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Lambda to AFR Conversion
“Quickly convert Lambda values to Air-Fuel Ratios (AFR) for different fuel types with this easy-to-use chart. Covers gasoline, E85, methanol, diesel, and more — helping tuners, racers, and engine builders dial in the perfect mixture for peak performance.”
Lambda | Gas AFR | E85 AFR | E100 AFR | Methanol AFR | Diesel AFR |
0.5 | 7.35 | 4.88 | 4.49 | 3.23 | 7.25 |
0.51 | 7.5 | 4.98 | 4.58 | 3.29 | 7.4 |
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 | 5.3 | 3.81 | 8.56 |
0.6 | 8.82 | 5.86 | 5.39 | 3.87 | 8.7 |
0.61 | 8.97 | 5.95 | 5.48 | 3.94 | 8.85 |
0.62 | 9.11 | 6.05 | 5.57 | 4 | 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 | 4.2 | 9.43 |
0.66 | 9.7 | 6.44 | 5.93 | 4.26 | 9.57 |
0.67 | 9.85 | 6.54 | 6.02 | 4.33 | 9.72 |
0.68 | 10 | 6.64 | 6.11 | 4.39 | 9.86 |
0.69 | 10.14 | 6.73 | 6.2 | 4.46 | 10.01 |
0.7 | 10.29 | 6.83 | 6.29 | 4.52 | 10.15 |
0.71 | 10.44 | 6.93 | 6.38 | 4.58 | 10.3 |
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 | 7.1 | 5.1 | 11.46 |
0.8 | 11.76 | 7.81 | 7.19 | 5.17 | 11.6 |
0.81 | 11.91 | 7.91 | 7.27 | 5.23 | 11.75 |
0.82 | 12.05 | 8 | 7.36 | 5.29 | 11.89 |
0.83 | 12.2 | 8.1 | 7.45 | 5.36 | 12.04 |
0.84 | 12.35 | 8.2 | 7.54 | 5.42 | 12.18 |
0.85 | 12.5 | 8.3 | 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 | 7.9 | 5.68 | 12.76 |
0.89 | 13.08 | 8.69 | 7.99 | 5.75 | 12.91 |
0.9 | 13.23 | 8.78 | 8.08 | 5.81 | 13.05 |
0.91 | 13.38 | 8.88 | 8.17 | 5.88 | 13.2 |
0.92 | 13.52 | 8.98 | 8.26 | 5.94 | 13.34 |
0.93 | 13.67 | 9.08 | 8.35 | 6 | 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 | 6.2 | 13.92 |
0.97 | 14.26 | 9.47 | 8.71 | 6.26 | 14.07 |
0.98 | 14.41 | 9.56 | 8.8 | 6.33 | 14.21 |
0.99 | 14.55 | 9.66 | 8.89 | 6.39 | 14.36 |
1 | 14.7 | 9.76 | 8.98 | 6.46 | 14.5 |
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 | 9.7 | 6.97 | 15.66 |
1.09 | 16.02 | 10.64 | 9.79 | 7.04 | 15.81 |
1.1 | 16.17 | 10.74 | 9.88 | 7.1 | 15.95 |
1.11 | 16.32 | 10.83 | 9.97 | 7.17 | 16.1 |
1.12 | 16.46 | 10.93 | 10.06 | 7.23 | 16.24 |
1.13 | 16.61 | 11.03 | 10.15 | 7.3 | 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 | 17.2 | 11.42 | 10.51 | 7.55 | 16.97 |
1.18 | 17.35 | 11.52 | 10.6 | 7.62 | 17.11 |
1.19 | 17.49 | 11.61 | 10.69 | 7.68 | 17.26 |
1.2 | 17.64 | 11.71 | 10.78 | 7.75 | 17.4 |