Work out exactly what pace you need to hold, per mile, to cross a marathon finish line in your target time.
How it works
Required pace is your target time divided by the marathon’s official distance: Pace = Target Time ÷ 26.2188 miles. A four-hour marathon requires an average pace of about 9:09 per mile.
What this does not include
This gives a flat average pace — it doesn’t account for pacing strategy (negative splits, fueling stops, elevation changes) that real race plans build around.
How to use this calculator
- Enter your target finish time in hours and minutes.
- Read off the required pace per mile.
A worked example
Target time 4:00:00 → 240 minutes ÷ 26.2188 miles = 9.1537 min/mile (about 9:09 per mile).
Target time 3:00:00 → 180 minutes ÷ 26.2188 miles = 6.8653 min/mile (about 6:52 per mile) — a substantially faster required pace for the hour saved.
What the variables mean
| Variable | Meaning |
|---|---|
| Target time | Desired finish time, hours and minutes |
| 26.2188 miles | The official marathon distance (42.195 km), fixed by World Athletics since 1921 |
Edge cases worth knowing
This is a flat average pace, not a pacing strategy. It doesn’t account for negative splits, fueling stops, or elevation changes — the building blocks of a real race plan built around this baseline number.
Shaving an hour off a marathon target demands a disproportionately faster pace — going from a 4-hour to a 3-hour goal only cuts the time by 25%, but the required pace tightens by more than 2 minutes per mile, a much larger relative jump in effort.
Why 26.2188 miles and not exactly 26.2?
The official marathon distance, fixed by World Athletics since 1921, is 42.195 kilometers, which converts to 26.2188 miles — “26.2” is simply the commonly rounded figure.
What pace is needed for a sub-4-hour marathon?
Roughly 9:09 per mile, though most runners build in a small buffer since maintaining an exact even pace for 26.2 miles is difficult in practice.
Does this account for hills or weather?
No — this is a flat average pace calculation and doesn’t adjust for course elevation, heat, or wind, all of which affect achievable pace on race day.
