BMI Calculator: Body Mass Index Calculator
Calculate your Body Mass Index in kilograms, pounds, centimeters, inches, or feet and inches, then learn what the number means and what it cannot tell you.
Free BMI Calculator
For adults aged 20 and older. Your numbers stay in your browser.
Instant results
Get your BMI, category, and a visual scale in one click.
Metric and imperial
Use kg, lb, cm, inches, or feet and inches.
Private by design
Calculated in your browser. Nothing is sent anywhere.
What Is BMI?
Body Mass Index, commonly called BMI, relates body weight to height. For adults, it is used as a screening measure that places a person into standard categories. BMI is a useful quick reference, but it does not directly measure body fat, muscle mass, fat distribution, or overall health.
How to Calculate BMI
Imperial: BMI = 703 × weight (lb) ÷ height (in)²
For example, an adult weighing 70 kg and measuring 1.70 m has a BMI of about 24.2. The calculator above handles unit conversion automatically.
BMI Chart for Adults
For adults aged 20 and older, commonly used BMI categories are:
| BMI range | Adult category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 to less than 25 | Healthy weight |
| 25 to less than 30 | Overweight |
| 30 or higher | Obesity |
Accurate BMI Calculator: How to Get a Better Result
Reliable measurements matter. Measure height without shoes while standing upright, use a dependable scale, and select the correct units. If your weight or height changes, recalculate. A single BMI number is not a complete health assessment.
BMI Calculator for Women and Men
Searches such as BMI calculator women, BMI calculator female, BMI calculator men, BMI generator male, and BMI calculator for guys all refer to the same adult calculation. The standard formula does not change by sex. Pregnancy, body composition, age, and medical history can affect interpretation.
BMI Calculator by Age and Gender
Adult BMI is calculated from height and weight, while age and sex provide context. Children and teenagers are still growing, so their BMI is interpreted with age- and sex-specific BMI-for-age references. This calculator is intended for adults aged 20 and older. If you searched for a BMI calculator kg with age or a BMI calculator women age, enter your weight in kilograms and your age in the fields above; age is used as context, while the BMI itself comes from height and weight.
BMI Calculator KG and Feet
To use kilograms with feet, select kilograms for weight and feet plus inches for height. Enter the whole feet value and any additional inches; the calculator converts height before applying the standard formula.
Can BMI Help Estimate Ideal Weight?
There is no single ideal weight for everyone. Height can be used to calculate a reference range matching the adult healthy-BMI range, but a personal target depends on body composition, health history, nutrition, activity, and age.
Army BMI Calculator
Military organizations may use their own height, weight, body-composition, or fitness standards. BMIGenerator.com is a general educational tool and not an official military eligibility calculator. For service eligibility, use the current official requirements from the relevant organization.
What BMI Can and Cannot Tell You
BMI does not distinguish muscle from fat, measure body-fat percentage, or show where fat is stored. Two people with the same BMI can have different body compositions and health circumstances, so BMI is best treated as one piece of information.
Data, Privacy, and This Calculator
The BMI calculation runs locally in your browser and does not need an external API. The optional name field is not used in the calculation. See the Privacy Policy below for details on analytics, cookies, and advertising.
Popular BMI Searches
Jump straight to the calculator for whichever BMI tool you were looking for.
Frequently Asked Questions About BMI
What is a normal BMI?
For adults aged 20 and older, a BMI from 18.5 to less than 25 is the standard healthy-weight category.
What is the BMI formula?
Metric BMI is weight in kilograms divided by height in meters squared. With pounds and inches, BMI is 703 multiplied by weight in pounds divided by height in inches squared.
How to calculate BMI?
Measure your weight and height, select compatible units, apply the BMI formula, and compare the result with the adult category table.
How can I calculate my ideal weight?
There is no universal ideal weight. A height-based reference range can be calculated from the adult healthy-BMI range, but an individual target should consider personal health circumstances.
How to calculate BMI of body?
Use body weight and height. In metric units, divide kilograms by meters squared. In pounds and inches, multiply weight divided by height squared by 703.
How calculate the BMI?
Enter your age, weight, height, and measurement units in the calculator above, then select Calculate BMI.
How do you calculate BMI?
Use the standard formula for your measurement system and compare the result with the adult category table.
How do I calculate my BMI?
Enter your age, weight, and height above, select the correct units, and press Calculate BMI. The result is intended for adult screening.
How is BMI calculated?
BMI relates weight to height. The metric formula is kg/m², while the pounds-and-inches formula uses the 703 conversion factor.
How to calculate BMI for women?
For adult women, use the standard adult BMI formula. Pregnancy and some medical circumstances require individualized professional interpretation.
How to calculate your BMI?
Use an accurate height and weight, select the correct units, and calculate. For adults, the formula is the same regardless of sex.
How we calculate BMI?
The calculator converts the selected units, applies the standard formula, rounds the displayed result, and assigns the adult category.
How to use a BMI calculator?
Enter the requested measurements, select the weight and height units, and press Calculate BMI. Review the result as a screening estimate rather than a diagnosis.
Reviewed by Sana Imdad
Clinical nutritionist with experience counselling more than 600 clients, including pregnant and lactating mothers, and managing medical nutrition therapy (MNT) for PCOS, CKD, hypertension, cardiovascular disease, diabetes, and gastrointestinal conditions.
Experience
- Consultant Clinical Nutritionist, Ali Hospital, Fatehpur (2019 – present)
- Clinical Nutrition Training, Fatima Memorial Hospital, Lahore (Mar – Aug 2018): OPD counselling, ward rotations, CCU/ICU and surgical ward diet management
- Clinical Nutrition Training, National Hospital, Faisalabad (Oct 2015)
Education
- MS (Hons) Human Nutrition and Dietetics, University of Agriculture, Faisalabad (2019 – 2021)
- Human Nutrition & Dietetics, GC University, Faisalabad (2013 – 2017)
- F.Sc. Pre-Medical (2011 – 2013)
Certifications and training
- HACCP Model for Meat Industry (Pak Pure-Line)
- 11th CDNE Workshop on Nutrition in Wound Healing, Fatima Memorial Hospital (Aug 2018)
- Clinical Nutrition Internship, FMH NUR Foundation (2017)
- Community Mobilization Camp, FMH NUR Foundation (2017)
Skills
- Tailored diet planning and individual assessment
- Nutrition counselling and wellness coaching
- Weight-management programs
- Solving complex eating challenges
About BMIGenerator.com
BMIGenerator.com is an educational health-information website offering a simple BMI calculator and clear explanations of BMI, adult categories, formulas, units, and common questions. It works on desktop and mobile.
The website is not a hospital, clinic, government agency, or official military organization. Information is for general educational purposes and does not replace advice from a qualified healthcare professional.
Privacy Policy
Last updated: September 23, 2026
This policy explains how BMIGenerator.com handles information. BMI calculations are performed in your browser and do not require an external API.
Information you enter
Measurements are used by the page's JavaScript to calculate BMI. The optional name field is not required. No account is needed.
Cookies and analytics
The website may use cookies, analytics, or security tools if the site owner enables them. Such services may collect technical information such as browser type, device information, approximate location, and pages viewed, according to the provider's policies.
Advertising
If Google AdSense or another advertising service is enabled, third-party vendors may use cookies as permitted by their policies and applicable law. Consent settings may vary by location.
Children
This is an adult educational tool and is not designed to collect personal information from children.
Changes
This policy may be updated when features, analytics, advertising, or legal requirements change. The latest version appears on this page.
Terms of Use
Last updated: September 23, 2026
By using BMIGenerator.com, you agree to use the website for lawful informational purposes. The calculator and content are not a substitute for diagnosis, treatment, or professional medical advice.
Calculator information
Results depend on the accuracy of the height and weight entered. BMIGenerator.com does not guarantee that a displayed BMI is suitable for any medical, employment, insurance, military, or other eligibility decision.
External sources
The website may link to external sources, which have their own content, privacy practices, and terms.
Availability
We aim to keep the website available and accurate, but features or content may change without notice.
Contact BMIGenerator.com
For corrections, content questions, privacy requests, or feedback, use the official contact method provided by the site owner. Do not send confidential medical records, passwords, or payment details through a public contact channel.
Email: sanaimdad156@gmail.com
WhatsApp: +92 335 6842456