14tommk:
I just put little marks on my monitor, one half way then one foot each side. So for 15ft 7ft is half way. so what ever the footage or yardage is I can see how much I need. 50yds 1/2 is 25 . 12ft putt is 3 marks from 15 ft. of course u have to figure in slope, speed and all that. Pretty accurate
First of all you should have explained one thing before giving that information.
The yardage also depends on what club you are using for that 25 yard increment.
What you have just described is for Standard green speed using the 15 foot scale on the meter. Using the same green speed the halfway point on the 30 scale is 15.0 feet.