Calculate pace, finish time, distance, race splits and cumulative segment progression with exact millisecond split totals.
01 / PURPOSE-SPECIFIC INPUTS
02 / RESULT & INTERACTIVE INSPECTION
Training and race estimates depend on conditions and individual capability. No runner percentile, medical exercise limit or guaranteed race performance is inferred.
Segment 1: 5 km in 25:00; ending at 5 km; 300 seconds per km. Dashed reference: 300 seconds per km.
| Segment | Length km | Segment time | Pace / km | Cumulative km | Cumulative time |
|---|---|---|---|---|---|
| 1 | 5 | 25:00 | 5:00 | 5 | 25:00 |
Enter your values locally; no inputs are uploaded.
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Review the explanation, copy supported outputs or reset the workspace.
Choose pace, time, distance or a split/prediction mode. Enter distances, units and elapsed times. Inspect segment pace bars and cumulative progression. Read the worked explanation and scope alongside every result.
Calculate pace, finish time, distance, race splits and cumulative segment progression with exact millisecond split totals. Interactive controls inspect the calculated model without silently changing submitted assumptions.
Pace Calculator inputs and calculations remain in browser memory. No external processing API receives entered dates, measurements, coefficients or financial values. Ordinary website page requests may still be logged. Clipboard access occurs only when you choose Copy Result.
Pace is elapsed seconds divided by kilometers; speed in km/h is 3600 divided by seconds per kilometer. An international mile is exactly 1.609344 kilometers.
A bare number means minutes. Colon formats are m:ss or h:mm:ss, with up to three decimal places for seconds. Durations must be positive and no longer than seven days.
Yes. The model allocates by distance and optional linear pace weights, then uses largest-remainder millisecond allocation so the full split schedule sums to exactly the entered total.
The illustrative plan decreases pace multipliers across segment midpoints, normalizes the weighted durations to the entered total and retains the final partial segment. It is planning arithmetic, not a personalized training prescription.
Yes. Both distance and elapsed time must strictly increase. Each segment subtracts the preceding cumulative observation, so bars show actual segment pace rather than cumulative average pace.
Choose constant-pace extrapolation or the Riegel power model T2 = T1 times (D2/D1)^k. The editable default k = 1.06 is an illustrative assumption and does not guarantee performance.