The average blood loss during menstruation is 35 millilitres with 10-80 mL considered normal.
Though it may look like a lot, the average amount of blood is only about 2 tablespoons (30 milliliters) for an entire period.
My Diva Cup has a milliliter measurement on the side, showing where the 7.5 and 15mL marks are. I JUST measured in a separate container to be absolutely sure (because I wear mine inside out), and yeah, the measurements are right. The 15mL mark isn't at the top, so I measured also how much it is when my cup is the normal fullness. 17mL.
Yesterday my period started. I was using the MeLuna (about 7mL capacity) to wait for it to begin, and emptied that. The rest of the day and night and today, I've emptied my very full Diva cup 6 times. Once it was in the middle of the night so I didn't get to measure. The 8th time it was at 7mL. I just emptied another 5mL out.
I don't particularly care what x is; it's the one I emptied in the middle of the night. Probably half full. Anyway, even if I don't count that one, 121mL is a FAR cry from the 30-35mL average. That's like three times average.
I'm not worried because this is normal for me, and I have never tested anemic, but whenever the doctors ask if I have heavy periods, I always say no. I've just never actually kept TRACK before. The menstrual cup is so great that I sometimes forget I HAVE my period, so it never occurred to me that it might be heavy.
Anyone else measure what they get? Do you find that "average estimates" are way off too? I have trouble believing that 30mL could be a normal period. Someone who's cup only fills to the top twice and then they're done? Does that really happen?