Free healthy weight calculator
Find your healthy weight range in two seconds. Enter your height and the calculator returns the weight span that keeps your BMI in the healthy 18.5–24.9 band — a lower and upper limit in kg and lb, with a healthy-weight-by-height chart, updated live, as you type.
On this page15 sections
Ideal weight formulas are population averages. Athletes and muscular individuals may have a healthy weight above the calculated range.
Results are estimates. Consult a professional.
What is a healthy weight?
A healthy weight is not a single number — it is a range. For any given height there is a span of weights, usually several kilograms wide, that all count as healthy. This healthy weight calculator returns that span the moment you enter your height: a lower limit and an upper limit, with everything in between considered a healthy weight for you.
The range comes from the WHO healthy BMI band of 18.5 to 24.9. Rather than asking what your BMI is, the calculator works the BMI formula backwards: it finds the lightest weight that keeps your BMI at 18.5 and the heaviest weight that keeps it at 24.9. Any weight between those two limits puts your BMI in the healthy band. That is the key idea this page returns to throughout — a healthy weight is a band, not a target.
How the healthy weight range is calculated
BMI is weight divided by height in metres squared. Hold the BMI at each end of the healthy band and solve for weight, and you get the two limits of your healthy range. Only your height is needed — the band itself supplies the rest.
Notice that the range is built from height alone. That is what makes it different from an ideal-weight formula, which adds sex and returns one figure. Here, two people of the same height get the same healthy range whatever their sex — because the BMI band that defines "healthy" is identical for everyone.
A worked example using the healthy weight calculator
Sam is 1.75 m tall and wants to know the weight range that keeps them healthy. Here is exactly how the calculator works out the two limits from the BMI band.
- Square the height in metres. 1.75 × 1.75 = 3.0625. This is the figure both limits are built on.
- Multiply by 18.5 for the lower limit. 18.5 × 3.0625 = 56.7 kg — the lightest weight that keeps BMI in the healthy band.
- Multiply by 24.9 for the upper limit. 24.9 × 3.0625 = 76.3 kg — the heaviest weight that keeps BMI in the healthy band.
The width is the lesson. A 20 kg span means weight alone can't tell you much within the band — someone at 58 kg and someone at 74 kg are both "a healthy weight" at this height. Where you sit inside the range, and what that weight is made of, matter more than the single number. The next sections show the full chart by height and how to read your place in the band.
Healthy weight range by height
Most people want to see the whole chart, not just their own number. The table below applies the 18.5–24.9 band across common heights, in both kilograms and pounds. Find the height nearest yours and read across to your healthy range.
| Height | Healthy weight (kg) | Healthy weight (lb) |
|---|---|---|
| 4'10" (147 cm) | 40 – 54 kg | 88 – 119 lb |
| 5'0" (152 cm) | 43 – 58 kg | 94 – 127 lb |
| 5'2" (157 cm) | 46 – 61 kg | 101 – 135 lb |
| 5'4" (163 cm) | 49 – 66 kg | 108 – 146 lb |
| 5'6" (168 cm) | 52 – 70 kg | 115 – 155 lb |
| 5'8" (173 cm) | 55 – 75 kg | 122 – 164 lb |
| 5'10" (178 cm) | 59 – 79 kg | 129 – 174 lb |
| 6'0" (183 cm) | 62 – 83 kg | 137 – 184 lb |
| 6'2" (188 cm) | 65 – 88 kg | 144 – 194 lb |
| 6'4" (193 cm) | 69 – 93 kg | 152 – 204 lb |
Each range is the weight span that keeps BMI between 18.5 and 24.9 at that height, rounded to the nearest unit. The ranges are the same for men and women and apply to adults aged 20 and over.
Two patterns stand out. First, the range shifts up with height — a healthy weight at 6 ft would be overweight at 5 ft 2 in. Second, the range widens with height: it is about 15 kg wide at 5 ft and nearly 24 kg wide at 6 ft 4 in, because the band scales with height squared. Taller people simply have more room inside "healthy."
Why a healthy weight is a range, not a single number
It is tempting to want one number — the weight you "should" be. But the science doesn't support a single point. The healthy BMI band spans 18.5 to 24.9 because the data show that weight-related health risk stays low across that whole span, not just at one spot in it. A person at the bottom of their range and a person at the top are both at low statistical risk.
- Bodies differ at the same height. Bone structure, muscle, and natural build vary from person to person, so the healthy weight for one 5 ft 8 in adult sits higher in the band than for another.
- Weight fluctuates normally. Day-to-day shifts from food, fluid, and water retention can move the scale a kilogram or two — a single "target" weight would be hit and missed constantly, while a range absorbs the noise.
- A band is a healthier goal. Aiming to stay inside a range is realistic and sustainable; chasing one exact number invites over-restriction and frustration when the scale won't sit still.
Where in the range should you aim?
Once you know your range spans, say, 56 kg to 76 kg, the natural next question is where to sit within it. The honest answer is that anywhere inside the band is healthy by BMI — there is no medically "best" point. But a few factors can help you read your own range.
- Build and frame. A naturally broad-shouldered, large-framed person will tend to settle higher in the band; a smaller-framed person, lower. Neither is wrong.
- Muscle. If you train and carry visible muscle, you'll sit higher in the range — or even just above it — at a low body-fat level, because muscle is dense. That is healthy, not a problem.
- How you feel and function. Energy, strength, sleep, and how your clothes fit are better day-to-day guides than aiming for a specific spot on the scale.
- The edges deserve a second look. Sitting right at the bottom (BMI near 18.5) or right at the top (near 24.9) is still healthy, but it is closer to the underweight or overweight line — worth keeping an eye on if your weight is trending toward an edge.
To see exactly which BMI a given weight produces within your range, use the BMI calculator; to gauge how much of your weight is muscle versus fat — the thing the scale can't see — use the body fat percentage calculator.
Healthy weight range vs. ideal weight
People often reach for "ideal weight" and "healthy weight" as if they were the same thing. They answer related but different questions. An ideal weight is a single number a formula produces from your height and sex; a healthy weight is the whole band that any BMI between 18.5 and 24.9 allows. The ideal-weight figure almost always falls somewhere inside the healthy range — so the cleanest way to picture them together is one point sitting inside a band.
| Healthy weight range | Ideal weight | |
|---|---|---|
| What it gives you | A band (min to max) | A single number |
| Inputs used | Height only | Height and sex |
| Based on | WHO BMI band 18.5–24.9 | A formula (e.g. Robinson) |
| Best read as | The whole healthy span | One reference point in that span |
The ideal-weight number normally sits inside the healthy range; treat it as a reference point, not a boundary of the band.
Use them together: the range tells you the span you can be healthy across, and an ideal-weight figure gives you a single reference point within it if you prefer one number to anchor to. For that single figure, see the ideal weight calculator, which uses the Robinson formula and compares the four classic equations.
How to reach a healthy weight
If your weight sits outside your healthy range, the encouraging news is that you don't have to land in the dead centre of the band to benefit. Research consistently shows a 5–10% change in body weight improves blood pressure, blood sugar, and cholesterol — well before you reach a textbook BMI. Getting just inside the edge of your range delivers most of the gain.
- Find your range, then your nearest edge. You don't have to aim for the middle — the closest limit of your healthy band is a realistic first target.
- Move through energy balance. A modest, sustainable calorie deficit loses weight; a modest surplus gains it. About 0.5–1 kg (1–2 lb) per week is a safe, evidence-based pace.
- Protect muscle while you change. Enough protein and regular resistance activity keep the weight you lose coming from fat, not muscle — which keeps you higher and healthier within the band.
- Track the trend, not the day. A weekly average matters more than any single weigh-in, since daily weight bounces around inside a kilo or two regardless of what you do.
Before any significant change — especially with an existing health condition — check in with a doctor or registered dietitian. To plan the energy side, pair this with the calorie deficit calculator and the BMI calculator.
What can shift or widen your healthy range
The 18.5–24.9 band is a population screening tool, and the same limitations that apply to BMI apply to the range it produces. For some people the realistic healthy range sits a little higher, a little lower, or simply wider than the table suggests.
Muscle can push you above the range
Because the range is built from BMI, it counts only total weight, not what that weight is. Muscle is denser than fat, so athletes and regular lifters can weigh above their healthy range while carrying very little body fat. For them the range reads "over" when their health does not — the better check is body composition, not the scale.
Asian populations may use a lower upper limit
Metabolic risk appears at a lower BMI in many people of South and East Asian descent, so the WHO Western Pacific guidance and several national bodies lower the overweight cut-off to about 23 rather than 25. In practical terms, that pulls the top of the healthy range down — the lower edge (18.5) is unchanged, but the upper limit shifts from a BMI of 24.9 toward 22.9–23.
Age, pregnancy, and build
Older adults often carry more fat at the same weight as muscle declines, so a weight inside the range may still warrant a body-composition check. The standard band also does not apply during pregnancy, where weight gain is expected and guided separately. And a large-framed build naturally sits higher in the range than a small-framed one at the same height.
Above or below your healthy range
The two limits of your range mark the lines into the next BMI categories. Crossing them is not a diagnosis, but it is a signal worth understanding.
Wherever you sit, the range is a starting point for a conversation, not the end of one. To place a specific weight on the full BMI scale, use the BMI calculator; to see how your height itself ranks, the height percentile calculator.
Data sources and methodology
The calculator derives your healthy weight range from the WHO healthy BMI band of 18.5–24.9: the lower limit is 18.5 × height(m)² and the upper limit is 24.9 × height(m)². The by-height chart applies that band across common heights, rounded to the nearest unit, and the ranges are identical for men and women. The band applies to adults aged 20 and over; children and teens are assessed on the CDC's BMI-for-age growth charts. The lower Asian-population overweight cut-off (around 23) follows WHO Western Pacific guidance.
Healthy BMI band (18.5–24.9): World Health Organization adult classification, also published by the US NIH/NHLBI and CDC.Lower BMI cut-offs for Asian populations (overweight ≈23): WHO Western Pacific Region expert consultation.Frequently asked questions about the free healthy weight calculator
About this healthy weight calculator
This healthy weight calculator runs entirely in your browser. Your height never leaves your device — nothing is sent to a server, logged, or shared. It derives your healthy weight range from the WHO healthy BMI band (18.5–24.9), returning a lower limit of 18.5 × height(m)² and an upper limit of 24.9 × height(m)², updating instantly on every change.
Calculators Cloud offers 400+ free tools with no sign-up. The whole Health calculators shelf includes the BMI, ideal weight, Body fat %, and height percentile tools alongside this one. Or browse the full calculator directory.