70 kg at 170 cm
- Category
- Healthy weight
- Healthy range
- 53.465 kg-71.961 kg
- Height
- 170 cm
BMI Calculator
Use this free BMI calculator to estimate adult body mass index, weight category, and a healthy BMI reference range from height and weight.
Estimate, not diagnosis Formula notes Example inputs Tab-only history
Formula steps
- Convert height from centimeters to meters.
- BMI = weight in kilograms / height in meters squared.
- Compare the result with adult BMI screening categories.
How to use the BMI Calculator
- Enter the requested measurements, dates, lab values, or workout details.
- Check that the units and formula assumptions match what the tool is asking for.
- Press the calculate button to see the answer, supporting metrics, and formula steps.
- Read the estimate with the health disclaimer in mind, then copy the result if you need it for notes.
What people use it for
Estimate adult BMI from metric height and weight.
Compare BMI with common adult screening categories.
Find the weight range that matches BMI 18.5 to 24.9 for a height.
Use a consistent estimate while tracking health or fitness changes.
Quick examples
Healthy range example
170 cm, 70 kgBMI about 24.2
Taller adult
183 cm, 82 kgBMI about 24.5
Smaller adult
160 cm, 52 kgBMI about 20.3
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the BMI Calculator See slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Health & Fitness Browse related calculators and utilities in the same category.
- Calculator and utility guides Find more guides that use real tool inputs and example numbers.
- All free tools Search every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about when to use the estimate, what the formula means, what it cannot decide for you, and how privacy works.
When should I use the BMI Calculator?
Use it for simple educational checks, trend tracking, or planning tasks like these: Estimate adult BMI from metric height and weight. Compare BMI with common adult screening categories. It can help you understand a number, but it cannot explain your whole health situation.
What do the main BMI Calculator inputs mean?
Enter adult height and weight in the units shown. BMI uses weight compared with height squared, so a small unit mistake can move the category. This page is for adult BMI screening only; children and teens use age-and-sex percentiles instead.
What is the BMI Calculator doing with my inputs?
In plain language: BMI is calculated as weight in kilograms divided by height in meters squared, then compared with adult BMI screening categories. Read the result together with the notes on the page, because health and fitness numbers often need personal context.
How should I read the BMI Calculator result?
Read BMI as a quick adult screening number. It can miss important context such as pregnancy, high muscle mass, waist size, body composition, age, medical history, and ethnicity. Use it as a clue, not a final health answer.
Can children, teens, pregnant people, or athletes use adult BMI the same way?
No. Children and teens need BMI percentiles, pregnancy changes body weight for a different reason, and athletes can have more muscle mass than BMI expects. In those cases, use BMI only as a rough note and ask a qualified professional for real guidance.
Can I use this as medical advice?
No. BMI is an educational adult screening estimate, not medical advice and not a diagnosis. Talk with a qualified health professional before making medical, pregnancy, nutrition, medication, or safety decisions. Use the calculator as a learning tool, then ask a qualified professional about decisions that affect care, pregnancy, medication, nutrition, or safety.
What should I double-check before trusting the result?
Check the units, date, and personal details before reading the answer. For example, pounds and kilograms, inches and centimeters, or a wrong activity level can change the result quickly. If the number feels surprising, rerun it slowly and compare it with the examples.
Does the site save my health inputs?
No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.