Healthy Weight Calculator

Find your healthy weight range for your height based on a BMI of 18.5–25. Free, instant, no signup.

How to use the Healthy Weight Calculator

  1. Enter your values. Fill in the fields with your numbers.
  2. Calculate. Press Calculate to run the healthy weight calculator.
  3. Use the result. Copy the result or try a related tool next.

Why use our Healthy Weight Calculator

Instant results. Enter your figures and the healthy weight calculator returns an answer in seconds.
Free & private. Runs in your browser — no signup, and nothing is sent to a server.
Accurate. Uses standard formulas so you can rely on the numbers.

Free to use — premium coming soon

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About the Healthy Weight Calculator

The Healthy Weight Calculator tells you the range of body weights that are considered healthy for your height, rather than spitting out a single number. Enter your height in centimetres, metres, feet and inches, and the tool returns a low-to-high weight band you can aim to stay within. It does this by working the standard Body Mass Index (BMI) equation backwards: instead of dividing your weight by your height to find a BMI, it solves for the weights that land inside the healthy BMI zone. The output is a practical target window, which is far more realistic than chasing one exact 'ideal' figure.

Reach for this calculator when you want a concrete goal weight for a height you already know, when you are setting a target before a diet or fitness plan, or when a doctor's chart left you unsure where the cut-offs actually fall. It is also useful for sanity-checking a goal: if the weight you have in mind sits well below the healthy band, that is worth knowing before you start. Parents, coaches and anyone tracking progress over months tend to prefer a range because daily weight naturally fluctuates by a kilogram or two with hydration, meals and time of day.

Mechanically, the tool uses the World Health Organization healthy BMI range of 18.5 to 24.9, which the NHS and the US CDC both endorse as the standard for adults. It squares your height in metres, then multiplies that figure by 18.5 for the lower bound and by 24.9 for the upper bound. For example, at 1.70 m the maths is 1.70 x 1.70 = 2.89 m squared, giving roughly 53.5 kg to 71.9 kg. If you enter imperial units the calculator converts them first, so feet, inches and pounds give the same answer as metric.

Treat the result as a screening guide, not a medical verdict. BMI-based ranges do not distinguish muscle from fat, so very muscular people, athletes, pregnant women, older adults and children can fall outside the band while still being healthy. The calculator runs entirely in your browser, so your height and weight are never uploaded, stored or shared; nothing leaves your device. For a personalised assessment that factors in body composition, waist measurement and medical history, use this number as a starting point for a conversation with a healthcare professional.

Frequently asked questions

What counts as a healthy weight for my height?

A healthy weight is any weight that puts your BMI between 18.5 and 24.9, the range recognised by the WHO, NHS and CDC. The calculator converts that BMI band into kilograms or pounds for your specific height, so you see an actual low-to-high weight window rather than a single figure.

How does the calculator work out the range?

It reverses the BMI formula. It squares your height in metres, then multiplies by 18.5 to find the lower healthy weight and by 24.9 to find the upper healthy weight. For instance, someone 1.75 m tall gets a range of about 56.7 kg to 76.3 kg.

Does it account for age, sex or muscle mass?

No. The standard adult BMI range used here is the same for men and women and does not separate muscle from fat. Highly muscular people, athletes and older adults may sit outside the band yet still be healthy, so use the result as a guide alongside other measures like waist size.

Is this the same as an ideal weight calculator?

Not quite. An ideal weight calculator usually returns one target number from formulas such as Devine or Robinson, while a healthy weight calculator gives a range. A range is generally more realistic because healthy weight is a band, not a precise point, and daily weight naturally fluctuates.

Can I use it for children or during pregnancy?

No. The 18.5 to 24.9 range applies only to non-pregnant adults aged 20 and over. Children and teens are assessed with age-and-sex percentile charts, and pregnancy weight gain follows separate guidance, so this calculator is not appropriate for those groups.

From our blog

Steps to Miles: How to Convert Your Step Count Into Real Distance

By the Super Simple Digital Tools Team · Updated June 2026

Step counters are everywhere, but a step is a strange unit of distance. Two people can take the same 10,000 steps and end up nearly half a mile apart, simply because one has longer legs or walks faster. The bridge between steps and miles is stride length, the distance covered by a single step. Once you know yours, converting any step total to miles is just arithmetic: multiply steps by stride length and divide by 5,280, the number of feet in a mile. Everything else in this guide is about getting that stride number right.

The quickest way to a stride estimate is height, because the two are strongly correlated. Walking stride averages about 41.3 to 41.5 percent of your height, while running stride climbs to roughly 52 percent as your gait opens up. A 5-foot-6 adult, for instance, has a walking stride near 27 inches, which works out to about 2,300 steps per mile. These percentages come from gait research and are reliable enough for everyday tracking, but they are population averages. Your real stride can sit well above or below the curve depending on leg proportions and habits.

For a number you can genuinely trust, measure your stride directly. Pick a flat hallway, sidewalk, or track, mark a starting line, and walk 10 normal, relaxed steps. Measure from your start mark to where your trailing foot lands, then divide that distance by 10. Repeat it two or three times and average the results to smooth out any wobble. Do the same at a jog if you want a separate running stride. This two-minute exercise removes the biggest source of error in any steps-to-miles conversion.

Pace deserves attention because it quietly changes the answer. As you move from a stroll to a brisk walk to a run, each step gets longer, so a fixed step count translates to more miles. Reference data shows 10,000 steps equating to roughly 4.4 miles at a 3 mph walk, about 5.2 miles at a 4 mph brisk pace, and around 6 miles at a 6 mph run. If your day mixes slow and fast walking, a single average stride will be close enough, but knowing the spread helps you interpret big-mileage days more sensibly.

Finally, treat the mileage as a guide rather than a survey-grade measurement. A height-based estimate can drift 10 percent or more for outliers, and even a measured stride varies with fatigue, terrain, and footwear. The goal is consistency: pick a stride method, stick with it, and use the resulting miles to track trends and hit goals like a daily target or a weekly distance. Combined with a calorie or pace tool, a dependable steps-to-miles figure turns a vague step count into a metric you can actually plan around.

  • Measure your stride over 10 steps and divide by 10 instead of trusting a height estimate; it is the single biggest accuracy boost.
  • Keep a separate stride length for running, since it is about 25 percent longer than your walking stride.
  • If your tracker's distance looks off, recheck it here with a measured stride before assuming the device is broken.
  • For mixed-pace days, use your everyday walking stride; it will be close enough without needing a separate calculation for each segment.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

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