Okay. Assuming you normalize so that the weaker player has a skill of 10, then a skill of 12 wins about 74% of regular contests.
Code:
Elo Skill
800 6
1000 8
1200 10
1400 12
1600 14
1800 16
2000 18
2200 20
2400 22
2600 24
2800 26
3000 28
Means Magnus Carlsson has 68 points in chess, 13,600 hours, that's probably close.