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AFR Table / Lambda Table

Posted by CMB on Nov 25th 2025

AFR Table / Lambda Table

Here’s a simple guide that shows lambda values and what they equal in AFR for different types of fuel. This is helpful when you’re looking at a wideband gauge that reads AFR in the regular “gas” scale.

Lambda Gas AFR E85 AFR E100 AFR Methanol AFR Diesel AFR
0.50 7.35 4.88 4.49 3.23 7.25
0.51 7.50 4.98 4.58 3.29 7.40
0.52 7.64 5.08 4.67 3.36 7.54
0.53 7.79 5.17 4.76 3.42 7.69
0.54 7.94 5.27 4.85 3.49 7.83
0.55 8.09 5.37 4.94 3.55 7.98
0.56 8.23 5.47 5.03 3.62 8.12
0.57 8.38 5.56 5.12 3.68 8.27
0.58 8.53 5.66 5.21 3.74 8.41
0.59 8.67 5.76 5.30 3.81 8.56
0.60 8.82 5.86 5.39 3.87 8.70
0.61 8.97 5.95 5.48 3.94 8.85
0.62 9.11 6.05 5.57 4.00 8.99
0.63 9.26 6.15 5.66 4.07 9.14
0.64 9.41 6.25 5.75 4.13 9.28
0.65 9.56 6.34 5.84 4.20 9.43
0.66 9.70 6.44 5.93 4.26 9.57
0.67 9.85 6.54 6.02 4.33 9.72
0.68 10.00 6.64 6.11 4.39 9.86
0.69 10.14 6.73 6.20 4.46 10.01
0.70 10.29 6.83 6.29 4.52 10.15
0.71 10.44 6.93 6.38 4.58 10.30
0.72 10.58 7.03 6.47 4.65 10.44
0.73 10.73 7.12 6.56 4.71 10.59
0.74 10.88 7.22 6.65 4.78 10.73
0.75 11.03 7.32 6.74 4.84 10.88
0.76 11.17 7.42 6.83 4.91 11.02
0.77 11.32 7.52 6.92 4.97 11.17
0.78 11.47 7.61 7.01 5.04 11.31
0.79 11.61 7.71 7.10 5.10 11.46
0.80 11.76 7.81 7.19 5.17 11.60
0.81 11.91 7.91 7.27 5.23 11.75
0.82 12.05 8.00 7.36 5.29 11.89
0.83 12.20 8.10 7.45 5.36 12.04
0.84 12.35 8.20 7.54 5.42 12.18
0.85 12.50 8.30 7.63 5.49 12.33
0.86 12.64 8.39 7.72 5.55 12.47
0.87 12.79 8.49 7.81 5.62 12.62
0.88 12.94 8.59 7.90 5.68 12.76
0.89 13.08 8.69 7.99 5.75 12.91
0.90 13.23 8.78 8.08 5.81 13.05
0.91 13.38 8.88 8.17 5.88 13.20
0.92 13.52 8.98 8.26 5.94 13.34
0.93 13.67 9.08 8.35 6.00 13.49
0.94 13.82 9.17 8.44 6.07 13.63
0.95 13.97 9.27 8.53 6.13 13.78
0.96 14.11 9.37 8.62 6.20 13.92
0.97 14.26 9.47 8.71 6.26 14.07
0.98 14.41 9.56 8.80 6.33 14.21
0.99 14.55 9.66 8.89 6.39 14.36
1.00 14.70 9.76 8.98 6.46 14.50
1.01 14.85 9.86 9.07 6.52 14.65
1.02 14.99 9.96 9.16 6.59 14.79
1.03 15.14 10.05 9.25 6.65 14.94
1.04 15.29 10.15 9.34 6.71 15.08
1.05 15.44 10.25 9.43 6.78 15.23
1.06 15.58 10.35 9.52 6.84 15.37
1.07 15.73 10.44 9.61 6.91 15.52
1.08 15.88 10.54 9.70 6.97 15.66
1.09 16.02 10.64 9.79 7.04 15.81
1.10 16.17 10.74 9.88 7.10 15.95
1.11 16.32 10.83 9.97 7.17 16.10
1.12 16.46 10.93 10.06 7.23 16.24
1.13 16.61 11.03 10.15 7.30 16.39
1.14 16.76 11.13 10.24 7.36 16.53
1.15 16.91 11.22 10.33 7.43 16.68
1.16 17.05 11.32 10.42 7.49 16.82
1.17 17.20 11.42 10.51 7.55 16.97
1.18 17.35 11.52 10.60 7.62 17.11
1.19 17.49 11.61 10.69 7.68 17.26
1.20 17.64 11.71 10.78 7.75 17.40
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