How can i figure out my bladder capacity without going to a urogyn?

Measure.: Though true bladder capacity is obtained during cystocopic or urodynamic evaluation, you can get a rough measure of your bladder capacity by holding your urine until you feel urinary urgency, then voiding into a container and measuring the amount. The average bladder volume is between 400-600ml or 13-20 fl. Oz. If you have any urinary complaints, i so recommend evaluation by a specialist.

Pee into: Something u can measure the urine with.

Measure voids : A rough estimate would be to wait until your bladder feels comfortably full , then measure how much you void. This assumed you empty your bladder completely. ( which most women do ). To measure residual urine, you need to either use an ultrasound (bladder scan) or catheterize the bladder, both of which require a doctor or nurse to perform.