body surface area calculadora — the short version

We built Body Surface Area calculadora because the other tools for this job either cost a subscription or came with a consent banner the size of a small novel.

A number is a prompt to talk to your GP, not a diagnosis. Rest 5 minutes before taking the reading — then work out the number and the rest of this page explains what the answer means.

Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

The formula we run is Mosteller: BSA (m²) = √((height_cm × weight_kg) / 3600). You'll see each term laid out in the worked example below.

A worked example, step by step

Consider a realistic scenario and follow it through:

Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

Every run comes back to Mosteller: BSA (m²) = √((height_cm × weight_kg) / 3600) — change the inputs, the structure of the answer stays.

Moments this tool earns its keep

Body Surface Area calculadora is aimed at people arriving with questions like these:

"Du bois formula"
"Mosteller formula"
"Bsa dosing"
"Body surface area pediatric"
"What is body surface area"
"How to calculate body surface area"

Where the number stops being useful

Every tool has an edge where it stops being the right answer. Body Surface Area calculadora is no exception:

For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
For very large or very small extremes the rounding error outgrows the useful precision.
When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.

Five things that trip everyone up

Every time you work out the number for a new scenario, one of these creeps in — it's worth knowing them ahead of time.

Assuming the UK and US versions of the same unit are interchangeable — they're not.
Typing a comma where the tool expects a dot (or vice versa).
Rounding early — particularly painful in percentages and compound growth.
Ignoring the time window: a 'per year' answer makes no sense with a monthly input.
Treating the answer as private: screenshots are fine, but the URL always reruns cleanly.

The sources behind the numbers

Where the maths needs an external authority, we cross-check against:

NHS
BNF (British National Formulary)

Works well alongside

If this question keeps coming up for you, the same cluster of tools usually comes next:

BMI calculadora — Check your Body Mass Index in metric or imperial, with NHS weight categories explained.
Ideal Weight calculadora — Estimate a healthy weight range from height using Devine, Robinson, Miller and Hamwi formulas.

How we keep this accurate

Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.

Found an out-of-date number on Body Surface Area calculadora or anywhere else in the Health toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.

Frequently asked questions

Du bois formula?

In one line: feed the figures into the Body Surface Area calculadora widget and it'll show the working. Compute body surface area (BSA) using the Du Bois and Mosteller formulas — commonly used for chemotherapy dosing and paediatric medicine. Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

Mosteller formula?

Put simply, the underlying formula is **Mosteller: BSA (m²) = √((height_cm × weight_kg) / 3600)**. Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

Bsa dosing?

Short answer: this question usually arrives alongside BMI calculadora, Ideal Weight calculadora. The Body Surface Area calculadora handles the specific case above; the others cover adjacent ground.

Body surface area pediatric?

Quick version: every figure is cross-checked against NHS and the wider data. If you notice a stale rate, email the editorial desk and we'll patch it in under 24 hours.

What is body surface area?

Practically speaking, yes, everything runs in your browser. No inputs are sent to our servers or any third party, nothing is logged and nothing persists after you close the tab.

How to calculate body surface area?

Here's the plain-English summary: Body Surface Area calculadora is free to use, free to share and free to embed — pass the URL around a class, a slack channel or a family chat. The editorial policy covers attribution.

Body surface area formula?

In one line: the short method: write the inputs in the units shown, run the calculation, then sense-check the answer against an order-of-magnitude estimate in your head.

Body surface area example?

Put simply, if the result surprises you, run it a second time with slightly different inputs — small swings often reveal a unit or rounding issue in the original figures.

Body surface area worked example?

Short answer: a calculadora is a sanity check, not a verdict. For anything legally binding — contracts, tax filings, medical decisions — bring the figure to a qualified professional as a starting point.

Body surface area explained?

Quick version: Compute body surface area (BSA) using the Du Bois and Mosteller formulas — commonly used for chemotherapy dosing and paediatric medicine. The page walks through the method in full so you can answer follow-up questions without guessing.

Body surface area definition?

Practically speaking, open the Body Surface Area calculadora widget at the top of the page. Compute body surface area (BSA) using the Du Bois and Mosteller formulas — commonly used for chemotherapy dosing and paediatric medicine. Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

Body surface area meaning?

Here's the plain-English summary: open the Body Surface Area calculadora widget at the top of the page. Compute body surface area (BSA) using the Du Bois and Mosteller formulas — commonly used for chemotherapy dosing and paediatric medicine. Used clinically for chemotherapy dosing and burns assessment. Adults typically fall between 1.6 m² and 2.2 m². The Du Bois formula is an alternative for shorter patients.

Body Surface Area calculadora