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Convert between race distance, pace and finish time — solve any missing piece.
Convert between race distance, pace and finish time — solve any missing piece.
Enter values above and click Calculate — results will appear here with the formula explained.
Pace is running's universal currency: minutes per kilometer (or mile). Any two of distance, time and pace determine the third, which makes the calculator useful in three directions — checking what a workout produced, planning a target, or projecting a longer race from a shorter effort.
Race projections assume equal pacing throughout. Real marathons slow as fuel depletes; experienced racers add 2–4% to projections beyond half-marathon distance as a fade allowance.
Convert between race distance, pace and finish time — solve any missing piece. Formula: pace = finish time ÷ distance. Example: A half marathon in 1:52:30 means 5:20/km pace (8:35/mile), projecting to roughly 3:45:15 for a full marathon at the same effort.
Pace is running's universal currency: minutes per kilometer (or mile). Any two of distance, time and pace determine the third, which makes the calculator useful in three directions — checking what a workout produced, planning a target, or projecting a longer race from a shorter effort.
Race projections assume equal pacing throughout. Real marathons slow as fuel depletes; experienced racers add 2–4% to projections beyond half-marathon distance as a fade allowance.
A half marathon in 1:52:30 means 5:20/km pace (8:35/mile), projecting to roughly 3:45:15 for a full marathon at the same effort.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
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