calculated renal blood flow rate renal blood flow rate to kidney weight ratio 2013-11-26T16:04:13Z A calculated measurement in which the value for the volume of blood delivered to and/or exiting from the kidneys per unit time is divided by the weight (heaviness or degree to which an object is drawn toward the earth by gravity) of one or both kidneys, and presented as a ratio, fraction, quotient or percentage. JSmith