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Kt/V Calculator

Calculate single-pool Kt/V for hemodialysis adequacy using the Daugirdas second-generation equation from pre- and post-dialysis BUN, session length, ultrafiltration volume, and post-dialysis weight.

Blood urea nitrogen before the session, e.g. mg/dL.

Must be lower than the pre-dialysis BUN, same unit.

Actual treatment time in hours, decimals allowed.

Total fluid removed during the session, in liters.

Body weight measured after the session, in kilograms.

Common use limits

This calculator computes single-pool Kt/V using the Daugirdas second-generation equation. It does not calculate equilibrated Kt/V, which accounts for urea rebound after a session ends.

The output is an educational estimate only. It does not replace direct dialysate or blood sampling methods, and it does not set or change a dialysis prescription.

This Kt/V calculator provides educational arithmetic based on the published Daugirdas second-generation single-pool equation and is not medical advice, a diagnosis, or a treatment instruction. Dialysis prescriptions, including session length, blood and dialysate flow, dialyzer choice, and treatment frequency, must be individualized by a nephrologist or dialysis care team based on direct clinical assessment. This single-pool formula does not account for urea rebound after a session ends, which equilibrated Kt/V (eKt/V) is used to estimate, and it does not replace direct dialysate or blood sampling methods used in a dialysis unit. Never adjust a dialysis treatment, medication, or clinical decision based on this calculator alone. Discuss any adequacy question or unexpected result with a qualified healthcare professional.

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