As golf games go putting is just simple math to achieve length. Obviously you have to hit it lighter down hill and harder up hill...
If your putt is 10 feet away and level you need to hit it 10 feet on the meter.
if your putt is 10 feet away and 5 inches down you need to hit it 5 feet. or if uphill 5 inches you would have to hit it 15 feet.
Soo if you have a putt 47.25 feet long and downhill 12.33 inches you will need to hit the ball 34.92 feet on the meter. If the shot is 12.33 inches uphill your distance away would be 59.58 feet.
Obviously green speeds make a difference, standard and slow greens seem to be close with this calculation. Faster speeds will require less distance.
Basically for every inch up or down you add or subtract 1 foot but this being WTG.. Guessing and hitting a straight shot especially with big break using the outdated swing meter, good luck!