Table 2.

Normal kidney length (in cm) in adults based on age (in years)

Kidney Length	Age
	30 yr	40 yr	50 yr	60 yr	70 yr
Left median kidney length	11.5	11.3	11.3	11.1	10.5
10th percentile	10.4	10.3	10.2	10.0	9.4
90th percentile	12.8	12.3	12.5	12.2	12.0
Right median kidney length	11.1	11.2	11.0	10.8	10.4
10th percentile	10.1	10.0	10.0	9.5	9.1
90th percentile	12.4	12.3	12.2	12.0	11.8

Kidney length was determined in a random population of study of 665 adult volunteers without ultrasonographic evidence of kidney disease; median left and right kidney size with 10th and 90th percentiles were reported according to age (16).