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Body Surface Area Calculator

Use this body surface area calculator to review an educational health calculation for body surface area.

Primary answer
Mosteller BSA
Inputs to verify
Age, Height, and Height unit
Use type
Use as a review-only estimate; verify before relying on it.
Keyword intent
body surface area calculator

Calculator

Body Surface Area Calculator

Calculates mosteller bsa from age, height, height unit. Defaults are filled in so you can review a working example before changing inputs.

years

Adult-only educational estimate; not for pediatric, dosing, burn, oncology, or clinical protocol use.

Use centimeters when height unit is cm, or total inches when height unit is in.

Choose centimeters or inches.

Use kilograms when weight unit is kg, or pounds when weight unit is lb.

Choose kilograms or pounds.

Result

Result reflects the current submitted inputs.

  • Risk C
  • Reviewed 2026-05-26
  • 3 sources
Mosteller BSA1.818 m2
Du Bois BSA1.81 m2
Haycock BSA1.826 m2
Clinical use noteAdult educational BSA estimate only; do not use for medication dosing, chemotherapy, burn fluids, or clinical decisions.

Breakdown

Weight used
70 kg
Height used
170 cm
  • This calculator is for adult educational formula comparison only and is not medical advice.
  • Do not use these outputs to dose medications, chemotherapy, burn fluids, or any clinical protocol.
  • Mosteller is shown as the primary result; Du Bois and Haycock are included to show formula variability.
  • Metric and imperial inputs are normalized before calculation.
  • No intermediate rounding is applied; display output rounds to three decimals.

Accuracy notes

Risk level
C
Reviewed
2026-05-26
Sources
3
Primary result
Mosteller BSA

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

High-risk estimate

Educational estimate, not advice

This health calculator is for educational estimates only. It does not diagnose, treat, provide medical clearance, or replace advice from a qualified health professional.

Check the reviewed sources, assumptions, and formula limits before using this result for a financial, health, or safety decision.

Review cadence: 12 months; next review due 2027-05-26.

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What the result means

Mosteller BSA is the number to carry forward from this body surface area calculation. Mosteller body surface area estimate. Treat the result as educational context, then read the limitations and assumptions before discussing it with a professional. Use du bois BSA, haycock BSA, and clinical use note to explain why mosteller BSA moved when an input changed. Record the inputs you used and verify any health concern with a qualified professional.

Mosteller BSAMosteller body surface area estimate.
Du Bois BSADu Bois and Du Bois body surface area estimate.
Haycock BSAHaycock body surface area estimate.
Clinical use noteVisible no-dosing and no-clinical-decision disclaimer.

Use the result this way

  1. Start with Mosteller BSA, then use supporting outputs only to explain the primary answer.
  2. Verify age, height, and height unit before copying the result.
  3. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.
  4. Record the inputs you used and verify any health concern with a qualified professional.

User job

How to use this calculator

Use Body Surface Area Calculator when you need mosteller bsa, then use du bois bsa and haycock bsa to check the context for general wellness education and preparing for a professional conversation.

Best for

  • Understanding a formula-based estimate
  • Seeing which inputs drive a health-related output
  • Reviewing a default example before entering your own age and height.

Check before relying

  • Health formulas can be population-specific; do not use the result as diagnosis or treatment advice.
  • This calculator is for adult educational formula comparison only and is not medical advice.
  • Do not use these outputs to dose medications, chemotherapy, burn fluids, or any clinical protocol.
  • Source context: StatPearls / NCBI Bookshelf, reviewed 2026-05-26.

Next useful step

Limits of this estimate

  • Supports formula comparison only; it must not be used for medication dosing, chemotherapy, burn-fluid decisions, clinical protocol selection, or individualized medical care.
  • The result depends on user-entered inputs and the documented assumptions; defaults are examples only.
  • Search indexing approval does not downgrade this page from risk level C or turn the result into professional advice.

Formula

Body surface area is estimated from normalized height in centimeters and weight in kilograms using Mosteller, Du Bois, and Haycock formulas. Key assumptions: This calculator is for adult educational formula comparison only and is not medical advice. Do not use these outputs to dose medications, chemotherapy, burn fluids, or any clinical protocol. Mosteller is shown as the primary result; Du Bois and Haycock are included to show formula variability.

  • Body surface area is estimated from normalized height in centimeters and weight in kilograms using Mosteller, Du Bois, and Haycock formulas.
  • This calculator is for adult educational formula comparison only and is not medical advice.
  • Do not use these outputs to dose medications, chemotherapy, burn fluids, or any clinical protocol.
  • Primary source context: StatPearls / NCBI Bookshelf.

Inputs

Enter age, height, height unit, and weight for general wellness education and preparation for a professional conversation. Before calculating, choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges. Age: Adult-only educational estimate; not for pediatric, dosing, burn, oncology, or clinical protocol use. Height: Use centimeters when height unit is cm, or total inches when height unit is in. Height unit: Choose centimeters or inches. Weight: Use kilograms when weight unit is kg, or pounds when weight unit is lb.

AgeAdult-only educational estimate; not for pediatric, dosing, burn, oncology, or clinical protocol use.
HeightUse centimeters when height unit is cm, or total inches when height unit is in.
Height unitChoose centimeters or inches.
WeightUse kilograms when weight unit is kg, or pounds when weight unit is lb.
Weight unitChoose kilograms or pounds.

Example

Using the default inputs, Body Surface Area Calculator returns mosteller BSA of 1.818 m2. Adjust age, height, height unit, and weight to match your own scenario.

FAQ

How is mosteller BSA calculated here?

Body surface area is estimated from normalized height in centimeters and weight in kilograms using Mosteller, Du Bois, and Haycock formulas. The first assumption to check is: This calculator is for adult educational formula comparison only and is not medical advice.

What does Mosteller BSA mean for body surface area?

Treat the result as educational context, then read the limitations and assumptions before discussing it with a professional. Secondary values such as du bois BSA, haycock BSA, and clinical use note are there to explain the primary answer, not to replace it.

What should I enter for Age?

Adult-only educational estimate; not for pediatric, dosing, burn, oncology, or clinical protocol use. Use years for this field. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.

How does Height change mosteller BSA?

Use centimeters when height unit is cm, or total inches when height unit is in. Changing it can alter mosteller BSA because the formula uses the submitted inputs together. Also compare measurement method, formula population, age range, units, sex or activity assumptions, and clinical context.

Why does the body surface area example show 1.818 m2 for mosteller BSA?

The default inputs produce 1.818 m2 for mosteller BSA. Treat that as a format and scale check, then replace every default value with your own inputs.

Can the body surface area result diagnose or prescribe anything?

No. Use it as educational context only. Health formulas can depend on population, measurement method, age range, and clinical context.

Sources

Last reviewed: 2026-05-26

  • officialReviewed 2026-05-26 · Source 2025-02-06
    Body Surface AreaStatPearls / NCBI Bookshelf. Implemented BSA formulas, high-risk classification, and no-dosing disclaimer.
    Scope
    Clinical overview of BSA, formula variability, Du Bois, Mosteller, Haycock, and dosing-related risks.
    Supports
    Implemented BSA formulas, high-risk classification, and no-dosing disclaimer.
    Limits
    Supports formula comparison only; it must not be used for medication dosing, chemotherapy, burn-fluid decisions, clinical protocol selection, or individualized medical care.
  • officialReviewed 2026-05-26 · Source 1987
    Simplified calculation of body-surface areaNew England Journal of Medicine / PubMed. Mosteller formula selection and primary BSA output.
    Scope
    Mosteller simplified body surface area calculation.
    Supports
    Mosteller formula selection and primary BSA output.
    Limits
    Supports formula comparison only; it must not be used for medication dosing, chemotherapy, burn-fluid decisions, clinical protocol selection, or individualized medical care.
  • officialReviewed 2026-05-26 · Source 2016
    Body surface area formulae: an alarming ambiguityScientific Reports / PubMed Central. Formula comparison output and visible warning that BSA estimates can differ materially by formula.
    Scope
    Discussion of BSA formula variation and clinical implications.
    Supports
    Formula comparison output and visible warning that BSA estimates can differ materially by formula.
    Limits
    Supports formula comparison only; it must not be used for medication dosing, chemotherapy, burn-fluid decisions, clinical protocol selection, or individualized medical care.

Disclaimer

This health calculator is for educational estimates only. It does not diagnose, treat, provide medical clearance, or replace advice from a qualified health professional.