---
title: "BMI Calculator | Numequo"
description: "Estimate adult body mass index in metric or imperial units. Get a clear result with the formula, examples and useful explanations."
canonical: "https://www.numequo.com/health/body-metrics/bmi-calculator/"
locale: "en"
---
[Numequo](https://www.numequo.com/) › [Health](https://www.numequo.com/health/) › [Body metrics](https://www.numequo.com/health/body-metrics/)

# BMI Calculator

BMI compares weight with height. It is a screening estimate, not a diagnosis.

## Input data

- **Unit system** - type: choice; default: metric; options: Metric (kg, cm), Imperial (lb, in)
- **Weight** - type: number; default: 70; min: 1; max: 1500; step: 0.1
- **Height** - type: number; default: 175; min: 1; max: 300; step: 0.1; Centimetres or inches

## How it works

BMI = weight (kg) ÷ height² (m), or 703 × weight (lb) ÷ height² (in).

> This estimate is educational and is not medical advice.

## Quick examples

- **70 kg, 175 cm** - Unit system: metric, Weight: 70, Height: 175
- **150 lb, 68 in** - Unit system: imperial, Weight: 150, Height: 68
- **85 kg, 182 cm** - Unit system: metric, Weight: 85, Height: 182

## Understanding your result

The BMI value places the entered measurements within a broad reference category. It is a screening indicator and does not account for muscle mass, body composition or individual medical context.

Last verified: 29 September 2026 (2026-09-29)

## Frequently asked questions

### What is a healthy BMI?

For most adults, 18.5 to 24.9 is the conventional reference range.

### Is BMI a diagnosis?

No. It does not directly measure body fat or individual health.

### Is this suitable for children?

No. Children require age- and sex-specific growth references.

### Can athletes rely on BMI?

High muscle mass can make BMI less representative.

## Related calculators

- [Ideal Weight Calculator](https://www.numequo.com/health/body-metrics/ideal-weight-calculator/) - Compare four common height-based reference formulas.
- [Calorie Needs Calculator](https://www.numequo.com/health/nutrition-energy/calorie-calculator/) - Estimate daily energy needs using the Mifflin–St Jeor equation.
- [Waist-to-Hip Ratio Calculator](https://www.numequo.com/health/body-metrics/waist-to-hip-ratio-calculator/) - Calculate waist-to-hip ratio and compare it with general WHO reference thresholds.
- [Protein Needs Calculator](https://www.numequo.com/health/nutrition-energy/protein-needs-calculator/) - Estimate the EFSA population reference intake for protein from body weight and life stage.
- [Sleep Duration Calculator](https://www.numequo.com/health/sleep-recovery/sleep-duration-calculator/) - Calculate the elapsed time between bedtime and wake-up, including overnight sleep.

## Structured data

```json
{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "WebPage",
      "@id": "https://www.numequo.com/health/body-metrics/bmi-calculator/#page",
      "name": "BMI Calculator | Numequo",
      "description": "Estimate adult body mass index in metric or imperial units. Get a clear result with the formula, examples and useful explanations.",
      "url": "https://www.numequo.com/health/body-metrics/bmi-calculator/",
      "inLanguage": "en",
      "isPartOf": {
        "@type": "WebSite",
        "name": "Numequo",
        "url": "https://www.numequo.com/"
      }
    },
    {
      "@type": "BreadcrumbList",
      "itemListElement": [
        {
          "@type": "ListItem",
          "position": 1,
          "name": "Numequo",
          "item": "https://www.numequo.com/"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "name": "Health",
          "item": "https://www.numequo.com/health/"
        },
        {
          "@type": "ListItem",
          "position": 3,
          "name": "Body metrics",
          "item": "https://www.numequo.com/health/body-metrics/"
        },
        {
          "@type": "ListItem",
          "position": 4,
          "name": "BMI Calculator",
          "item": "https://www.numequo.com/health/body-metrics/bmi-calculator/"
        }
      ]
    },
    {
      "@type": "WebApplication",
      "name": "BMI Calculator",
      "description": "Estimate adult body mass index in metric or imperial units.",
      "url": "https://www.numequo.com/health/body-metrics/bmi-calculator/",
      "applicationCategory": "UtilitiesApplication",
      "operatingSystem": "Any",
      "offers": {
        "@type": "Offer",
        "price": "0",
        "priceCurrency": "EUR"
      }
    },
    {
      "@type": "FAQPage",
      "mainEntity": [
        {
          "@type": "Question",
          "name": "What is a healthy BMI?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "For most adults, 18.5 to 24.9 is the conventional reference range."
          }
        },
        {
          "@type": "Question",
          "name": "Is BMI a diagnosis?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "No. It does not directly measure body fat or individual health."
          }
        },
        {
          "@type": "Question",
          "name": "Is this suitable for children?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "No. Children require age- and sex-specific growth references."
          }
        },
        {
          "@type": "Question",
          "name": "Can athletes rely on BMI?",
          "acceptedAnswer": {
            "@type": "Answer",
            "text": "High muscle mass can make BMI less representative."
          }
        }
      ]
    }
  ]
}
```