It seems this method gives a higher odds than texas hold'em calculators
Here the results for cards ah kh 9h th js, pot=40, expected contribution by each player=70

N of pl.| Odds Call/Fold/Raise
_______________________________
2 | 70.9% or 2.44:1 raise
3 | 56.8% or 1.31:1 raise
4 | 48.6% or 1: 1.06 raise
5 | 42.6% or 1: 1.35 raise
6 | 38.7% or 1: 1.58 raise
7 | 35.7% or 1: 1.80 raise
8 | 33.3% or 1: 2.01 raise
9 | 31.2% or 1: 2.20 raise
10 | 29.5% or 1: 2.39 raise