BMI Calculator & Target Weight Tool
Our Precision BMI Calculator does more than just calculate your current Body Mass Index. It helps you understand your weight category and lets you discover your target weight through a unique "Reverse BMI" mode. Whether you are aiming for a specific health goal or just monitoring your metrics, this tool provides the insights you need.
Personal Parameters Console
Adjust your sliders or numbers to compute metabolic parameters instantly
Clinical Presets Library
Click average body benchmarks to sync metrics instantly
Potential Health Risks
- Optimal cardiovascular wellness parameters
- Low statistical risk of metabolic chronic diseases
Recommended Actions
- Maintain active dietary and lifestyle standards
- Aim for 150 minutes of weekly aerobic exercise
- Maintain balanced hydration and whole foods
BMI Height-Weight Classification Matrix
Healthy, overweight, and obese thresholds calculated across heights
| Height (ft/in / cm) | Healthy Weight Range (18.5 - 24.9) | Overweight Boundary (> 25.0) | Obese Class I Boundary (>= 30.0) | Underweight Boundary (< 18.5) |
|---|---|---|---|---|
| 4 ft 10 in(147 cm) | 89 - 119 lbs | 119.7 lbs | 143.7 lbs | 88.6 lbs |
| 4 ft 11 in(150 cm) | 92 - 123 lbs | 123.9 lbs | 148.6 lbs | 91.5 lbs |
| 5 ft 0 in(152 cm) | 95 - 127 lbs | 128.1 lbs | 153.6 lbs | 94.8 lbs |
| 5 ft 1 in(155 cm) | 98 - 132 lbs | 132.5 lbs | 158.9 lbs | 97.9 lbs |
| 5 ft 2 in(157 cm) | 102 - 136 lbs | 136.7 lbs | 164.0 lbs | 101.2 lbs |
| 5 ft 3 in(160 cm) | 105 - 141 lbs | 141.3 lbs | 169.3 lbs | 104.5 lbs |
| 5 ft 4 in(163 cm) | 108 - 145 lbs | 145.7 lbs | 174.8 lbs | 107.8 lbs |
| 5 ft 5 in(165 cm) | 112 - 150 lbs | 150.1 lbs | 180.3 lbs | 111.3 lbs |
| 5 ft 6 in(168 cm) | 115 - 154 lbs | 155.0 lbs | 186.9 lbs | 114.8 lbs |
| 5 ft 7 in(170 cm) | 119 - 159 lbs | 159.6 lbs | 191.6 lbs | 118.1 lbs |
| 5 ft 8 in(173 cm) | 122 - 164 lbs | 164.4 lbs | 197.5 lbs | 121.7 lbs |
| 5 ft 9 in(175 cm) | 126 - 169 lbs | 169.3 lbs | 203.3 lbs | 125.2 lbs |
| 5 ft 10 in(178 cm) | 129 - 174 lbs | 174.4 lbs | 214.9 lbs | 128.9 lbs |
| 5 ft 11 in(180 cm) | 133 - 179 lbs | 179.2 lbs | 218.2 lbs | 132.7 lbs |
| 6 ft 0 in(183 cm) | 137 - 184 lbs | 184.5 lbs | 221.3 lbs | 136.4 lbs |
| 6 ft 1 in(185 cm) | 141 - 189 lbs | 189.6 lbs | 227.7 lbs | 140.4 lbs |
| 6 ft 2 in(188 cm) | 145 - 194 lbs | 194.9 lbs | 233.7 lbs | 144.2 lbs |
| 6 ft 3 in(191 cm) | 149 - 199 lbs | 200.2 lbs | 240.3 lbs | 148.1 lbs |
| 6 ft 4 in(193 cm) | 152 - 205 lbs | 205.5 lbs | 246.5 lbs | 152.1 lbs |
BMI Classification
The standard clinical BMI range segments adults as: Underweight (< 18.5), Normal weight (18.5 â 24.9), Overweight (25 â 29.9), and Obese (> 30).
BMI vs. RFM?
Unlike standard BMI, Relative Fat Mass (RFM) measures waist-to-height ratio to estimate your actual body fat percentage more accurately, distinguishing muscle from fat.
Ideal Ranges
Standard BMI is a great population check, but we recommend comparing it against RFM or WHR to get a complete, customized body composition scan.
The Math Behind BMI
Understand the clinical equations used to compute body mass indexes
𧎠Metric System Equation
This is the official international standard equation used by the World Health Organization:
BMI = weight (kg) / [height (m) à height (m)] đēđ¸ Imperial System Equation
Used primarily in the United States, utilizing a conversion multiplier coefficient:
BMI = 703 Ã weight (lbs) / [height (in) Ã height (in)] Is RFM Better Than BMI?
Medical research from institutions like Cedars-Sinai indicates that Relative Fat Mass (RFM) is generally a superior predictor of body fat percentage than standard BMI, especially for muscular athletes or individuals with atypical body builds, because it directly incorporates waist circumference instead of relying purely on total body weight.
Overview & Capabilities
Our Precision BMI Calculator does more than just calculate your current Body Mass Index. It helps you understand your weight category and lets you discover your target weight through a unique "Reverse BMI" mode. Whether you are aiming for a specific health goal or just monitoring your metrics, this tool provides the insights you need.
How to Use
Key Features
Common Use Cases
Tips & Best Practices
Related Tools
RFM Calculator
Calculate your Relative Fat Mass (RFM) instantly. A high-accuracy body fat estimator using Cedars-Sinai formula. Better than BMI for athletes. Free & mobile-first.
BMR - Basal Metabolic Rate Calculator
Calculate your Basal Metabolic Rate (BMR) instantly. Understand how many calories your body burns at rest. Free BMR calculator for men and women.
TDEE Calculator | Maintenance Calories
Calculate your TDEE and maintenance calories. Estimate calorie burn based on your activity level, age, and BMR.
WHR Calculator
Calculate your Waist-to-Hip Ratio (WHR) instantly. Identify Apple, Avocado, vs Pear body shapes and assess cardiovascular risks. Free, clinical & visual.
Calories to Kilogram Converter
Convert calories to kilograms instantly. Find the calorie deficit needed for weight loss with interactive formulas, conversion tables, and fitness insights.
Frequently Asked Questions
Q What is a healthy BMI range?
According to the World Health Organization (WHO), a BMI between 18.5 and 24.9 is classified as a "Healthy Weight" for most adults. Scores below 18.5 indicate underweight, 25 to 29.9 indicate overweight, and 30 or higher classify as obese.
Q How is BMI calculated?
The Body Mass Index is calculated using the formula: $BMI = \text{weight (kg)} \div \text{height (m)}^2$. In imperial units, the formula is: $BMI = (\text{weight (lbs)} \div \text{height (in)}^2) \times 703$.
Q What is Reverse BMI Mode?
Our unique Reverse BMI mode reverses the standard formula. Instead of entering your weight to discover your BMI, you enter your height and a target BMI score (such as 22). The engine then calculates the exact weight you need to achieve that target.
Q Why does age affect BMI parameters?
For older adults aged 65 and older, medical research indicates that a slightly higher BMI (between 23 and 29.9) is associated with better bone density, higher muscle mass, and lower overall mortality risk compared to standard adults.
Q Are there limitations to using BMI?
Yes! BMI only considers height and weight, not body composition. Athletes with high muscle mass may be classified as "overweight" or "obese" despite having very low body fat, while older adults may have high body fat percentages despite a "normal" BMI.
Q Does gender affect BMI calculations or thresholds?
Standard BMI formulas do not differentiate between males and females because overall body weight relative to height remains the mathematical constant. However, since women naturally carry more essential body fat and men carry more muscle tissue at the same weight, clinical interpretations of body fat percentages often differ by gender.
Q What is the difference between BMI and Body Fat Percentage?
BMI measures total body mass (muscle, bone, water, and fat combined) relative to your height, whereas Body Fat Percentage measures the exact proportion of adipose fat tissue relative to everything else. You can have a "normal" BMI but high body fat ("skinny fat"), or an "obese" BMI due to high muscle mass with very low body fat.