Anatomy For Sculptors - Have you tried out our free "Human Proportion Calculator"? - http://hpc.anatomy4sculptors.com/ If not, check it out and tell us what you think! Also, you may simply rate it
Power and Sample Size Calculator for a Two Proportions Test
Proportion Calculator
Proportion Calculator - Apps on Google Play
Inverse Proportion using Ratio Mode on the Casio Classwiz Calculator fx-991EX fx-570EX - YouTube