programmed by Stephen Z Fadem


Beta version


Male Female
Feet inches Centimeters
Check anthropometric equations
feet inches
Weight in kg
Age in years


V24 hr urine: cc
Uurine urea nitrogen: mg/dL
Pplasma urea nitrogen: mg/dL
RKCuncorrected for BSA (Residual Kidney Function): ??? cc/min
RKC (Residual Kidney Function): ??? cc/min/1.73m2
RKC/VWatson: ???L/wk
RKC/VHume: ???L/wk


Vdialysate: Liters/24 hr
Udialysate urea: mg/dL
Purea: ___ mg/dL
Cdialysate: ??? L/week
Cdialysate: ??? L/week/1.73m2


kt/VWatson: ___
kt/VHume: ___
TBWWatson: ??? (anthropometric volume)
TBWHume: ???(anthropometric volume)
BSADubois: ??? (Body Surface Area)


  • RKC=V*U urea/Purea
  • RKCcc/min=RKC/1440
  • RKCcorrected=RKC*1.73/BSA;
  • RKCL/min=RKC/1000
  • RKCL/wk=RKCmin/cc*10080
  • RKC/VWatson=RKCL/wk/V (Watson)
  • RKC/VHume=RKCL/wk/V (Hume)
  • Cdialysate=Durea*Vdialysate/Purea)*1.73/BSA
  • Kt/Vwk=(RKC+Cdialysate)/Vanthropometric
    • 10080=minutes/week =24 hours*7 days*60 min
    • 1440=minutes/24 hours
    • C=Clearance
    • P=Ureaplasma urea nitrogen
    • RKC = residual kidney function
    • D=dialysate
    • V = volume
    • U = urine


  1. K DOQI 2006 Updates
  2. Watson PE, Watson ID, Batt RD. Total body water volumes for adult males and females estimated from simple anthropometric measurements Am J Clin Nutr 33:27-39, 1980
  3. Hume R and Weyers E. Relationship between total body water and surface area in normal and obese subjects Clin Path 24(3):234-238, 1971
  4. DuBois D, DuBois EF.Clinical Calorimetry: Tenth Paper A formula to estimate the approximate surface area if the height and weight are known. Arch Intern Medicine. 17:863-71, 1916

© 2008-22, Stephen Z. Fadem, M.D., FASN. All rights reserved. No part of this application may be duplicated without written permission from the author.


The licensee or user understand and agree that the technology and content of this application are provided for educational purposes only. All calculations must be checked for accuracy and confirmed before use, clinical or otherwise. All medical decisions must be based upon the clinical judgment of a licensed physician. Licensee or user assumes the duty to have any and all laboratory values or calculations verified by a licensed physician. Neither licensor nor its associated authors or other entities warrant the accuracy of any information provided by or resulting from the technology or the content for clinical management, and licensee or user agree that no such persons or entities shall be liable for any adverse consequences resulting from the use of any of the same.

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