170 cm, 70 kg
- Mosteller
- 1.82 m2
- Du Bois
- 1.81 m2
- Formula input
- height and weight
Do not use this page for medication dosing, chemotherapy, burn, surgery, kidney, pediatric, veterinary, or treatment decisions.
Body Surface Area Calculator
Use this free body surface area calculator to estimate adult BSA in square meters from height and weight, with Mosteller and Du Bois formula results.
Estimate, not diagnosis Formula notes Example inputs Tab-only history
Formula steps
- Mosteller BSA = square root of (height in cm times weight in kg divided by 3600).
- Du Bois BSA = 0.007184 x height^0.725 x weight^0.425.
- Both formulas are rounded to two decimals here because BSA is an estimate, not an exact body measurement.
How to use the Body Surface Area 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 BSA from height and weight.
Compare Mosteller and Du Bois formula results.
Check why two BSA formulas can differ slightly.
Keep dosing and treatment decisions with a qualified clinician.
Quick examples
Average adult
170 cm, 70 kgMosteller 1.82 m2; Du Bois 1.81 m2
Taller adult
180 cm, 85 kgMosteller 2.06 m2; Du Bois 2.05 m2
Smaller adult
160 cm, 55 kgMosteller 1.56 m2; Du Bois 1.56 m2
Small adult
150 cm, 45 kgMosteller 1.37 m2; Du Bois 1.37 m2
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 Body Surface Area 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 Body Surface Area Calculator?
Use it for simple educational checks, trend tracking, or planning tasks like these: Estimate adult BSA from height and weight. Compare Mosteller and Du Bois formula results. It can help you understand a number, but it cannot explain your whole health situation.
What do the main Body Surface Area Calculator inputs mean?
Enter height in centimeters and weight in kilograms. The calculator uses those two measured values for adult human body surface area formulas. It does not ask for age, sex, body fat, diagnosis, procedure type, burn percentage, or medication details.
What is the Body Surface Area Calculator doing with my inputs?
In plain language: Mosteller BSA = square root of (height in cm times weight in kg divided by 3600). Du Bois BSA = 0.007184 x height^0.725 x weight^0.425. Both results are shown in square meters. Read the result together with the notes on the page, because health and fitness numbers often need personal context.
How should I read the Body Surface Area Calculator result?
Read BSA as an estimated body surface area in square meters. The Mosteller and Du Bois lines can differ slightly because they are different formulas. Use the number as clinical math context only, not as a medication dose, diagnosis, burn estimate, or treatment plan.
What is the difference between Mosteller and Du Bois BSA?
Mosteller is a simple square-root formula using height and weight. Du Bois uses height and weight with exponents. They usually stay close for ordinary adult inputs, but they are not identical, so this calculator shows both instead of pretending one estimate is perfect.
Can this calculator handle children, burns, pets, or procedure-specific formulas?
No. This page is a simple adult human height-and-weight BSA reference. It is not a pediatric, neonatal, burn, veterinary, psoriasis, chemotherapy, surgery, or Schnur-scale calculator.
Why is BSA shown in square meters?
Body surface area formulas usually report square meters, written here as m2. That unit is different from BMI, body fat percentage, or body weight, so do not compare the number as if it were one of those results.
Can I use this as medical advice?
No. BSA is an educational clinical-math estimate, not medical advice, not a medication dose, and not a treatment plan. Ask a qualified clinician before using BSA for care, dosing, burns, surgery, chemotherapy, kidney equations, or other medical 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.