🏃 Running Pace Calculator
Calculate pace, finish time, or required pace for 5K, 10K, half marathon, and marathon.
🏃 Pace Math
Pace
Time ÷ Distance
min/km or min/mile
Race prediction
Riegel formula
Pace slows ~6% per distance doubling
Running pace is time per unit distance. This tool converts between pace, speed, and finish time, and predicts race times.
🏅 Typical Times
💡 Pacing Tips
- ✓Negative split: finish faster
- ✓Start 10–15s/km slower than target
- ✓Even pacing is most efficient
- ✓Practice race pace in training
- ✓Adjust for hills and heat
📎 Also Try
Formula, sources and limitations
How this estimate is produced
A formula-specific external evidence record has not yet been published for this tool. Treat the result as an unreviewed educational estimate, not professional advice.
A citation describes the source method; it does not mean this website or its implementation has been clinically validated or independently reviewed. See the methodology, editorial policy, and medical disclaimer.
The Art of Pacing
Starting too fast leads to glycogen depletion. Even pacing or slight negative splits produce the fastest times.