Estimate your walking and running step and stride length from your height, and convert any step count into a distance in kilometres or miles.
Your step length — the distance from one footfall to the next — can be estimated from your height using a fixed ratio: roughly 41.3–41.5% of height for walking and 44.8–45% of height for running, depending on sex. Your stride length, a full left-right gait cycle, is simply double your step length. A 170 cm-tall male walker, for example, has an estimated step length of about 70.55 cm and a stride length of about 141.1 cm — enough to cover roughly 7.06 km in 10,000 steps.
| Metric | Value |
|---|
This calculator uses a set of height-based coefficients cited from ACSM (American College of Sports Medicine) guidance and widely used by pedometer and wearable-device manufacturers for an initial, out-of-the-box distance calibration before a device has collected any of your actual walking or running data. Because leg length is roughly proportional to overall height across a population, multiplying height by a fixed ratio gives a reasonable average step length without needing to measure anything directly.
Using a 170 cm male walker's estimated step length of 70.55 cm, here's how common step-count targets translate into distance:
| Steps | Distance (km) | Distance (miles) |
|---|---|---|
| 5,000 | 3.53 km | 2.19 miles |
| 7,500 | 5.29 km | 3.29 miles |
| 10,000 | 7.06 km | 4.38 miles |
| 15,000 | 10.58 km | 6.58 miles |
Holding height constant at 170 cm, here's how the estimated step and stride length change between sex and activity:
| Profile | Coefficient | Step Length | Stride Length |
|---|---|---|---|
| Male, walking | × 0.415 | 70.55 cm | 141.10 cm |
| Female, walking | × 0.413 | 70.21 cm | 140.42 cm |
| Average/unspecified, walking | × 0.414 | 70.38 cm | 140.76 cm |
| Male, running | × 0.45 | 76.50 cm | 153.00 cm |
| Female, running | × 0.448 | 76.16 cm | 152.32 cm |
| Average/unspecified, running | × 0.449* | 76.33 cm | 152.66 cm |
*ACSM cites separate male and female running coefficients only; the "average/unspecified" running figure used by this calculator is the midpoint of the two (0.449), not an independently published value.
These two words get used interchangeably online, but they describe different distances, and mixing them up will throw off any distance calculation by a factor of two. A step is a single footfall — the distance between where your left foot lands and where your right foot lands next (or vice versa). A stride is a complete gait cycle — from when one foot lands to the next time that same foot lands — which covers two steps, one from each leg.
Pedometers and phone step counters report step counts, and the "steps" figure they show you already means individual footfalls, not full gait cycles. When you see a step-length coefficient like 0.415, it's built to estimate a single step, so multiplying by your total step count directly gives you total distance — no need to divide by two.
The ratios used in this calculator — roughly 41.3–41.5% of height for walking and 44.8–45% of height for running — are height-based step-length coefficients cited from ACSM (American College of Sports Medicine) guidance. They're a standard, publicly documented method that pedometer and wearable manufacturers have long used to give a device a sensible default distance estimate before it has any GPS data or personal calibration to work from.
Basic pedometers and many budget or older fitness trackers don't use GPS — they count footfalls with an accelerometer and then multiply by a stored step-length value to estimate distance. If that stored value is a generic default rather than your own step length, the device's distance and pace readouts can drift noticeably from reality, especially for people who are shorter or taller than an "average" assumed height. Working out your estimated (or, better, directly measured) step length and entering it into your device's settings, where that option exists, is a quick way to make its distance figures more trustworthy without needing GPS at all.
What's the difference between step length and stride length?
A step is the distance covered by a single footfall — from where one foot lands to where the other foot lands next (left to right, or right to left). A stride is a full gait cycle: from one foot's landing to the next landing of that same foot, which includes two steps. In practice, stride length is almost exactly double step length, which is why this calculator shows both figures — pedometers and some fitness trackers count individual steps, but the coefficients used to estimate step length are built around a single footfall, not a full stride.
How many steps are in a kilometre or a mile?
It depends entirely on your own step length, so there's no single universal answer. For a 170 cm adult with an average walking step length of about 70.55 cm, one kilometre takes roughly 1,417 steps (100,000 cm ÷ 70.55 cm) and one mile takes roughly 2,281 steps. Taller people need fewer steps to cover the same distance; shorter people need more. Enter your own height above to get your personal steps-per-km and steps-per-mile figures.
Does my stride length change when I run versus walk?
Yes, significantly. Running strides are longer relative to height than walking strides because running includes a brief airborne "flight phase" between footfalls, while walking always keeps at least one foot in contact with the ground. That's why this calculator uses separate coefficients for walking (about 0.413–0.415 × height) and running (about 0.448–0.45 × height) — running step length is typically 8–9% longer than walking step length for the same person, and the gap widens further at faster running speeds.
How accurate is a height-based step length estimate?
It's a solid starting point, not a precise measurement. The ACSM-cited coefficients used here are population averages, so an individual's actual step length can vary by several centimetres depending on walking speed, leg length relative to total height, terrain, age and fitness level. For everyday use — like giving a pedometer or non-GPS fitness tracker an initial calibration figure — a height-based estimate is accurate enough. If you need more precision, measure your own step length directly (see below) or calibrate against a GPS-tracked walk or run.
Why are the coefficients different for men and women at the same height?
The ACSM-cited coefficients reflect average differences in leg length proportion and gait between men and women of the same overall height — on average, women's legs make up a slightly smaller proportion of total height than men's, which produces a marginally shorter step length ratio (0.413 versus 0.415 for walking). The gap is small, about half a percent, so if you're unsure which to use, the "average / unspecified" option (0.414 for walking) will be within a centimetre or two either way for most people.
How do I measure my actual step length instead of estimating it?
Walk a known distance — 10 measured metres works well — at your normal pace, counting the number of steps (footfalls) it takes to cover it. Divide the distance by your step count to get your actual step length. Doing this separately for a walking pace and a running pace gives you calibration figures that are more personally accurate than any height-based formula, including this one, because it reflects your actual gait rather than a population average.
Why does step length matter for fitness trackers and pedometers?
Simple pedometers and some non-GPS fitness trackers count footfalls with an accelerometer, then multiply by an assumed step length to estimate distance — many devices ship with a generic default rather than your actual measurements. If that default doesn't match your real step length, every distance and pace figure the device reports will be off by roughly the same proportion. Entering your own height-based or measured step length into a device's settings, where that option exists, makes its distance estimates more accurate.