BMI Calculator: Body Mass Index & FFMI Calculator
Find your exact Body Mass Index (BMI), healthy weight range, and Fat-Free Mass Index (FFMI). Built for both men and women with WHO, CDC, and Asian metabolic guidelines.
Body Mass Index & FFMI Calculator
WHO & CDC adult and pediatric guidelines
Represents standard normal BMI range (18.5 - 24.9)
Average to healthy muscularity
BMI Definition: What Is Body Mass Index?
If you are searching for bmi definition, what is a bmi, whats bmi, or whats a bmi (or in Chinese: bmi 是 什麼), Body Mass Index is a universal screening ratio used by healthcare systems worldwide. Many people look up how to measure bmi or seek to measure bmi online accurately without registration.
Whether typed as bmi bmi bmi, determining bmi calculator, weight calculator bmi, or common typos like bmi calculatir or bm1, the underlying mathematical formula divides body weight by height squared:
Imperial Formula: BMI = [Weight (lbs) ÷ Height (inches)²] × 703
BMI Index Chart for Females & Women BMI Calculator
When women seek a specialized women bmi calculator, calculate bmi women, or bmi measurement female, body composition changes across reproductive life stages, bone density, and pregnancy play vital roles. The body mass index table for female and senior female weight chart below provides target healthy boundaries across heights.
| Female Height | Underweight (<18.5) | Normal Range (18.5 - 24.9) | Overweight (25 - 29.9) | Obesity (≥30) |
|---|---|---|---|---|
| 4'11" (150 cm) | < 91 lbs | 91 - 123 lbs | 124 - 147 lbs | 148+ lbs |
| 5'1" (155 cm) | < 98 lbs | 98 - 131 lbs | 132 - 157 lbs | 158+ lbs |
| 5'3" (160 cm) | < 104 lbs | 104 - 140 lbs | 141 - 168 lbs | 169+ lbs (5 3 150 lbs female is slightly overweight) |
| 5'4" (163 cm) | < 108 lbs | 108 - 145 lbs (normal weight for 5'4 female) | 146 - 174 lbs | 175+ lbs |
| 5'5" (165 cm) | < 111 lbs | 111 - 150 lbs (5 5 weight for female) | 151 - 179 lbs | 180+ lbs |
| 5'6" (168 cm) | < 115 lbs | 115 - 154 lbs (when height is 5 6; 150 lbs 5 6 female is healthy; 180 5'6 / 180 5 6 is overweight) | 155 - 185 lbs | 186+ lbs |
| 5'7" (170 cm) | < 118 lbs | 118 - 159 lbs (ideal weight for 5 7 female / correct weight for 5'7 female) | 160 - 190 lbs | 191+ lbs |
| 5'9" (175 cm) | < 125 lbs | 125 - 169 lbs | 170 - 202 lbs | 203+ lbs |
BMI Calculator for Men & Weight Chart for Men
For male fitness enthusiasts looking up a bmi calculator for men, bmi chart for men, or weight chart for men, men naturally possess higher bone density and skeletal muscle mass. The table below outlines standard weight expectations for men by height:
| Male Height | Underweight | Healthy Weight (BMI 18.5 - 24.9) | Overweight (BMI 25 - 29.9) | Obese (BMI ≥ 30) |
|---|---|---|---|---|
| 5'6" (168 cm) | < 115 lbs | 115 - 154 lbs | 155 - 185 lbs | 186+ lbs |
| 5'8" (173 cm) | < 122 lbs | 122 - 164 lbs | 165 - 196 lbs | 197+ lbs |
| 5'10" (178 cm) | < 129 lbs | 129 - 173 lbs (average weight for 5'10 male / body mass index for 5 10 male) | 174 - 208 lbs | 209+ lbs |
| 6'0" (183 cm) | < 136 lbs | 136 - 184 lbs | 185 - 220 lbs | 221+ lbs |
| 6'2" (188 cm) | < 144 lbs | 144 - 194 lbs | 195 - 232 lbs | 233+ lbs |
Obesity Chart & Clinical Classifications
In clinical medicine, the official obesity chart categorizes elevated body weight into three progressive stages to assess cardiometabolic risk:
- Class 1 Obesity (BMI 30.0 – 34.9): Moderate elevation in health risk. Increased likelihood of developing type 2 diabetes and hypertension.
- Class 2 Obesity (BMI 35.0 – 39.9): Severe risk. Daily joint wear on hips and knees accelerates.
- Class 3 Obesity (BMI ≥ 40.0): Very severe / morbid obesity. Medical intervention and low-impact walking routines are strongly indicated.
Understanding Body Mass Intake & Energy Balance
Searches for body mass intake refer to the relationship between the caloric energy you consume and your metabolic maintenance burn. Maintaining a healthy body mass index requires aligning energy intake with energy expenditure. Walking 7,500 to 10,000 steps daily contributes 300 to 500 kcal of lean expenditure that keeps your BMI stable over decades.
If you are wondering how heavy you should be or are searching for an objective human weight scale or taking an informal am i fat quiz, our calculator provides grounded clinical science free of aesthetic commercial bias or perfect body me marketing claims. You can also explore age-graded guidelines using our bmi converter with age and the official cdc pediatric bmi calculator standards.
Frequently Asked Questions
Body mass index (BMI) is a standardized screening metric established by the World Health Organization (WHO) and Belgian mathematician Adolphe Quetelet. By dividing body weight in kilograms by height in meters squared (kg/m²), BMI estimates whether an adult's overall mass falls into underweight (< 18.5), normal healthy range (18.5 - 24.9), overweight (25.0 - 29.9), or obese (≥ 30.0) categories.
Use Your BMI to Calculate Walking Calorie Burn
Now that you know your BMI and weight in kilograms and pounds, discover exactly how many calories you burn walking at different speeds and inclines.