Dialysis Adequacy Calculator

Calculate Kt/V and Urea Reduction Ratio (URR) to assess hemodialysis adequacy using the Daugirdas second-generation formula.

Pre-Dialysis Urea (mg/dL)

Post-Dialysis Urea (mg/dL)

Dialysis Time (hours)

Ultrafiltration Volume (liters)

Pre-Dialysis Weight (kg)

Tab to move between fields

Single-Pool Kt/V

1.37

Urea Reduction Ratio68.75%

Adequate Dialysis1

Kt/V (simplified)1.16

Weekly Kt/V (3x/week)4.11

How to Use This Calculator

Enter the pre-dialysis BUN (blood urea nitrogen) in mg/dL.
Enter the post-dialysis BUN after the treatment session.
Input the dialysis session duration in hours.
Enter the ultrafiltration volume in liters removed during treatment.
Review the Kt/V value — a Kt/V ≥ 1.2 per session is the standard adequacy target.

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