This chart is based on a Stoich of 14.7 AFR in a perfect world where ethanol is not added to delute our fuel!
Lambda AFR EQRATIO
0.686 10.08 1.45
0.696 10.23 1.43
0.706 10.38 1.41
0.716 10.53 1.39
0.727 10.69 1.37
0.739 10.86 1.35
0.750 11.03 1.33
0.762 11.20 1.31
0.774 11.38 1.28
0.787 11.57 1.26
0.800 11.76 1.24
0.814 11.96 1.22
0.828 12.17 1.20
0.842 12.38 1.18
0.857 12.60 1.16
0.873 12.83 1.14
0.889 13.07 1.12
0.905 13.31 1.10
0.923 13.57 1.08
0.941 13.84 1.06
0.960 14.11 1.04
0.980 14.40 1.02
1.000 14.70 1.0
1.037 15.25 .96
1.078 15.84 .92
1.121 16.48 .89
1.169 17.18 .85
1.220 17.93 .81
1.276 18.76 .78
1.337 19.66 .74
1.405 20.66 .71
Stoich Afr / commanded Afr = Eq Ratio
Example: 14.7 /13.07 = 1.12
Let me know if this needs any corrections. I looked around and couldn't find a simple chart so I put this together for me and others to use.