Is this BMI calculator safe from spying?

Yes. Unlike some mobile apps where amazon fire stick users warned about spying bmi calculator app risks exist, this web tool processes everything locally in your browser. Your data is 100% confidential and secure.

Does this include reverse BMI calculation?

Yes. When you enter your height, the tool automatically performs a reverse calculation to display your specific 'Healthy Weight Range' telling you exactly what you should weigh for a normal BMI.

How do you calculate BMI percentile for kids?

For children and teens, BMI is age-and-gender specific. It is calculated as a percentile relative to other children of the same sex and age, rather than fixed numbers used for adults.

How do I use this as a BMI calculator for amputee?

To use this as a bmi calculator for amputee users, you must estimate your weight without the amputation. Generally, estimated segmental body weights (e.g., hand = 0.7%, foot = 1.5%, entire leg = 16%) are added back to the current weight to get an estimated total body weight for the standard formula.

BMI Calculator: Check Your Body Mass Index

Get a clear snapshot of your health. Use our lifetime free, unlimited, and secure tool to calculate BMI, reverse calculate your healthy weight range, and find logic for a bmi amputation calculator.

Height (cm)

Weight (kg)

Fast, Free, Private & Best BMI Calculator

Instantly check your Body Mass Index (BMI) with metric or imperial units. This tool is Top, Fast, Best, and Lifetime Free Unlimited. Your information is 100% confidential and secure because all processing is done locally in your browser no data is sent to any server.

Why Use a Browser Calculator vs. Apps?

Recently, amazon fire stick users warned about spying bmi calculator app and other untrusted downloads have raised privacy concerns. Many free apps secretly collect health data.

Our tool is different. It runs 100% in your browser. We cannot see your data, we do not track your weight, and we strictly respect your privacy. It is the safest way to calculate BMI.

Why people love this tool

Reverse BMI Calculator

Don't just get a number. Use our built-in reverse bmi calculator feature (Healthy Weight Range) to see exactly what you should weigh based on your height.

Metric & Imperial

Use kg/cm or lb/ft/in. Automatic conversions and accurate results instantly.

100% Confidential

No uploads, no tracking. Everything runs locally on your device. Safe from spying apps.

Amputee Friendly

See our section below on the bmi calculator for amputee formula to ensure you get an accurate result.

Free & Unlimited

Lifetime free access with no signups, no paywalls, and no limits.

Mobile Friendly

Optimized for Chrome, Safari, and all mobile browsers without installing risky apps.

Specialized BMI Calculations

BMI Calculator for Amputee & Limb Loss

Standard formulas do not account for missing limbs. Calculating bmi for amputees requires a specific formula adjustment. If you need a bmi calculator amputation method, follow these steps:

BMI Amputee Calculator Method:

Step 1: Determine the percentage of total body weight contributed by the missing limb (e.g., Foot: 1.5%, Below Knee: 5.9%, Entire Leg: 16%).
Step 2: Calculate estimated weight = Current Weight / (1 - % of missing limb).
Step 3: Enter this "estimated weight" into the bmi calculator amputee tool above.

This essentially acts as a bmi amputation calculator by normalizing your weight against your height.

Kids BMI Calculator & Percentiles

For children and teens (ages 2-19), standard BMI categories do not apply directly. Instead, you must ask: how do you calculate bmi percentile?

Children's BMI is compared against growth charts:

Underweight: Less than the 5th percentile.
Healthy Weight: 5th percentile to less than the 85th percentile.
Overweight: 85th to less than the 95th percentile.
Obese: Equal to or greater than the 95th percentile.

Note: The tool above calculates adult BMI. For kids, consult a pediatrician for exact percentile plotting.

What is BMI?

BMI (Body Mass Index) is a screening measure that estimates body fat based on height and weight. It helps identify potential health risks related to weight.

BMI formula

Metric: BMI = weight (kg) / [height (m)]²
Imperial: BMI = 703 × weight (lb) / [height (in)]²

Adult BMI categories

Underweight: < 18.5
Healthy weight: 18.5–24.9
Overweight: 25–29.9
Obesity: ≥ 30

How to calculate your BMI

Select Metric (kg/cm) or Imperial (lb/ft/in).
Enter your height and weight (if calculate bmi for amputee, enter estimated total body weight).
Click “Calculate BMI” to see your BMI, category, and healthy weight range (reverse BMI).

Global Availability (GEO)

Our tool is optimized for global use. Whether you are in the USA, UK, Canada, Australia, or India, you can perform a bmi reverse calculation or standard check instantly. We support users across the EU (Germany, France, Spain), Asia (Japan, South Korea, Singapore, Philippines), and Latin America. If you have internet access, this lifetime free tool works for you.

Frequently Asked Questions (AEO)

Is it private and secure?

Yes. All calculations happen in your browser. Your data never leaves your device. This makes it safer than installing unknown apps.

Is there a BMI calculator for amputee users?

Yes, but it requires a manual step. Calculating bmi for amputees involves adding the estimated missing limb weight back to your current weight. Once adjusted, this tool works as a bmi calculator amputation guide.

What is a good BMI?

For most adults, healthy weight is BMI 18.5–24.9. If you are outside this range, check the "Healthy Weight Range" result (reverse BMI) to see your target.

How do you calculate BMI percentile?

BMI percentile is calculated for children/teens by comparing their BMI against growth charts of the same age and gender. It is not a flat number like adult BMI.

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