Pace, Time & Distance
Solve for any variable
| Race | Distance | Finish Time |
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Pacing Strategy Guide
The difference between a great race and blowing up often comes down to pacing.
Even vs. Negative Splits
The most reliable race strategy is even pacing -- running each mile at roughly the same speed. Slightly negative splits (running the second half faster) often produce personal bests because you avoid early fatigue.
The "too fast" trap: Going out 10-15 seconds per mile faster than your target pace can cost you 30+ seconds per mile in the final third of a race. Disciplined early pacing pays dividends late.
Common Target Paces
- Elite marathon: ~4:35-5:00 min/mile (2:01-2:10)
- Sub-3 marathon: 6:52 min/mile or faster
- Sub-4 marathon: 9:09 min/mile or faster
- Sub-2 half marathon: 9:09 min/mile
- Sub-25 5K: 8:03 min/mile
- Beginner 5K: 10-13 min/mile
Pace vs. Speed
Pace is the time it takes to cover a unit of distance (e.g., 8:30 per mile). Speed is the distance covered per unit of time (e.g., 7.1 mph). Runners typically think in pace; cyclists in speed.
To convert: Speed (mph) = 60 / pace (min/mile). For example, a 10:00 min/mile pace = 6.0 mph.
How to Use This Pace Calculator
This calculator solves the fundamental pace equation three ways: given any two of pace, distance, and time, it calculates the third. Use it for training runs, race planning, or comparing your performance across different distances.
Planning Your Race
Enter your goal race distance and target pace to see your projected finish time. Then check the split table to see what that pace looks like across standard race distances. This helps you set realistic goals -- if your 5K pace predicts a 4:30 marathon, that tells you something about the effort required.
Training Runs
Use the "Solve for Pace" mode after a training run to calculate your average pace. Enter the distance you ran and total time elapsed. Compare this to your target race pace to gauge fitness. Easy runs should typically be 1-2 minutes per mile slower than your race pace.