Running Pace Calculator
Enter any two values — the third will be calculated.
Common Race Distances
What is a Running Pace Calculator?
A running pace calculator converts between three key variables: distance, pace (time per km or mile), and total finish time. Enter any two of the three and the calculator instantly derives the missing value — useful for race planning, training zone work, and reviewing past runs.
Whether you're training for a 5K or a marathon, knowing your target pace helps you run smarter and avoid going out too fast or too slow.
How to Use This Calculator
- Distance: Enter the race or run distance, and choose km or miles.
- Pace: Enter your target or actual pace in minutes and seconds per unit.
- Finish Time: Enter hours, minutes, and seconds for your goal or actual time.
- Leave one blank: The calculator fills in the missing field automatically.
- Quick-fill races: Use the race buttons (5K, 10K, Half, Marathon) to pre-fill the distance.
Frequently Asked Questions
What is a good running pace for beginners?
A comfortable beginner pace is typically 6–8 minutes per kilometer (10–13 min/mile). The key is being able to hold a conversation while running. Pace improves naturally with consistent training over weeks.
What pace do I need for a sub-2-hour half marathon?
To finish a half marathon (21.1 km) in under 2 hours, you need to maintain a pace faster than 5:41 per kilometer (9:09 per mile). Build to this gradually with structured training.
How do I convert pace to speed?
Divide 60 by your pace in minutes per km to get km/h. For example, a 5:00/km pace = 60/5 = 12 km/h. This calculator does this conversion instantly.
What is negative splitting?
Running the second half of a race faster than the first. It's a strategy used by elite runners to conserve energy early and finish strong, typically resulting in better overall times.