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Body Surface Area

Body Surface Area is part of Toolspire and is ready as soon as this page loads. Height is centimetres and weight is kilograms. This is a sketch used in dosing references. It is not a dose and not a diagnosis.

Runs in this tabFreeNo account

On this page

What you can do here

Centimetres and kilograms

The 3600 belongs to those units.

The 170/70 check

You can recompute the square root from 3.3056.

No dose

A paper that says mg per m² still needs a clinician. This page stops at m².

The sequence

How to use the Body Surface Area

  1. 1

    Type centimetres and kilograms

    170 and 70 are the sample.

  2. 2

    Read about 1.8181

    That is the square root of 3.3056.

  3. 3

    Do not convert the m² into a tablet count

    The page has no drug in it.

Worth knowing

  • Body Surface Area on Toolspire: mosteller BSA = √(height cm × weight kg / 3600).
  • 170 cm and 70 kg is √(11900 / 3600), about 1.8181 m².
  • The units are required. Inches and pounds are a different constant.
  • The result is a surface estimate, not a prescription.

One square-root estimate

Mosteller’s formula estimates body surface area as the square root of height in centimetres times weight in kilograms, divided by 3600. For 170 and 70 the fraction is 3.30555… and the root is about 1.8181 square metres. Other formulas, such as Du Bois, use different exponents. This page is only Mosteller, and it is not an instruction to dose a medicine.

FAQ

Questions about Body Surface Area

Where does Body Surface Area run?

Body Surface Area runs in this tab on Toolspire. What you type or drop in is not sent to us and is not stored on a server.

What is the Mosteller BSA for 170 cm and 70 kg?

About 1.8181 m².

What units does the formula want?

Centimetres and kilograms. The 3600 is for that pair.

Is this a medicine dose?

No. It is a surface estimate.

Why might another calculator differ?

It may be using Du Bois or another formula, or inches and pounds.

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