BMI Calculator & Health Dashboard

Calculate your Body Mass Index (BMI), Basal Metabolic Rate (BMR), daily calorie needs (TDEE), and ideal weight. Includes personalized nutrition and activity recommendations.

⚖️ Semicircle Gauge 🔥 BMR & TDEE 📋 History & Charts
lbs
ft
in
Used to calculate your metabolic rate (BMR)
UnderNormalOverObese25.8Overweight
10.018.525.030.045.0
📊 BMI Status
25.8Overweight

Healthy BMI range: 18.5 – 24.9

⚠️ Lose 6.4 lbs to reach the healthy range (BMI 24.9).
⚖️ Ideal weight range137 – 168 lbsRobinson Formula (1983) for height 5′9″
MinHealthyMax
🔥 Metabolic Rate (BMR)1,744 kcal/day

Energy burned at complete rest to sustain vital organ functions.

Formula: Mifflin-St Jeor
🍽️ Daily Calorie Needs (TDEE)2,703 kcal/day

Calories burned daily based on activity level. Consume this amount to maintain current weight.

🎯 Estimated Daily Calories by Goal
Weight Loss (-2 lbs/wk)1,703 kcal
Weight Loss (-1 lb/wk)2,203 kcal
Maintain Weight2,703 kcal
Weight Gain (+1 lb/wk)3,203 kcal
Weight Gain (+2 lbs/wk)3,703 kcal

💡 Personalised Recommendations — based on your results

A moderate daily deficit of 500 calories (target: 2,203 kcal/day) leads to ~1 lb of weight loss per week.
Prioritise protein at every meal — aim for 0.7–1g per pound of body weight to preserve muscle while losing fat.
Walking 30 minutes daily burns roughly 150–200 extra calories and improves metabolic health significantly.
Focus on whole foods, adequate sleep (7–9 hrs), and stress management, which all directly affect weight.

Disclaimer: The health recommendations and calculations provided by this tool are estimates for informational purposes only. This is not medical advice. Always consult with a physician or qualified health provider before starting any nutrition, fitness, or weight management regimen.

📈 Your BMI History

Your saved results will appear here. Tap "Save Result" to track your progress over time.

Frequently Asked Questions

For adults aged 20 and older, a healthy BMI (Body Mass Index) falls between 18.5 and 24.9. This range is defined by the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) as having the lowest correlation with chronic health risks.
BMI is calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). For imperial units, the formula is: weight in pounds divided by height in inches squared, multiplied by a conversion factor of 703: BMI = (lbs ÷ inches²) × 703.
BMI does not differentiate between fat, muscle, and bone, and uses the same scale for both men and women. In general, women tend to have higher body fat percentages than men at the same BMI. While helpful for broad screenings, it should be paired with other measurements like body fat percentage.
A BMI of 30 or higher is classified as obese. Obese status is categorized further into Class 1 (BMI of 30 to <35), Class 2 (BMI of 35 to <40), and Class 3 or severe obesity (BMI of 40 or higher).
The standard healthy BMI range (18.5–24.9) applies to all adults. However, research suggests that for older adults (65 and older), a slightly higher BMI of 22 to 29 is associated with lower mortality rates and better health outcomes.
Yes. This is colloquially known as 'skinny fat' or metabolically obese normal-weight (MONW). A person can have a normal BMI but high levels of visceral fat, low muscle mass, and metabolic risks like insulin resistance or high blood pressure.
BMR (Basal Metabolic Rate) is the minimum number of calories your body needs to maintain basic life functions at rest (breathing, circulating blood, cell production). It forms the foundation of your daily calorie expenditure calculations.
TDEE (Total Daily Energy Expenditure) is the total number of calories you burn per day, including physical activity and digestion. While BMR represents energy burned at rest, TDEE accounts for all movements, calculated by multiplying your BMR by an activity factor.
To lose about one pound per week, a calorie deficit of 500 calories per day below your TDEE is recommended. This can be achieved through a combination of diet adjustments and physical activity. You should avoid consuming less than 1,200 calories/day (women) or 1,500 calories/day (men) unless supervised by a physician.
An adult BMI between 25.0 and 29.9 is classified as overweight. This range indicates excess body weight relative to height but is below the threshold for obesity classification.
Because muscle is denser than fat, muscular individuals (like bodybuilders or athletes) may have a high BMI that classifies them as overweight or obese, despite having very low body fat. For these individuals, waist circumference or body fat scans are better health measures.
Technically, a BMI of exactly 25.0 is the entry point of the 'overweight' category. However, a small variation is normal, and clinical context (such as muscle percentage and distribution of fat) is required to determine if it represents a true health risk.

Understanding Your BMI and What It Means

Managing your wellness starts with understanding your body metrics. A BMI calculator is a simple yet powerful screening tool that estimates whether your weight falls into a healthy range relative to your height. Recognized worldwide by organizations like the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC), this body mass index calculator serves as a preliminary guide for identifying potential health risks.

How BMI Is Calculated (Imperial and Metric)

The math behind the calculation is straightforward. Our tool accommodates both measurement systems, serving as a bmi calculator metric and bmi calculator imperial.

For metric inputs (using a bmi calculator kg cm), the formula is weight in kilograms divided by height in meters squared:

BMI = weight (kg) / [ height (m) ]²

For imperial inputs (using a bmi calculator lbs inches), the formula multiplies the weight-to-height ratio by a conversion factor of 703:

BMI = 703 × weight (lbs) / [ height (in) ]²

Analyzing the Standard BMI Chart

Once your index is calculated, it is categorized using the standard bmi chart:

  • Underweight: BMI below 18.5
  • Normal weight: BMI between 18.5 and 24.9 (often cited as what is a healthy bmi range)
  • Overweight: BMI between 25.0 and 29.9 (classified as an overweight bmi)
  • Obese: BMI of 30.0 or higher (classified as an obese bmi)

These thresholds are standardized for a bmi calculator adults. For children and teens, health professionals use a bmi calculator by age and sex, comparing results to growth percentiles rather than absolute values.

Metabolic Rate (BMR) and Daily Expenditure (TDEE)

While BMI is useful, a complete health dashboard requires metabolic context. That is why our tool functions as a bmi and calorie calculator, integrating a bmr calculator and tdee calculator.

Using the Mifflin–St Jeor formula, the BMR calculation estimates the calories your body requires to survive at complete rest. Since BMR varies by body composition, it is calculated as a bmi calculator for men or bmi calculator for women. Next, the tool multiplies your BMR by your physical activity level to calculate your Total Daily Energy Expenditure (TDEE) — the true starting point for dietary planning.

Limitations of BMI and Finding Your Ideal Weight

Although a free bmi calculator is a helpful starting point, it has limitations. It cannot differentiate between muscle mass and fat. An athlete with high muscle mass might register an overweight index, whereas an inactive individual might have a normal index despite having low muscle and high body fat.

Therefore, using this as a healthy weight calculator and ideal weight calculator should be paired with assessments like waist-to-height ratio, biological context (with a bmi calculator with age), and consultation with medical professionals.

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Calculators are for informational purposes only. Not financial, tax, or medical advice.