What's a good first marathon time?
4:00-5:00 is common for first-timers. Focus on finishing over time for your first race.
Health Fitness
Marathon Pace Calculator
Estimate marathon pace with quick inputs.
Fast, practical estimates
Adjust inputs for the most useful result.
What this calculator does
A marathon pace calculator determines the per-mile or per-kilometer pace needed to finish 26.2 miles (42.195 km) in your target time. Marathon pacing requires careful planning—starting too fast leads to hitting 'the wall' around mile 20.
How it works
Divide target time by 26.2 miles or 42.195 km. The calculator shows mile splits and suggests training paces.
Formula
Pace = Target Time ÷ 26.2 miles. Example: 4:00:00 ÷ 26.2 = 9:10/mile.
Tips for using this calculator
- Start 10-15 seconds slower than target pace
- Negative split (faster second half) is ideal strategy
- Practice race pace in long runs
- Use half marathon time × 2.1 to estimate marathon time
- Account for hills, weather, and crowd congestion
Frequently asked questions
Why do I slow down late in the race?
Glycogen depletion ('the wall') typically hits around mile 18-22. Proper fueling and pacing help prevent this.
How should I pace my marathon?
Even or negative splits. Start slightly slower, maintain through mile 20, then push if feeling strong.