Free adult health calculator

Healthy Weight Range Calculator

Enter your height to estimate the adult weight range corresponding to a body mass index from 18.5 to 24.9, displayed in both kilograms and pounds.

  • Metric and imperial height inputs
  • Results in kilograms and pounds
  • Your information stays on your device

Enter your height

This calculator uses standard adult BMI reference boundaries and is intended for adults aged 20 years and older.

Enter a height between 100 and 250 cm.
Height
Enter feet and any additional inches.

Only height is required. The result is a height-based BMI reference range, not a personalised ideal weight or treatment target.

Your reference range will appear here

Enter your height to calculate the adult weight range corresponding to BMI values from 18.5 to 24.9.

Height-based BMI reference range

0–0 kg kilograms Corresponding to adult BMI 18.5–24.9
Lower reference boundary 0 kg Corresponds to BMI 18.5
Upper reference boundary 0 kg Corresponds to BMI 24.9
Equivalent range in the other unit 0–0 lb
Height used 0 cm

This range is derived mathematically from standard adult BMI boundaries. It does not account for muscle mass, body composition, pregnancy, medical history or individual health needs.

Three simple steps

How to Use the Healthy Weight Range Calculator

You only need your height. The calculator uses it to estimate the weight range corresponding to an adult BMI from 18.5 through 24.9.

Choose Your Measurement System

Select metric to enter your height in centimetres or imperial to enter your height in feet and inches.

Enter Your Height

Enter an accurate height using the selected units. If practical, measure without shoes and stand upright on a level surface.

Review the Reference Range

Select the calculate button to see the corresponding range in kilograms and pounds, along with the values used to produce it.

What You Will Need

  • Your current height measured as accurately as practical.
  • Centimetres or a combination of feet and inches.
  • The correct measurement system selected before calculating.
  • An understanding that this calculator is intended for adults aged 20 years and older.

What the Result Includes

  • A reference weight range displayed in both kilograms and pounds.
  • The lower boundary calculated using an adult BMI of 18.5.
  • The upper boundary calculated using an adult BMI of 24.9.
  • The height used in the calculation so you can check your entry.

Formula and methodology

How Is the Healthy Weight Range Calculated?

The calculator rearranges the standard adult BMI equation to find the weights corresponding to the lower and upper boundaries of the adult healthy-weight BMI category.

The Calculation Formula

BMI is normally calculated by dividing weight in kilograms by height in metres squared. To calculate a weight from a selected BMI boundary, the equation is rearranged.

Standard BMI equation BMI = weight (kg) ÷ height² (m)
Rearranged weight equation Weight (kg) = BMI × height² (m) Height is converted to metres before it is squared.
Lower Boundary 18.5 × height²

Calculates the weight corresponding to an adult BMI of 18.5.

Upper Boundary 24.9 × height²

Calculates the weight corresponding to an adult BMI of 24.9.

Lower BMI Boundary

The lower result is the weight that produces a BMI of 18.5 at the height entered.

Upper BMI Boundary

The upper result is the weight that produces a BMI of 24.9 at the same height.

Rounded Results

Displayed weights are rounded for readability, so very small differences may occur if the calculation is repeated manually.

Formula and adult BMI category reference: Centers for Disease Control and Prevention — Adult BMI Categories .

Reading your estimate

Understanding Your Healthy Weight Range Result

Your result contains a lower and upper weight calculated from your height. These numbers describe a standard adult BMI reference interval—not a precise personal target.

Why the Calculator Shows a Range

Many different weights can correspond to an adult BMI from 18.5 through 24.9 at the same height. For that reason, the calculator returns an interval rather than selecting one number as your ideal weight.

Lower result Weight corresponding to BMI 18.5
Upper result Weight corresponding to BMI 24.9

Every point along this line represents a different weight within the standard adult BMI reference category for the height entered.

The Lower Number

This is the estimated weight at which your BMI would equal 18.5. It is a category boundary, not a recommendation to aim for the lowest value.

The Space Between

The numbers between the boundaries fall within the standard adult BMI reference interval. No single point within that interval is automatically best for every person.

The Upper Number

This is the estimated weight at which your BMI would equal 24.9. It is also a category boundary rather than a personalised maximum or treatment threshold.

What the Range Does Not Measure

BMI is calculated from height and weight. It does not directly measure body fat or provide a complete assessment of health, body composition or individual risk.

  • Muscle and fat mass The formula cannot distinguish muscle, body fat, bone or other components of body weight.
  • Fat distribution It does not show where body fat is carried, including whether more is carried around the waist.
  • Individual differences The relationship between BMI, body composition and health can vary with factors such as age, sex and ethnicity.
  • Personal circumstances Pregnancy, medical conditions, disability, medicines and individual health goals require additional context.

Supporting information: CDC Adult BMI Categories and National Academies review of BMI strengths and limitations .

Quick reference chart

Healthy Weight Range Chart by Height

This chart shows approximate adult weight ranges corresponding to a BMI from 18.5 through 24.9 for several common heights.

Metric Height Exact height used for each calculation
Imperial Height Rounded equivalent shown for reference
BMI Boundaries Calculated using 18.5 and 24.9

Swipe sideways to view the complete table

Adult BMI Reference Weight Ranges

BMI 18.5–24.9
Healthy weight range chart showing height in centimetres, approximate feet and inches, kilograms and pounds.
Height Approx. Feet and Inches Range in Kilograms Range in Pounds
150 cm 4 ft 11 in 41.6–56.0 kg 91.8–123.5 lb
155 cm 5 ft 1 in 44.4–59.8 kg 98.0–131.9 lb
160 cm 5 ft 3 in 47.4–63.7 kg 104.4–140.5 lb
165 cm 5 ft 5 in 50.4–67.8 kg 111.0–149.5 lb
170 cm 5 ft 7 in 53.5–72.0 kg 117.9–158.6 lb
175 cm 5 ft 9 in 56.7–76.3 kg 124.9–168.1 lb
180 cm 5 ft 11 in 59.9–80.7 kg 132.1–177.9 lb
185 cm 6 ft 1 in 63.3–85.2 kg 139.6–187.9 lb
190 cm 6 ft 3 in 66.8–89.9 kg 147.2–198.2 lb
195 cm 6 ft 5 in 70.3–94.7 kg 155.1–208.7 lb
200 cm 6 ft 7 in 74.0–99.6 kg 163.1–219.6 lb

Calculation note: Values are rounded to one decimal place. The feet-and-inches column contains approximate equivalents, while each weight range was calculated using the exact centimetre height shown.

Adult BMI boundaries and interpretation: Centers for Disease Control and Prevention .

Choosing the right tool

Healthy Weight Range Calculator vs BMI Calculator

These calculators use the same underlying BMI formula, but they use different inputs and answer different questions.

Current page

Healthy Weight Range Calculator

Uses your height to calculate the weights corresponding to the standard adult BMI interval from 18.5 through 24.9.

  • Requires your height only
  • Returns a reference range in kilograms and pounds
  • Does not calculate your current BMI
  • Does not select one ideal or target weight
Related calculator

BMI Calculator

Uses your current height and weight to calculate your BMI and identify the corresponding standard adult BMI category.

  • Requires both current height and current weight
  • Returns one calculated BMI number
  • Shows the corresponding adult BMI category
  • Can be compared with the reference interval

Swipe sideways to view the complete comparison

Calculator Comparison

Use the question you want answered to decide which tool is more appropriate.

Comparison of the Healthy Weight Range Calculator and the BMI Calculator.
Comparison Healthy Weight Range BMI Calculator
Main question What BMI reference weight range corresponds to my height? What is my current BMI based on my height and weight?
Information needed Height Height and current weight
Primary result A lower-to-upper reference weight range One BMI number and its corresponding category
Measurement systems Metric and imperial Metric and imperial
Intended users Adults aged 20 years and older Adults aged 20 years and older
What it cannot provide A personalised ideal weight or complete health assessment A diagnosis, direct body-fat measurement or complete health assessment

Both results require context: BMI-based tools are screening and reference tools. Neither calculator directly measures body fat, distinguishes muscle from fat or replaces an individual assessment by a qualified health professional.

Supporting information: CDC Adult BMI Calculator and CDC About Body Mass Index .

Appropriate use and safety

Who Should Use This Calculator?

This tool provides a general BMI-based weight reference for adults. Some people require a different assessment method or additional professional interpretation.

Designed for Adults Aged 20 Years and Older

The calculator applies the standard fixed adult BMI boundaries of 18.5 through 24.9. It can provide a quick general reference when those adult boundaries are appropriate, but it does not confirm that every weight within the interval is suitable for a particular person.

Children and Teenagers

Do not use fixed adult BMI boundaries for someone aged 2 through 19. BMI in children and teenagers is interpreted using age- and sex-specific BMI percentiles and growth charts. A doctor or other qualified health professional can help interpret growth appropriately.

Pregnancy and After Pregnancy

This height-only adult range is not a pregnancy weight-gain guide. Pregnancy recommendations consider factors such as pre-pregnancy measurements, stage of pregnancy and whether more than one baby is expected. Ask your doctor or midwife for individual guidance.

People With Substantial Muscle Mass

Because BMI does not distinguish muscle from body fat, the displayed range may be less informative for some athletes, strength-trained adults or other people with comparatively high muscle mass.

Older Adults or People With Frailty

Changes in muscle mass, mobility, appetite, medical history and nutritional needs may affect how a BMI-based range should be interpreted. A personalised assessment may be more useful than relying on the calculated interval alone.

Medical Conditions, Medicines or Disability

Fluid retention, reduced mobility, changes in muscle mass, medical treatment, medicines and some health conditions can affect weight or the meaning of a BMI-based result. Do not change prescribed treatment, nutrition support or medicines in response to this calculator.

A broader health picture

A Healthy Weight Is More Than a BMI Range

The calculated interval can provide a useful starting reference, but a more complete view considers body composition, fat distribution, health history, daily habits and clinical information.

Use Several Pieces of Information

BMI describes weight relative to height. It does not directly measure body fat, muscle, fitness, nutrition or overall health. Its meaning is stronger when considered alongside other relevant information rather than used as a stand-alone judgement.

  • Medical history Existing conditions, family history and current treatment may affect interpretation.
  • Physical findings Blood pressure, muscle mass, mobility and other findings can provide additional context.
  • Laboratory information Glucose, cholesterol and other clinician-selected tests may contribute to a broader assessment.
  • Daily habits Food patterns, movement, sleep, stress and medicines can influence weight and health.

Supporting information: CDC — About Body Mass Index and NIDDK — Factors Affecting Weight and Health .

Common questions

Healthy Weight Range Calculator FAQs

Find answers about the calculation, adult BMI boundaries, interpretation, measurement systems and situations requiring additional guidance.

What is a healthy weight range for my height?

For adults aged 20 years and older, this calculator estimates the weights corresponding to a BMI from 18.5 through 24.9 at the height entered. The resulting interval is a general adult BMI reference range, not a personalised ideal-weight recommendation.

How does the Healthy Weight Range Calculator work?

The calculator converts your height to metres and squares it. It multiplies the squared height by 18.5 to calculate the lower boundary and by 24.9 to calculate the upper boundary. It then converts the results between kilograms and pounds for display.

Why does the calculator only ask for my height?

The purpose of this calculator is to find the weights that correspond to selected BMI boundaries at a particular height. Your current weight is not needed for that calculation. To calculate your present BMI, use the BMI Calculator, which requires both height and weight.

Is the middle of the range my ideal weight?

No. The midpoint has no special status and is not automatically the ideal weight for an individual. A suitable weight can depend on body composition, health history, nutritional needs, life stage, medicines, mobility and other factors that the calculator cannot assess.

Why is the calculated weight interval so wide?

The interval covers every weight corresponding to a BMI from 18.5 through 24.9 at the height entered. Because this covers several BMI points rather than one selected value, the difference between the lower and upper weights can be substantial.

Can children or teenagers use this calculator?

No. Fixed adult BMI boundaries are not appropriate for people aged 2 through 19. Children and teenagers are assessed using BMI-for-age percentiles that account for age and sex. Parents and caregivers should discuss growth or weight concerns with an appropriate health professional.

Can I use this calculator during pregnancy?

This calculator is not a pregnancy weight-gain guide. Pregnancy recommendations require factors such as pre-pregnancy measurements, stage of pregnancy and whether more than one baby is expected. Ask your doctor or midwife for guidance appropriate to your pregnancy.

Does having more muscle affect the result?

The mathematical range does not change because the formula uses height and BMI boundaries only. However, BMI cannot distinguish muscle from fat or bone. The result may therefore require additional interpretation for athletes, strength-trained adults and other people with substantial muscle mass.

What should I do if my current weight is outside the range?

A result outside the interval does not diagnose a health condition or prove that a particular change is necessary. Avoid making abrupt weight, eating, exercise or medicine changes based only on this calculator. If you are concerned, seek advice from a qualified health professional who can consider your circumstances.

Why might another healthy weight calculator give a different result?

Calculators may use different BMI boundaries, equations, rounding rules or unit-conversion methods. Some may use an upper boundary of 25 rather than 24.9, while others may apply different population-specific guidance. Check the published method before comparing results.

Supporting information: CDC BMI Frequently Asked Questions and CDC Child and Teen BMI Calculator .

Evidence and transparency

Sources, Methodology and Trust Standards

This calculator uses established adult BMI formulas and category boundaries. We explain the calculation, show its limitations and link to the primary health-information sources supporting the page.

Primary References

External sources open in a new tab. Their inclusion does not imply endorsement of EverythingCalculated.com, and their content may be updated independently.

Free adult reference calculator

Ready to Calculate Your Healthy Weight Range?

Enter your height to estimate the weight interval associated with an adult BMI from 18.5 through 24.9, then review the explanation and limitations alongside your result.

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