nPCR Calculator

An indicator for assessing protein intake in dialysis patients
PCR (g/kg/day) = 0.22 + {(0.036 x [ID BUN (mg/dL)] x 24) / [interval (hr)]} + {([Urine urea (g)] x 150) / ([interval (hr)] x [weight (kg)])}

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Previous post-HD BUN (mg/dL):
Midweek pre-HD BUN (mg/dL):
* For thrice-weekly dialysis, measure before the 2nd session (Wed or Thu)
* For twice-weekly dialysis, measure before the 3rd session
Intradialytic interval (hr):
* Typically 44 hours for thrice-weekly dialysis (48 hours minus 4-hour dialysis)
* Typically 68 hours for twice-weekly dialysis (72 hours minus 4-hour dialysis)

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[ Fill in if the patient has urine output ]

Urine Urea (mg/dL):
Urine Volume (mL):
Body weight (kg):

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Recommended to maintain nPCR ≥ 1.0–1.2 g/kg/day
nPCR ≤ 0.8 g/kg/day indicates malnutrition

Reference :
Jindal KK et al. Urea kinetic modeling in chronic hemodialysis: Benefits, problems, and practical solutions. Semin Dial. 1988;1:82-85.
K. Kaynar et al. Evaluation of nutritional parameters of hemodialysis patients, Hippokratia 2012; 16(3):236-240