WoodyJeep:
Putt of 15 ft on the 30 foot meter = 37.5% on the meter, not 50%.
You have to figure slope and distance of putts while considering the green speed of the green you're on. Then I come up to the number of feet I want to putt.
But keep in mind, the dumbest thing about this video game; the 30 foot putt meter is a 40 foot meter. If you want to hit 30 feet it is only 75% of the meter. If you want to hit 40 feet, it is 100% of the 30 foot meter. The other putt meters work the same way. I play with a sheet in front of me where I have already converted the feet into meter%. All of the putt meters work this way.
Not sure how to interpret this...care to clarify? Are you saying that in order to hit a putt 30 feet in distance, you would use your 30 ft meter and hit it 75% of that? Is this supposed putt downhill? Uphill? What speed of green?
Your statement of "Putt of 15 ft on the 30 foot meter = 37.5% on the meter, not 50%." seems to only apply on Championship 13 green speeds for me (effective distance = 11 feet, or 36.5% of a 30 ft meter), assuming that you mean a flat putt.
The only green setting that would cause you to hit harder than the indicated distance (e.g. more than 50% of a 30 ft meter for a 15 foot flat putt) would be Standard or below (anything below 9.0). Or an uphill putt, obviously. On a T-12 green speed, that same 15 ft putt would have to be at least 4 in uphill to have an "effective" distance of more than 15 ft.