BMI and calorie calculator

Calculate your body mass index and estimate how many calories you use each day. For adults 18 and over.

Your details

Result

Your BMI
Category

Healthy range for your height:

Resting energy (BMR)
Maintain weight
Gradual loss (−250)
Steady loss (−500)
Gradual gain (+250)

This tool gives general estimates, not medical advice. If you have a health condition, are pregnant, or want to change your weight significantly, talk to a doctor or dietitian.

BMI and Calorie Calculator: Check Your BMI and Daily Calorie Needs

Many people want a quick way to see where they stand on body mass index and roughly how many calories they use each day. A BMI calculator gives a simple screening number, and a calorie calculator estimates your daily energy needs. This free tool does both for adults, in metric or imperial units.

Why you need a BMI and calorie calculator

  • You want a quick health check without visiting a clinic.
  • You’re not sure how many calories you burn each day.
  • Online calculators ask for email addresses before showing results.
  • Conflicting advice makes it hard to know what a healthy weight range looks like.

Common problems when looking for a BMI and calorie calculator

  • Many calculators give a number but no context about what it means.
  • Some push supplements or programs along with the results.
  • Imperial and metric conversions are a hassle.
  • BMI has limitations that few tools explain.
  • Calorie targets can be extreme or unsafe on some sites.

How this free BMI and calorie calculator solves the problem

  • Calculates BMI and shows your category and a healthy weight range for your height.
  • Estimates resting energy use (BMR) and daily calories for your activity level.
  • Switch between metric and imperial units.
  • Shows moderate calorie targets only, and does not suggest very low intakes.
  • No sign-up, no stored data, and a clear reminder that results are estimates.

Do’s and don’ts of using a BMI and calorie calculator

Do

  • Use accurate, recent measurements.
  • Treat results as a starting point, not a diagnosis.
  • Talk to a doctor or dietitian before making big changes to your diet.
  • Consider waist size, fitness and health history alongside BMI.

Don’t

  • Don’t use BMI for children and teens. They need growth charts.
  • Don’t rely on BMI alone if you’re very muscular, pregnant or elderly.
  • Don’t eat far below recommended minimums without medical supervision.
  • Don’t compare yourself to others based on one number.

Tips for understanding BMI and daily calories

  • Aim for gradual changes, since small steady habits are easier to keep.
  • Remember that some health bodies use lower BMI cut-offs for Asian populations.
  • Recalculate after major changes in weight or activity.
  • Pair calorie awareness with good sleep, movement and balanced meals.
  • If you have a health condition, ask your healthcare provider for personal targets.

Frequently asked questions

What is BMI?

Body mass index is your weight divided by your height squared. It is a quick screening number, not a diagnosis.

Is BMI accurate for everyone?

No. It does not separate muscle from fat, and it can be misleading for athletes, older adults and some ethnic groups. Several Asian health bodies use lower cut-offs, for example 23 for overweight.

How are calories estimated?

The Mifflin-St Jeor equation estimates your resting energy use, which is then multiplied by an activity factor. Real needs vary from person to person.

How to use the BMI and calorie calculator

  1. Choose metric or imperial units.
  2. Enter your sex, age, height and weight, and pick your activity level.
  3. Read your BMI, healthy weight range and daily calorie estimate.
  4. Use the numbers as a starting point, not a prescription.

More free tools

Unit Converter

Convert length, weight, temperature, volume, area, speed, data size and time.

Color Converter

Convert colors between HEX, RGB and HSL, check contrast and pick shades.

WhatsApp Link Generator

Create a wa.me chat link and QR code with a pre-filled message. No need to save the number first.

QR Code Generator with Logo

Design QR codes with your colors, shapes and logo. Download as PNG, JPG or SVG.

Barcode Generator

Create barcodes (Code 128, EAN, UPC, Code 39) with custom colors. Download PNG or SVG.

Invoice Generator

Make a clean PDF invoice with your logo, hourly or item billing, tax and discounts.