Here's the RTC method:

When you sit on your saddle, push up with your feet at the bottom of the stroke with your foot in the position it is when you pedal. If you push up and your butt comes flying up the seat, raise the saddle till you decrease weight from your backside but don't lift it up more than just a hover.

If you can't put your weight on your foot at the bottom of the stroke, your saddles too low.

Done...