Health dashboard

BMI Calculator

BMI, metabolic rate, macros, and body composition — all in one place.

Height / Weight / Age

Body Mass Index

Use Asian public-health action points

Your BMI

Enter your height, weight and age to see your BMI

Select Height, Weight and Age above, enter each value, and press Confirm. Adult BMI in this tool supports ages 20–120.

Health information notice

For adults age 20 and older. BMI, body-fat, calorie, macro and ideal-weight results are screening and educational estimates, not a diagnosis or medical advice. Discuss health decisions with a qualified healthcare professional.

Methods and sources

Method names, assumptions, limits and original-source titles are listed in English for auditability.

General use limits

For adults only; do not use during pregnancy or breastfeeding.
Screening and planning estimates only; not diagnostic, medical advice, or personalized care.

Adult AMDR reference ranges: carbohydrate 45–65%, protein 10–35%, and fat 20–35%.

Adult BMI and WHO Asian action points

cdc-adult-categories-2026-07

Intended population: Adults age 20 and older

Screening measure only; not a diagnosis or a direct measure of body fat.
Standard adult categories remain unchanged when Asian action-point markers are shown.

Reviewed 2026-10-31; next review due 2027-01-31.

Resting energy and activity assumptions

mifflin-1990-roza-shizgal-1984

Intended population: Adults age 20 through 78 who are not pregnant or breastfeeding

These equations estimate resting energy expenditure and carry individual uncertainty.
Activity multipliers are product assumptions: sedentary 1.2, light 1.375, moderate 1.55, very active 1.725, and extra active 1.9.
For adults only; do not use during pregnancy or breastfeeding.
Screening and planning estimates only; not diagnostic, medical advice, or personalized care.

Reviewed 2026-10-31; next review due 2027-01-31.

Macro distribution and calorie safety

app-template-ratios-2026-07

Intended population: Adults using an otherwise valid daily energy estimate

Adult AMDR reference ranges are carbohydrate 45-65%, protein 10-35%, and fat 20-35%.
Named presets may fall outside AMDR; they are selectable templates, not recommendations.
Daily energy is based on the Mifflin-St Jeor estimate and the selected activity multiplier.
Goal templates apply fixed product assumptions: lose 500 kcal/day, maintain 0, and gain 300 kcal/day.
Targets below 1,000 kcal are unavailable.
For adults only; do not use during pregnancy or breastfeeding.
Screening and planning estimates only; not diagnostic, medical advice, or personalized care.

Reviewed 2026-10-31; next review due 2027-01-31.

Legacy circumference body-fat estimate

hodgdon-beckett-1984

Intended population: Adults with measurements taken at the specified circumference landmarks

Legacy circumference estimate; not the current U.S. Navy BCA and not a direct measurement.
No clinical body-fat category is assigned.

Reviewed 2026-10-31; next review due 2027-01-31.

Adult waist-to-height screening reference

nice-ng246-2026-01

Intended population: Adults with BMI below 35 kg/m², used alongside BMI

Screening reference only; not a diagnosis or a personal weight target.
NICE classifies 0.4 to 0.49 as healthy central adiposity, 0.5 to 0.59 as increased, and 0.6 or more as high.
Do not interpret for adult BMI 35 kg/m² or above, pregnancy, an eating disorder, or a condition that affects height.
Measure midway between the lowest rib and top of the hip after breathing out naturally; use the same units as height.

Reviewed 2026-10-31; next review due 2027-01-31.

Legacy “ideal weight” comparison

hamwi-devine-robinson-miller-lb-conversion-2026-10

Intended population: Adults at least 152.4 cm tall

Legacy formula comparison; values are not personal weight targets.
Formula results are unavailable below five feet.

Reviewed 2026-10-31; next review due 2027-01-31.

How to calculate your BMI

Open BMI Calculator

Go to bmi-calculator.hanoon.app in your browser.
Enter your measurements

Use the Height, Weight and Age buttons above to enter your measurements and age (20–120), then press Confirm for each input. You can choose metric (cm/kg) or imperial (ft-in/lbs) units.
View your results

Valid inputs show your BMI result and category. In the Energy and Body tabs, enter the additional information needed for each calculation to view other metrics.

Frequently asked questions

What is BMI?

BMI is weight in kilograms divided by height in metres squared: BMI = kg ÷ m². At 70 kg and 175 cm, 70 ÷ 1.75² = 22.9 after rounding to one decimal place. It is a screening measure, not a direct measurement of body fat.

What is a healthy BMI range?

For adults aged 20 and older, this calculator uses CDC categories: below 18.5 underweight; 18.5 to below 25 healthy range; 25 to below 30 overweight; 30 or above obesity, including class 3 (severe obesity) at 40 or above. It classifies the displayed BMI rounded to one decimal place. Asian mode adds the WHO consultation action points 23, 27.5, 32.5 and 37.5; these markers do not replace the standard categories.

Is my data stored or sent to a server?

Calculations stay in your browser. Analytics may record page and interaction events, but the masked calculator prevents entered health values from being recorded.

What is TDEE?

Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a day, including your basal metabolic rate (BMR) plus calories burned through physical activity.