Endurometry
Even split n is n × (goal time ÷ distance in units). A 4:00 marathon is 5:41/km; kilometre 42 reads 3:58:53 and the last row is 42.195 km at 4:00:00. A half marathon’s last row is 21.0975 km, never 42.195.
Last updated October 5, 2026
A split table answers “what should the clock say at this marker?” If you hold even pace, every whole kilometre (or mile) is the same duration, and an official road distance that is not a round number gets one leftover finish row.
The formula
Units = race distance ÷ 1 km (or ÷ 1.609344 km for miles). Pace per unit = goal time ÷ units. Cumulative split n = n × that pace. If more than 5 m remain after the last whole unit, add a finish row labelled with the true distance and the goal time. The pace calculator uses the same split engine.
Marathon 4:00:00 by kilometre
42.195 km in 4:00:00 is 5:41/km. There are 42 whole kilometres plus a 195 m leftover:
- km 1 cumulative 0:05:41
- km 10 cumulative 0:56:53
- km 42 cumulative 3:58:53
- finish row 42.195 km / 4:00:00
That is 43 rows, not 42. Dropping the leftover is how people think a marathon is 42.000 km.
Half marathon leftover is not 42.195 km
21.0975 km even by km has 21 whole kilometres plus 97.5 m. The last label must be 21.0975 km. A generator that hard-codes “42.195 km” on every leftover row is wrong. Mile splits on a half finish near 13.11 mi.
Chart, cards, or wristband
The pace chart generator prints min/km and min/mile together plus a speed grid. The simple pace band generator is a card grid (even only). The printable wristband wraps 40 mm stock; negative/positive ±5% ramps are an Endurometry layout, not a published elite model.
What even splits cannot see
Hills, wind, GPS extra distance and a planned negative split. If your watch is already 15 seconds ahead at 5 km, you are either fast or the course/GPS is long — believe the kilometre markers. Methodology and rounding: pace.
Related Tools
Running Pace Calculator
Enter distance and finish time to get your pace per km and mile, average speed and per-kilometre splits.
Pace Chart Generator
Enter a goal finish time and get a pace chart in both min/km and min/mile, a speed-to-pace conversion table, your tempo pace and a printable wristband.
Printable Pace Wristband
Generate a single-column pace wristband sized to your wrist — no cutting, just wrap it once. Pick even / negative / positive split and 1/2/5/10 km (or mi) intervals, then print at 100%.
Related guides
What Is Running Pace?
Pace is time per kilometre or mile. How to calculate it, how it differs from speed, and how to convert min/km and min/mile with 1.609344.
Marathon Pace Strategy
How to pick a realistic marathon goal pace from a recent race, why even splits beat fast starts, and how to hold pace without watching your watch all day.
Negative vs positive split
Even, negative and positive splits on the same 4:00 marathon. What ±5% on Endurometry’s wristband actually prints, why a fast first 10 km usually costs more than it banks, and why leftover kilometres can miss 4:00:00 by half a minute.
How the numbers are calculated
Pace, speed and distance · Rounding and displayed precision · Sources
Frequently Asked Questions
Why is kilometre 42 not 4:00:00?
Because a marathon is 42.195 km. 42 × 5:41 is 3:58:53; the last 195 m takes the remaining 67 seconds.
Can I use miles?
Yes. Divide by 1.609344 km per mile. A marathon has 26 whole miles plus about 0.2 mi.
Is a negative split the same table?
No. Even arithmetic is this page. A ±5% ramp lives on the printable wristband, and it is our layout, not a journal model.
My GPS splits do not match.
GPS traces run long. Hit the certified markers and the printed cumulative time.
Want a new tool or fix?
Tell us which calculator, pace chart or fix would help — we build what runners ask for. Replies usually come back in 1–2 days.