Fitness Tracker Accuracy Calculator
Estimate step-counting and heart-rate measurement accuracy based on sensor quality, wear fit, activity type, and skin tone.
Inputs
Results
Step accuracy (%)
96.82
Heart rate accuracy (%)
94
Step MAPE (%)3.18
Estimated step error318
HR MAPE (%)6
HR error (bpm)4.3
Overall accuracy score95.13
Steps Reported10,159
Steps Reported Mid9,841
Hr Reported Estimate74.2
How to Use This Calculator
- Set the accelerometer/PPG sampling rate (Hz) matching your wearable's specification.
- Select your activity type (walking, running, cycling, elliptical, or weight training).
- Rate wrist fit tightness (1–10) and your Fitzpatrick skin type — both affect optical sensor accuracy.
- Choose the number of sensor LEDs and enter your reference step count and actual heart rate.
- Review estimated step accuracy (%), HR accuracy (%), and error values to benchmark your device.
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