Macrado's page

Coincidentally (maybe?), by my math (which could be wrong) ~2% of randomly rolled characters (using 3d6) would have an INT score relating to an IQ of 130+

7 combinations of dice give 15+:
666, 665, 664, 663, 655, 654, 555

7/256 = ~2.73%

int 15=127-134; assume 3 in 8 are IQ <130.

3/8 = .625
3 of those dice combinations give score of 15, or 3/256 = ~1.17%
.625*1.17 = ~.73.

2.73-.73 = 2.

Maybe I'm stretching here, but that first bell curve matches this almost perfectly.

:-)

This is the method I have used in the past:

Start with an IQ of 100 being equal to an ability score of 10. Then for each point higher than 10, add 5, then 6, then 7, etc. For each point lower, subtract 5, then 6, then 7, etc.

This seems to give more realistic numbers, creates a bell curve, and accounts for much higher and much lower IQs.

Ability Score: IQ Score
0: <=5
1: 6-19
2: 20-32
3: 33-44
4: 45-55
5: 56-65
6: 66-74
7: 75-82
8: 83-89
9: 90-95
10: 96-100
11: 101-105
12: 106-111
13: 112-118
14: 119-126
15: 127-134
16: 135-145
17: 146-156
18: >=157