52 seconds per mile. This is considered an advanced recreational time and requires sustained training with weekly mileage of 50-70 km (30-45 miles).
What is the difference between pace and speed in running?
Pace is the time it takes to cover a unit of distance (minutes per km or per mile), while speed is distance covered per unit of time (km/h or mi/h). A faster runner has a lower pace number (fewer minutes per km) but a higher speed number.
How many kilometers is a half marathon?
A half marathon is exactly 21.0975 kilometers or 13.109 miles. The distance was standardized by the IAAF (now World Athletics) and is exactly half of a full marathon distance of 42.195 km.