Marathon Pace Calculator

Plan marathon pace strategy and split times.

Target Pace
10K Split
Halfway (21.1K)
30K Split
40K Split
Finish Time

Marathon Pacing Strategy

Proper pacing is crucial for marathon success. Starting too fast leads to hitting the wall at 30-35K. Even pacing or negative splits (second half faster) are optimal strategies. Most runners slow in the second half despite intending even pace.

Pacing Strategies

Even Pace: Same pace throughout. Most efficient physiologically.
Negative Split: First half slightly slower, second half faster. Safest strategy, requires discipline early.
Positive Split: First half faster - leads to severe slowdown. Avoid this.
Banking Time early rarely works due to glycogen depletion and fatigue.

Marathon Race Tips

Start conservatively - first 5K should feel easy. Hit your pace by 10K, not from the start. Fuel every 5K (gels/sports drinks). Run the tangents (shortest line). Mental checkpoints: 10K, halfway, 30K, 35K. Final 7K is mental - dig deep. Kick in last km if able.

Quick Tips

  • BMI alone doesn't reflect overall health
  • TDEE varies based on activity level
  • Consult a healthcare professional for medical decisions

Frequently Asked Questions

Yes, first 5K should be 10-15 seconds per km slower. Hit goal pace by 10K.

Resist the temptation. You'll pay for it after 30K. Trust your plan.

30-35K when glycogen depletes. Proper pacing and fueling delay or prevent it.

Goal is even pace or slight negative split. Expect 5-10% slowdown for most runners.

Easy runs: 60-90 sec/km slower than race pace. Long runs: 30-60 sec/km slower.