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Health, Fitness & Sports

Marathon Pace Calculator.

Training inputs and results stay in this browser. Calculate target pace and kilometer/mile splits for a marathon time. Uses local formulas and independent verification.

Use Marathon Pace Calculator

Private in this browser. Sports inputs and results stay in this browser.

Tool options
Preparing the local tool…

How it works

  1. 01

    Enter time, distance or equipment values in the labeled fields.

  2. 02

    Run the bounded local estimate.

  3. 03

    Review units, assumptions and rounding.

Frequently asked questions

Does this predict actual performance?

No. It applies ideal arithmetic to entered values and cannot predict terrain, fatigue or individual performance.

Does Marathon Pace Calculator upload my data?

Marathon Pace Calculator runs locally in your browser. Sports inputs and results stay in this browser.

What output does Marathon Pace Calculator create?

Marathon Pace Calculator creates Json output after the result passes its local verification checks.

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