This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
Expected bladder capacity (EBC)
ICCS formula 30 × (age + 1) ml with assessment of the maximum voided volume; Koff and Kaefer formulas for comparison
Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.
Frequently asked questions
Expected bladder capacity (EBC): What does this calculator compute?
Calculates the expected bladder capacity by the ICCS formula (30 × (age + 1) ml, 4–12 years, plateau 390 ml), for comparison by Koff (age + 2 oz) and Kaefer 1997, and rates a measured maximum voided volume as small (< 65 % EBC), normal or large (> 150 % EBC).
Expected bladder capacity (EBC): Which sources is this calculator based on?
Austin PF, Bauer SB, Bower W, et al.: The standardization of terminology of lower urinary tract function in children and adolescents: Update report from the standardization committee of the International Children's Continence Society (Neurourol Urodyn 35:471–481) (2016); Koff SA: Estimating bladder capacity in children (Urology 21:248) (1983); Kaefer M, Zurakowski D, Bauer SB, Retik AB, Peters CA, Atala A, Treves ST: Estimating normal bladder capacity in children (J Urol 158:2261–2264) (1997)