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Calculate BSA for dialysis and drug dosing. Updated 2026-07.
Calculate BSA for dialysis and drug dosing
Enter your values above to see the result.
For education and screening only — not a substitute for professional medical assessment. Results should be interpreted by your healthcare provider.
Normal range for most adults. Dialyzer surface area usually matched to BSA.
Lower BSA — smaller dialyzer surface area may be appropriate.
Higher BSA — larger dialyzer or longer sessions may be needed for adequacy.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.