🌐

Custom Distance Pace Calculator & Race Card

Any race distance: enter the course length in km, then a goal time or pace, to get even splits and a shareable race card.

Target pace

Pace rounds down, treadmill speed rounds up — both err slightly fast, so the target is still met. Times use the exact pace.

Speedkm/h

Finish time

: :

Distancekm

Marathon

Half marathon

10K

Column interval

Custom

Display

Columns

Target position

Rows

Plan 42.195 km even splits and export a race card. Example: 3:30:00 = approximately 4:58.6/km.

Pace in the main calculator input is shown rounded down to whole seconds; finish times use the precise value. Treadmill speed is rounded up to the next 0.1 km/h (or mph). For example, 4:15/km converts to about 14.118 km/h, so the treadmill setting is 14.2 km/h, which gives about 4:13.5/km. On the TrainingPeaks page, Target pace means the workout target including your chosen adjustment, displayed to 0.1 second. It is not the actual pace produced by the rounded treadmill speed. Times and total distance are estimated from target pace.