Pace tells you how long it takes to cover one kilometer or one mile. It is the easiest way to plan a run, track progress, and set a goal for race day.
The Pace Formula
Pace = total time ÷ distance
Speed = distance ÷ time
Worked Example
You run 5 km in 28 minutes 30 seconds.
- 28.5 minutes ÷ 5 km = 5.7 min/km, which is 5:42 per km
- To convert to miles, multiply by 1.609: 5.7 × 1.609 = about 9:10 per mile
- Speed = 60 ÷ 5.7 = about 10.5 km/h
Estimating Finish Times at the Same Pace
At a steady 5:42 per km, the math gives:
| Distance | Finish time |
|---|---|
| 5 km | 28:30 |
| 10 km | 57:00 |
| Half marathon (21.1 km) | about 2:00:15 |
| Marathon (42.2 km) | about 4:00:30 |
Keep in mind that longer races are harder to hold at the same pace, so real marathon times are usually slower than a straight calculation.
How to Improve Your Pace
- Run most of your weekly miles at an easy, conversational pace.
- Add one faster session per week, such as intervals or a tempo run.
- Increase weekly distance by no more than about 10% at a time.
- Include rest days and strength work to reduce injury risk.
Use the Calculator
Enter your distance and time into a pace calculator to get pace and speed instantly. To see how hard you should be working, check your target heart rate zones, and estimate your workout energy with a calories burned calculator.
FAQ
What is a good running pace? It depends on age, fitness, and goals. Compare yourself to your own past runs rather than to others.
Should I run every run at race pace? No. Easy runs build endurance, and hard sessions should be limited.
How do I convert min/km to min/mile? Multiply by 1.609.
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