Orifice Area Conversion Chart

Helpful for race cars, hot rods, Ford Mustang, Camaro, Corvette and performance engine tuners working with jet or pill sizes.

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Diameter (Inches)Area (SQ. inches)
.020 .000314
.021 .000346
.022 .000380
.023 .000415
.024 .000452
.025 .000491
.026 .000531
.027 .000573
.028 .000616
.029 .000661
.030 .000707
.031 .000755
.032 .000804
.033 .000855
.034 .000908
.035 .000962
.036 .001018
.037 .001075
.038 .001134
.039 .001195
.040 .001257
.041 .001320
.041 .001385
.043 .001452
.044 .001521
.045 .001590
.046 .001662
.047 .001735
.048 .001810
.049 .001886
.050 .001964
.051 .002043
.052 .002124
.053 .002206
.054 .002290
.055 .002376
.056 .002463
.057 .002552
.058 .002642
.059 .002734
.060 .002827
.061 .002922
.062 .003019
.063 .003117
.064 .003217
.065 .003318
.066 .003421
.067 .003526
.068 .003632
.069 .003739
.070 .003848
.071 .003959
.072 .004072
.073 .004185
.074 .004310
.075 .004418
.076 .004536
.077 .004657
.078 .004778
.079 .004902
.080 .005027
.081 .005153
.082 .005281
.083 .005411
.084 .005542
.085 .005675
.086 .005809
.087 .005945
.088 .006082
.089 .006221
.090 .006362
.091 .006504
.092 .006648
.093 .006793
.094 .006940
.095 .007088
.096 .007238
.097 .007390
.098 .007543
.099 .007698
.100 .007854
.101 .008012
.102 .008171
.103 .008332
.104 .008495
.105 .008659
.106 .008825
.107 .008992
.108 .009161
.109 .009331
.110 .009503
.111 .009677
.112 .009852
.113 .010029
.114 .010207
.115 .010387
.116 .010568
.117 .010751
.118 .010936
.119 .011122
.120 .011310
.121 .011499
.122 .011690
.123 .011882
.124 .012076
.125 .012272
.126 .012469
.127 .012668
.128 .012868
.129 .013070
.130 .013273
.131 .013478
.132 .013685
.133 .013893
.134 .014103
.135 .014314
.136 .014527
.137 .014741
.138 .014957
.139 .015175
.140 .015394
.141 .015615
.142 .015837
.143 .016061
.144 .016277
.145 .016513
.146 .016742
.147 .016972
.148 .017203
.149 .017437
.150 .017672
.151 .017908
.152 .018146
.153 .018385
.154 .018627
.155 .018869
.156 .019113
.157 .019359
.158 .019607
.159 .019856
.160 .020106
.161 .020358
.162 .020612
.163 .020867
.164 .021124
.165 .021383
.166 .021642
.167 .021904
.168 .022167
.169 .022432
.170 .022698
.171 .022966
.172 .023235
.173 .023506
.174 .023779
.175 .024053
.176 .024329
.177 .024606
.178 .024885
.179 .025165
.180 .025447
.181 .025730
.182 .026015
.183 .026302
.184 .026590
.185 .026880
.186 .027172
.187 .027465
.188 .027759
.189 .028055
.190 .028352
.191 .028652

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