StepMax / Guides / Measure step length
AccuracyHow to measure your step length — and why your distance stats depend on it
Your step counter is probably right about your steps and wrong about your kilometres. The culprit is a single number most people never set: step length.
Step length vs stride length (they're different)
Step length is heel-strike to heel-strike of opposite feet — one step. Stride length is two steps (same foot to same foot), so it's roughly double. Pedometer apps use step length. Mixing the two is the most common reason people enter a value and get distances that are exactly 2× off.
Method 1: the 10-step test (5 minutes, free)
- Mark a start line on flat ground.
- Walk 10 normal steps at your everyday pace — don't perform for the tape measure.
- Measure from the start line to the toe of your final foot.
- Divide by 10. That's your step length. Repeat twice and average for a better estimate.
Method 2: height estimate (30 seconds, rough)
Step length ≈ height × 0.41–0.43. A 175 cm person lands around 0.72–0.75 m. This is what most apps silently assume — fine for ballparks, but it can miss your real stride by 5–10%, and every distance and calorie figure inherits that error.
Method 3: GPS calibration in StepMax (most accurate)
- Open StepMax and find the step length measurement tool in settings.
- Go outdoors with clear sky and walk a short, steady stretch as prompted.
- StepMax divides GPS-measured distance by counted steps — your true average step length at your real, everyday pace, including all your personal gait quirks no formula can capture.
This is the only method that measures you walking the way you actually walk, and it's a one-time job: daily step counting in StepMax never uses GPS afterwards, so battery stays untouched.
What changes once it's set
- Distance in km or miles matches reality — your 5 km loop reads 5 km.
- Calories burned improve, since they're computed from distance plus your body stats.
- Pace in the Walk Timer becomes trustworthy enough to train against.
Measure once. Trust every number after.
StepMax's GPS step-length calibration takes five minutes and fixes your distance and calorie stats for good. Free on iPhone and Android.
Download StepMax free ▶ Google PlayKeep reading
- How accurate is phone step counting, really?
- A pedometer that doesn't drain your battery: how it's possible
- How many steps a day to lose weight?
StepMax is a free step counter for iPhone and Android by Cinderhound Studio. Some social features require an optional Sign in with Apple.