function breakdownDates(startDate, endDate) {
var start = new Date(startDate.getFullYear(), startDate.getMonth(), startDate.getDate());
var end = new Date(endDate.getFullYear(), endDate.getMonth(), endDate.getDate());
var years = end.getFullYear() - start.getFullYear();
var months = end.getMonth() - start.getMonth();
var days = end.getDate() - start.getDate();
if (days < 0) {
months -= 1;
var previousMonth = new Date(end.getFullYear(), end.getMonth(), 0).getDate();
days += previousMonth;
}
if (months < 0) {
years -= 1;
months += 12;
}
return { years: years, months: months, days: days };
}
window.WLTPostTools.mountRenderedTool({
root: "#wlt-tool-bmi-calculator",
slug: "bmi-calculator",
name: "BMI Calculator",
family: "number",
type: "tool",
implementation: implementation
});
}
start();
})();
[/wlt_inline_script]
Overview
About BMI Calculator
BMI Calculator is a browser-based number tool built for fast, no-sign-up workflows. With this page, you can calculate BMI from height and weight and review the standard category range in seconds, review the result immediately, and keep moving without switching tabs.
BMI Calculator is designed for quick checks, fast scenario testing, and simple decision support. Instead of opening a larger spreadsheet for every small question, you can change one input at a time, compare the numbers, and get a readable answer immediately on desktop or mobile.
How To Use
How to use BMI Calculator
The fastest way to use BMI Calculator is to enter your input, adjust only the settings you need, and run the main action once. After that, review the result panel, copy the output if necessary, and rerun the tool whenever you want to compare another version.
Choose whether you want to enter height and weight in metric or imperial units.
Fill in the current values as accurately as possible before running the calculation.
Review the BMI result, category label, and healthy-weight range estimate.
This page is a strong fit for visitors who need a quick answer more than a full spreadsheet model. It works especially well when the goal is to check a value, compare a few input combinations, or explain a number in plain language.
Adults checking a quick body mass index estimate during general planning.
Students and teachers using BMI examples in health or math activities.
Helpful Tips
How to get better results
Double-check units, percentages, and date formats before running the calculation because small input mistakes can change the result quickly.
If you are deciding between scenarios, rerun the tool with one changed input at a time so the difference is easier to understand.
Use the result panel as a quick planning aid, then move the final values into your document, quote, class note, or spreadsheet if needed.
FAQ
Common questions
No. BMI is a general screening metric and not a medical diagnosis.
Yes. The calculator supports both imperial and metric input styles.
