Calculadora de BMI
Calcula tu Índice de Masa Corporal para conocer tu peso en relación a tu altura
What is BMI and how do you calculate it?
BMI (Body Mass Index) is calculated by dividing your weight in kilograms by your height in meters squared: BMI = kg/m². A BMI of 18.5-24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
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Create Free Account¿Qué es el BMI?
El Índice de Masa Corporal (BMI) es una medida sencilla de la grasa corporal basada en tu altura y peso. Se calcula dividiendo tu peso en kilogramos entre tu altura en metros al cuadrado. Aunque el BMI no mide directamente la grasa corporal, ofrece un punto de partida útil para saber si tu peso puede estar afectando tu salud. Los profesionales sanitarios de todo el mundo utilizan el BMI como herramienta de cribado para identificar posibles problemas de salud relacionados con el peso.
¿Cómo se calcula el BMI?
La fórmula del BMI es: BMI = peso (kg) / altura (m)². Para unidades imperiales, se multiplica por 703: BMI = peso (lbs) / altura (in)² × 703. El resultado se clasifica en categorías: bajo peso (menos de 18,5), peso normal (18,5-24,9), sobrepeso (25-29,9) y obesidad (30 o más). Estas categorías ayudan a indicar posibles riesgos para la salud, aunque también deben considerarse factores individuales como la masa muscular y la composición corporal.
Limitaciones del BMI
Aunque el BMI es una herramienta de cribado útil, tiene sus limitaciones. No distingue entre masa muscular y masa grasa, por lo que deportistas o personas musculosas pueden tener un BMI alto a pesar de estar sanas. Tampoco tiene en cuenta la edad, el sexo, la etnia ni la distribución de la grasa corporal. Para tener una imagen completa de tu salud, considera el BMI junto con otras mediciones como el perímetro de cintura, el porcentaje de grasa corporal y tu nivel de forma física general.
BMI vs BMR: What's the Difference?
BMI measures your weight relative to height to categorize your body size. BMR measures the calories your body burns at rest. BMI tells you if you're at a healthy weight; BMR tells you how much energy your body needs. Use both together for a complete picture of your health.
Frequently Asked Questions
What is a healthy BMI range?
A healthy BMI range is between 18.5 and 24.9. This range is associated with the lowest risk of weight-related health problems. However, BMI is just one indicator and should be considered alongside other health markers.
Is BMI accurate for athletes and muscular people?
BMI can overestimate body fat in athletes and muscular individuals because it doesn't distinguish between muscle and fat mass. If you have significant muscle mass, consider using body fat percentage measurements for a more accurate assessment.
How often should I check my BMI?
Checking your BMI monthly is sufficient for most people. Since BMI changes gradually with weight changes, weekly checks are unnecessary. Focus on long-term trends rather than daily fluctuations.
What should I do if my BMI is too high or too low?
If your BMI falls outside the normal range, consult a healthcare professional. For high BMI, focus on a balanced diet and regular exercise. For low BMI, ensure adequate nutrition and caloric intake. A personalized workout plan can help you reach a healthy weight.
Does BMI differ by age and gender?
Standard BMI categories apply to adults aged 20 and older regardless of gender. For children and teens, BMI is calculated the same way but interpreted using age- and sex-specific percentiles. Older adults may have slightly different healthy ranges.