My wife the spreadsheet guru made this for me in about 2 mins to use when trying the Nike Putter. Use it with Putterpal scale which has lines at 10% increments
I've got it printed off and keep beside my computer and keeps me from having to use a calculator when figuring putting distance. Personally, I usually 2ft of distance to whatever the sheet says to insure it gets past the hole.
Example of how to use this chart
10.8ft putt 2 up on very fast green
I'd hit it 10.8+2(up elevation)+2 (added power=16.8 ft of power
so looking at very fast green speed scale
you will see 70% of 20ft meter hits it 16.8ft
Right click, open below pic in new tab to get fullsize , then you can save or print it off