Speed, Time & Distance,
Synchronized on the Track.
Free running calculators: pace from a race time, mile splits for any distance, race equivalent predictions, and negative-split planning.
Instant Unit Toggle
Effortless conversion between imperial minutes-per-mile and metric minutes-per-kilometer.
Treadmill MPH / KPH
Translate outdoor road pace directly into gym treadmill speed settings without mental math.
Even-Split Mile Markers
Every kilometer and mile elapsed split time generated for race-day wristbands.
PaceCalc Calculators
Race Pace Calculator
The exact pace a goal time requires — per mile and kilometer, with a splits table for the full race.
Race Equivalency Calculator
What a recent race predicts for other distances — the Riegel model runners and coaches actually use.
Negative Split Planner
The fade-free race plan: first-half and second-half paces that land your goal — with the banking math exposed.
Treadmill Pace Converter
Treadmill MPH ↔ min/mile ↔ min/km — with the incline adjustment for indoor-vs-outdoor honesty.
Evidence-Based Physiology
How to write a race plan the watch can enforce
Cumulative splits, effort checkpoints, and the three decisions to make before the starting line.
Treadmill training that actually transfers to race day
Which workouts belong on the belt, which belong outside, and how to bridge the two.
12 mistakes people make with running pace
The recurring errors we see in running pace — what causes each one, and the habit that prevents it.