Calculadora de IMC: índice de masa corporal y rango de peso saludable
Calculate your Body Mass Index (BMI)
Quick reference: 5'0" ≈ 152 cm · 5'4" ≈ 163 cm · 5'7" ≈ 170 cm · 5'8" ≈ 173 cm · 5'11" ≈ 180 cm · 6'2" ≈ 188 cm
Your BMI
24.2
Normal
Healthy range for your height: 53.5 kg to 72.0 kg
BMI is a screening number, not a diagnosis. It does not apply to children or teenagers, and it can mislead for very muscular people, older adults and during pregnancy. Talk to a doctor about your health.
BMI Prime (BMI / 25)
0.97
1.00 is the top of the normal range
Ponderal Index (kg/m3)
14.2
Weight against height cubed
WHO adult BMI classes
| WHO class | BMI (kg/m2) |
|---|---|
| Severe thinness | below 16 |
| Moderate thinness | 16 to 16.99 |
| Mild thinness | 17 to 18.49 |
| Normal range (you) | 18.5 to 24.99 |
| Pre-obese (overweight) | 25 to 29.99 |
| Obese class I | 30 to 34.99 |
| Obese class II | 35 to 39.99 |
| Obese class III | 40 and above |
You are in: Normal range. Source: WHO adult BMI classification (WHO Technical Report Series 894, 2000). The Asian cut-offs option above changes the main category but not this table.
Target weight
A BMI of 24.9 at your height is 72.0 kg, which is gain 2.0 kg.
Formula and worked example
1. Height in metres
height in cm / 100
Using cm = 170
Result: 1.7
2. BMI
weight in kg / (height in m)^2
Using weight = 70.0 kg; height = 1.7 m
Result: 24.2
3. BMI Prime
BMI / 25
Using BMI = 24.2
Result: 0.97
4. Ponderal Index
weight in kg / (height in m)^3
Using weight = 70.0 kg; height = 1.7 m
Result: 14.2 kg/m3
5. WHO class
the WHO adult BMI table row that contains the BMI
Using BMI = 24.2
Result: Normal range (18.5 to 24.99)
Reading results never uses a trial use. Copying, saving or printing uses 1 per visit.
About BMI Calculator
Calculates Body Mass Index (BMI) from your height and weight — one general, widely-used (though imperfect) health screening measure. Accepts either metric (kg/cm) or imperial (lb/ft+in) units. For daily calorie needs specifically, use the separate Calorie Calculator tool.
Choose your preferred units, enter your height and weight, and your BMI and category are calculated automatically. Age, sex and waist are optional: under age 20 adult categories are hidden, the Asian cut-offs option moves the overweight and obese lines to 23 and 27.5, and a waist measurement adds a waist-to-height ratio.
BMI doesn't distinguish between muscle and fat, so it can be misleading for very muscular individuals or older adults with reduced muscle mass — it's a useful general screening number, not a complete picture of health on its own.
Watch: BMI Calculator in Action
- ¿Cuál es un peso saludable para mi estatura?
- La calculadora muestra los pesos que dan un IMC de 18,5 y de 24,9 a tu estatura (22,9 en el extremo superior si eliges los límites para población asiática) y cuántos kg o lb tendrías que bajar o subir para llegar a ese rango.
- ¿El IMC mide por completo mi salud?
- No. El IMC no distingue entre músculo y grasa, así que puede ser engañoso en personas muy musculosas o en adultos mayores con menos masa muscular. Es un número útil para una primera revisión, pero no muestra por sí solo un panorama completo de la salud.
- ¿Cómo se calcula el IMC en esta página?
- El peso en kilogramos se divide entre el cuadrado de la estatura en metros. Los datos en medidas imperiales se convierten antes, con 2,54 cm por pulgada y 0,45359237 kg por libra. El resultado se muestra con un decimal y se recalcula con cada tecla que escribes.
- ¿Cuáles son los límites de cada categoría?
- Menos de 18,5 es bajo peso; de 18,5 hasta menos de 25 es normal; de 25 hasta menos de 30 es sobrepeso; y 30 o más es obesidad. Son los rangos habituales para adultos y la herramienta los aplica a todos los datos.
- Why does it say my height or weight is out of range?
- Heights from 100 to 250 cm and weights from 30 to 300 kg are accepted, or the same span in feet, inches and pounds. Anything outside shows a message and no result. If you type a height like 1.7, the message asks for centimeters.
- Where does the healthy range line come from?
- It shows the weights that produce BMI 18.5 and BMI 24.9 at your height, found by multiplying each value by your height in meters squared. It is the main formula run backwards, so it changes only when your height changes.
- Does BMI work for athletes or older adults?
- It can mislead. The formula cannot tell muscle from fat, so a muscular person may land in Overweight, and an older adult who has lost muscle may land in Normal. Treat the number as a rough screen, not a verdict.
- What is a healthy BMI?
- For adults, 18.5 up to 24.9 is the usual healthy range. Under 18.5 is underweight, 25 to 29.9 is overweight and 30 or more is obese. With the Asian cut-offs ticked, the healthy range ends at 22.9 and obese starts at 27.5.
- Is BMI different for Asian adults?
- Yes, the lines are lower. Tick the Asian cut-offs box and the page moves overweight to 23 and obese to 27.5, then recalculates your category and the weight you would need to reach the healthy range.
- Can children and teenagers use it?
- No. Adult categories do not apply under 20. If you enter an age under 20 the page hides the category and explains that, for ages 2 to 19, BMI is read as a percentile for age and sex on the CDC growth charts. Ask a doctor about a child's weight.
- What are obesity classes 1, 2 and 3?
- They are the WHO bands for adults: class 1 is a BMI of 30 to 34.9, class 2 is 35 to 39.9 and class 3 is 40 or more. The table under your result shows all eight WHO classes and marks the one you are in.
- What is the waist-to-height ratio?
- Your waist divided by your height. Enter an optional waist measurement and the page shows the ratio and compares it with the common guideline of keeping your waist under half your height.
- Who should not rely on BMI?
- Children and teenagers, pregnant women, very muscular people and older adults who have lost muscle. BMI is a screening number, not a diagnosis, so talk to a doctor about your own health.
- ¿Se guardan mis datos?
- No. La estatura y el peso se quedan en tu navegador y nunca se almacenan ni se suben.
How to use BMI Calculator
Choose a unit system with the two buttons at the top: Metric (kg / cm) or Imperial (lb / ft-in). Enter your weight in the first box. For height, metric mode takes centimeters in one box, while imperial mode gives separate feet and inches boxes. The form opens with 70 kg and 170 cm so a result is visible immediately, and the result card updates as you type.
The card shows your BMI to one decimal place, a category label (Underweight, Normal, Overweight or Obese) and a line giving the weight range that falls between BMI 18.5 and 24.9 at your height. Switching between metric and imperial converts the numbers already entered instead of clearing them. If a value is out of range, a red message under the box explains what is expected.
When to use it
Useful for a quick, private check of where a height and weight pair sits on the standard adult scale, for example before a routine appointment, when a form asks for your BMI, or when you are curious what a given weight change would mean. The range line shows what BMI 18.5 to 24.9 looks like in kilograms or pounds at your height.
When not to use it
Do not rely on it for children and teenagers, whose BMI is judged against age and sex charts, or during pregnancy. It also misleads for people with a lot of muscle, and says nothing about where body fat sits, fitness or blood results. For decisions about weight, ask a doctor or dietitian, who can use measurements this calculator cannot.
Tips for best results
Enter height in centimeters, not meters: typing 1.70 in the centimeter box triggers a hint telling you to enter 170. Weigh yourself at a consistent time, such as the morning, if you compare readings over several weeks. To set a target, read the healthy range line first, since it already converts the BMI band into kilograms or pounds for your own height.
Limitations
The formula is weight in kilograms divided by height in meters squared, with fixed cut-offs at 18.5, 25 and 30. The tool does not adjust for age, sex, ethnicity or muscle mass. It accepts weights from 30 to 300 kg and heights from 100 to 250 cm. BMI is a rough screening number, and this result is general information and not medical or professional advice.
Privacy
Your height and weight are used only for the calculation, which runs in your browser as you type. They are not stored, tied to an account or sent anywhere, so closing the tab erases them. The page does report a small usage count naming the tool, but it carries none of the numbers you entered.
Next: Body Fat Calculator
Get a more complete picture than BMI alone gives
More from Health Calculators: