Half Marathon Pace Calculator

Calculate half marathon race pace

Target Time
Pace Results
Required Pace
0:00 min/km
Target Time: 0:00:00
Distance: 21.1 km (13.1 miles)
Pace (min/mile): 0:00
Speed: 0 km/h
5K Split: 0:00:00
10K Split: 0:00:00
15K Split: 0:00:00

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What is Half Marathon Pace Calculator?

This half marathon pace calculator helps you determine the required pace per kilometer (or mile) to achieve your target half marathon finish time. A half marathon is 21.0975 kilometers (13.1 miles), a popular distance that bridges the gap between 10K and full marathon.

The calculator shows your required pace in both metric and imperial units, speed in km/h, and split times for 5K, 10K, and 15K checkpoints. Use this to plan your race strategy and practice the required pace in training. The half marathon requires both endurance and speed, making pace management crucial.

How to Use This Calculator

Step 1: Enter your target half marathon finish time in hours, minutes, and seconds.
Step 2: Click "Calculate" to see your required pace and split times.
Step 3: Review the required pace per km/mile and speed.
Step 4: Check split times for 5K, 10K, and 15K checkpoints.
Step 5: Practice this pace in training to ensure it's realistic.
Step 6: Use the pace to plan your race-day strategy.

Half Marathon Pace Examples

Example 1 - 2 Hour Half Marathon: Target: 2:00:00. Pace: 5:41 min/km (9:09 min/mile), Speed: 10.5 km/h.

Example 2 - 1:45 Half Marathon: Target: 1:45:00. Pace: 4:58 min/km (8:00 min/mile), Speed: 12.1 km/h.

Example 3 - 1:30 Half Marathon: Target: 1:30:00. Pace: 4:16 min/km (6:52 min/mile), Speed: 14.1 km/h.

Example 4 - 2:30 Half Marathon: Target: 2:30:00. Pace: 7:06 min/km (11:24 min/mile), Speed: 8.4 km/h.

Example 5 - 1:15 Half Marathon: Target: 1:15:00. Pace: 3:33 min/km (5:43 min/mile), Speed: 16.9 km/h.

Example 6 - 2:15 Half Marathon: Target: 2:15:00. Pace: 6:23 min/km (10:17 min/mile), Speed: 9.4 km/h.

Example 7 - 1:40 Half Marathon: Target: 1:40:00. Pace: 4:44 min/km (7:36 min/mile), Speed: 12.7 km/h.

Frequently Asked Questions

What is a good half marathon time?
Good half marathon times vary: Sub-1:30 is elite, 1:30-2:00 is advanced, 2:00-2:30 is intermediate, and 2:30-3:00 is beginner. Finishing a half marathon at any pace is a significant achievement.
How does half marathon pace compare to marathon pace?
Half marathon pace is typically 15-30 seconds per km faster than marathon pace. Since the distance is half, you can maintain a higher intensity. Use half marathons to build toward full marathons.
How should I pace a half marathon?
Start at or slightly slower than goal pace for the first 5K. Maintain goal pace through 15-16K, then assess. If feeling strong, increase slightly. If struggling, focus on maintaining pace to finish. The final 5K is where races are won or lost.
What's a good training plan for half marathon?
A typical plan is 12-16 weeks with 3-4 runs weekly: one easy run, one tempo/speed workout, one long run (gradually increasing to 16-18km), and optional cross-training. Taper in the final 2 weeks.
How do I fuel for a half marathon?
For races under 2 hours, water is usually sufficient. For 2+ hours, consider consuming 30-60g of carbs per hour through gels or sports drinks. Practice fueling during long training runs to find what works for you.
Can I walk during a half marathon?
Yes, many runners use walk-run strategies, especially beginners. Walking through aid stations or on hills can help manage effort. The key is consistency - even if you walk, maintain forward progress.