Online BMI Calculator for Calculating Body Mass Index

Body Mass Index (BMI) Calculator Sign

This online BMI calculator will help you to calculate your body mass index.

What is Body Mass Index?

Body mass index (BMI), which is based on height and weight, is a simple estimate of body fat that is a good indicator of your risk for certain diseases such as heart disease, high blood pressure, type 2 diabetes, gallstones, breathing problems, and certain cancers.

Body mass index calculations are often used to determine whether a person is overweight, obese, underweight, or normal (see the BMI body mass index chart in the calculated results). It is designed for males and females from age 18 to age 65 but does have its limitations.

Please also note that BMI tends to overestimate body fat for athletes and bodybuilders, and tends to understate body fat for older people who have lost muscle mass.

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Body Mass Index (BMI) Calculator

Calculate your body mass index using your height and weight, in either standard or metric measurements.

Special Instructions

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Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Measure:Measurement:Measurement preference:Measurement preference:

Measurement preference:

Select either standard (inches) or metric (centimeters).

Hgt inches:Height inches:Height in inches:Height in inches:
Convert x'x" to Inches
Feet
Inches
= inches

Your height:

Enter your height (without shoes on) in your selected unit of measurement. Inches for standard and centimeters for metric. Use the decimal equivalents for fractions (for 1/4 enter .25, for 1/2 enter .5, for 3/4 enter .75).

If you need to convert feet and inches to inches, expand the description to reveal a mini feet-to-inches conversion calculator.

Wgt lbs:Weight lbs:Weight in pounds:Weight in pounds:

Your weight:

Enter your weight in your chosen unit of measurement. Pounds for standard and kilograms for metric.

BMI:Body Mass Index:Body Mass Index:Body Mass Index:

Your Body Mass Index:

Based on your height and weight entries, this is your calculated Body Mass Index (BMI).

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

Help and Tools

Adjust Calculator Width:

Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".

Show/Hide Popup Keypads:

Select Show or Hide to show or hide the popup keypad icons located next to numeric entry fields. These are generally only needed for mobile devices that don't have decimal points in their numeric keypads. So if you are on a desktop, you may find the calculator to be more user-friendly and less cluttered without them.

Stick/Unstick Tools:

Select Stick or Unstick to stick or unstick the help and tools panel. Selecting "Stick" will keep the panel in view while scrolling the calculator vertically. If you find that annoying, select "Unstick" to keep the panel in a stationary position.

If the tools panel becomes "Unstuck" on its own, try clicking "Unstick" and then "Stick" to re-stick the panel.