BMI Calculator
Enter your height and weight to check your Body Mass Index instantly — then see which blood tests make sense at your BMI.
What Is BMI?
Body Mass Index (BMI) is a simple number calculated from your height and weight. Doctors use it worldwide as a first-level screening tool for weight-related health risks. It does not measure body fat directly, but for most adults it tracks closely enough to flag when further testing is worth doing.
BMI Categories
- Below 18.5 — Underweight. Worth checking iron, B12, vitamin D and thyroid.
- 18.5 – 24.9 — Healthy range. Keep the annual checkup habit.
- 25 – 29.9 — Overweight. Time for blood sugar, HbA1c and lipid profile.
- 30 and above — Obese. Add liver function, kidney function and thyroid to the panel.
BMI Is a Starting Point, Not a Diagnosis
Two people with the same BMI can have very different health profiles. Blood tests reveal what the number cannot: sugar control, cholesterol, liver fat, thyroid function. If your BMI sits outside the healthy range, the tests above give you and your doctor something concrete to act on — instead of guessing.
Frequently Asked Questions
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered healthy for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese. These are screening ranges — your doctor interprets them alongside other health markers.
Is BMI accurate for everyone?
BMI is a useful screening tool but not a full health picture. Athletes with high muscle mass, pregnant women, and older adults with low muscle may get misleading readings. Blood tests like lipid profile, blood sugar, and HbA1c give the fuller story.
My BMI is high. Which blood tests should I take?
Start with fasting blood sugar + HbA1c (diabetes risk), lipid profile (cholesterol), liver function test (fatty liver), and thyroid (TSH). These are the tests doctors most commonly recommend alongside a high BMI reading.
Can I get these tests done at home in Lucknow?
Yes. Dr. Lal PathLabs Patient Service Centre, Khargapur offers free home sample collection across Gomti Nagar and Lucknow. Call or WhatsApp +91 9451155402 to book.
Need Help Booking a Test?
Our team is ready to assist you. Free home sample collection available across Lucknow.