Marathon Planner Calculator

Creates a simple plan estimate for the goal: marathon.

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Result

Weekly plan summary

16-week plan to 42.2 km race

Weekly target

Build to 4.6 km long run by week 16

Marathon Planner Calculator — How It Works

Creates a simple plan estimate for the goal: marathon. Try the Marathon Planner Calculator — instant results in your browser.

Enter your measurements or activity details. Results update live. These are estimates for planning — not medical advice.

Yes — runs locally in your browser.

Use results for general fitness planning. Consult a healthcare professional for medical decisions.