Chart: Visualising brightness

Download IQ chart (PDF – A4 printable)

This chart is also featured in the popular Australian book for gifted parents, Bright.

To cite this chart: Thompson, A. D. (2016). Bright: Seeing superstars, listening to their worlds, and moving out of the way. Life Architect.
 
 

Chronological & Mental Ages of Gifted Children

Download Mental Ages of Gifted Children chart (PDF – A4 printable)

To cite this chart: Thompson, A. D. (2019). Chronological & Mental Ages of Gifted Children. Life Architect.
 
 

IQ table (uses 15SD as in Wechsler)

Most numbers have been rounded to nearest significant figure.

IQ Percentile Top % 1 in…
200 99.999999998 0.000000002 76 billion
195 99.99999998 0.00000002 8.3 billion
190 99.999999901 0.000000099 1 billion
185 99.9999992 0.0000008 137 million
180 99.999995 0.000005 20.7 million
175 99.99997 0.00003 3.5 million
170 99.9998 0.0002 652,598
165 99.9992 0.0008 136,074
160 99.996 0.004 31,560
155 99.98 0.02 8,137
150 99.95 0.05 2,330
145 99.86 0.14 741
140 99.6 0.4 261
135 99 1 102
130 97.7 2.3 44
125 95.2 4.8 21
120 90.87 9.13 11