Calibration
Your step length, your sensor, and the formulas behind every derived number.
Opening your local journal…
Why calibrate
Step length varies a lot between people and with pace and terrain. A default of 0.70 m can be off by 20% or more for you. One measured walk makes the planner and distance estimates personal; several measurements in different conditions show how much your step really varies.
Derived numbers stay derived
Distance and energy are never stored as if they were measurements. They are recomputed from your steps and the current settings, labelled as estimates, and shown with the inputs that produced them.
Questions
How do I measure my step length?
Walk a known distance, such as one 400 m track lap, at your usual pace and count every step. Divide the distance by the steps. StepTracker does the division and keeps each measurement with its context.
Does changing my step length rewrite old distances?
No distances are stored; they are calculated when shown. A new calibration changes the estimates you see, and deleting it brings back the earlier ones. Distances that came from GPS in an imported file are never replaced.
How is the energy estimate calculated?
Net kcal ≈ 0.5 × body mass in kg × distance in km. It is a common rough approximation for walking on level ground. It is off by default, shown with a wide range, and not medical or dietary advice.