Steps to distance in km and miles from a step length based on your height or measured, with walking time and calories from the ACSM equation.
10,000 steps of 72.6 cm cover 7.26 km (4.51 mi). At 5 km/h that is 1 h 27 min 9 s of walking and about 361 kcal.
5 kcal per litre of oxygen. Includes resting energy for the walking time.
Distance is the number of steps times step length. Step length comes from height, 0.415 × height for men and 0.413 × height for women, or from your own measurement. Walking time follows from the speed, and calories use the American College of Sports Medicine walking equation: oxygen cost = 0.1 × speed in m/min + 3.5 mL/kg/min, at 5 kcal per litre of oxygen.
People use it to turn a pedometer or phone step count into kilometres or miles. For a man 175 cm tall a step is about 72.6 cm, so 10,000 steps cover 7.26 km (4.51 mi); at 5 km/h that is 1 h 27 min of walking and about 361 kcal for a 70 kg walker.
The height rule describes average walking steps; running, hills and short steps differ, and counting 20 steps over a measured distance gives your own length. The ACSM equation is meant for 50–100 m/min (3–6 km/h), and its calories include resting energy.
Checked against: Python 3.8 decimal: 0.415 × 175 = 72.625 cm; 7262.5 m ÷ 83.333 m/min = 87.15 min; (0.1·83.333 + 3.5)·70·87.15/1000·5
Checked against: Python 3.8 decimal: 0.413 × 162.56 cm = 67.13728 cm; × 8000 = 5.3709824 km; ACSM equation at 83.333 m/min
Checked against: Python 3.8 decimal: 5000 × 0.762 m = 3810 m = 2.367424 mi; 80.4672 m/min for 47.348 min; ACSM equation × 68.0389 kg
Checked against: Python 3.8 decimal: 0.75 m; 0.009 min × 11.8333 mL/kg/min × 70 kg × 5 kcal/L = 0.037275 kcal
About 1,380 steps per km, or 2,220 per mile, for a 72.6 cm step, the height-rule estimate for a man 175 cm tall. Shorter people take more: a woman 162.6 cm (5 ft 4 in) tall has a 67.1 cm step, about 1,490 steps per km or 2,400 per mile. For your own figure, divide 1,000 m or 1,609 m by your step length in metres.
It depends on step length. With a 72.6 cm step, the height-rule estimate for a man 175 cm tall, 10,000 steps is 7.26 km or 4.51 miles. With a 67.1 cm step, for a woman 162.6 cm tall, it is 6.71 km or 4.17 miles. At a walking speed of 5 km/h, 7.26 km takes about 1 hour 27 minutes.
Fewer can be enough. A 2022 Lancet Public Health meta-analysis of 15 cohorts with 47,471 adults (Paluch and colleagues) found that the risk of death fell as daily steps rose, levelling off at 6,000–8,000 steps a day for adults aged 60 and over and 8,000–10,000 for younger adults. The authors noted that the popular 10,000-step target has little evidence behind it.
About 361 kcal for a 70 kg person walking the 7.26 km at 5 km/h, by the ACSM walking equation, including the resting energy used during the 87 minutes. Calories scale with body weight, so a 90 kg walker covering the same distance at the same speed uses about 464 kcal. Step length matters too, because it sets how far 10,000 steps go.
Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 4 worked examples whose answers come from independent sources; for example, “10,000 steps, man 175 cm, 70 kg, 5 km/h” is checked against Python 3.8 decimal: 0.415 × 175 = 72.625 cm; 7262.5 m ÷ 83.333 m/min = 87.15 min; (0.1·83.333 + 3.5)·70·87.15/1000·5.
Klein I. Pedestrian inertial navigation: an overview of model and data-driven approaches. arXiv:2407.21676 (2024), eq. 6 — step length 0.415 × height (men), 0.413 × height (women); American College of Sports Medicine. ACSM's Guidelines for Exercise Testing and Prescription — metabolic equation for walking (50–100 m/min); Texas Tech University — ACSM metabolic calculations study notes.
4 worked examples with independently sourced answers ship with this calculator. They run in the test suite; you can run them here too.
Calories burned by an activity from its MET value in the Compendium of Physical Activities, your body weight and the time spent.
Running pace per km or mile from distance and time, or finish time or distance from pace, with even splits and Riegel race predictions.
Body mass index (BMI) from height and weight in metric or imperial units, with the WHO adult category and the healthy weight range for your height.
Basal metabolic rate (BMR) by Mifflin-St Jeor, Harris-Benedict or Katch-McArdle, and daily calorie needs (TDEE) for five activity levels.
Heart rate zones from your maximum heart rate (220 − age, Tanaka, Gulati for women, or measured) by the Karvonen or percent-of-max method, with a target heart rate.
VO2 max from the Cooper 12-minute run, the Rockport 1-mile walk or the resting heart-rate ratio, rated against Cooper Institute norms for age and sex.
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