How steps translate to kilometres
One kilometre = 100,000 cm. Your stride length in centimetres determines how many strides — and therefore double-steps — fit in that distance. For a 175 cm adult walking at a normal pace, stride length is about 72 cm, so 10,000 steps covers roughly 7.2 km. At a brisk walk the stride lengthens to about 79 cm, giving nearer 7.9 km for the same 10,000 steps.
Calorie burn correlates loosely with steps: a commonly cited approximation is roughly 0.04 kcal per step for a typical adult, or about 400 kcal per 10,000 steps. This is highly individual — body weight, fitness level, terrain, and carrying load all affect actual expenditure. The estimate here is a rough guide only.