Conduit Fill Chart

This conduit fill chart is used to determine how many wires can be safely put into conduit tubing or pipe at a 40% fill, taking into account cable conduit size vs. cable quantity. 
Cable Quantity versus Conduit Size
Conduit Trade Size: > 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4
Internal Area > 0.30 0.53 0.87 1.50 2.04 3.37 4.79 7.40 9.90 12.76
Permissible Fill (40%) 0.12 0.21 0.35 0.60 0.81 1.35 1.92 2.96 3.96 5.10
Cable OD
(in)
 Cable Area
(in2)		 Number of Cables Which Will Fit in Conduit With 40% Fill
0.125 0.012 9 17 28 48 66 110 156 241 322 415
0.150 0.018 6 11 19 33 45 76 108 167 224 288
0.175 0.024 4 8 14 24 33 56 79 123 164 212
0.200 0.031 3 6 11 19 258 42 61 94 126 162
0.225 0.040 3 5 8 15 20 33 48 74 99 128
0.250 0.049 2 4 7 12 16 27 39 60 80 103
0.275 0.059 2 3 5 10 13 22 32 49 66 85
0.300 0.071 1 2 4 8 11 19 27 41 56 72
0.325 0.083 1 2 4 7 9 16 23 35 47 61
0.350 0.096 1 2 3 6 8 14 19 30 41 53
0.375 0.110 1 1 3 5 7 12 17 26 35 46
0.400 0.126 0 1 2 4 6 10 15 23 31 40
0.425 0.142 0 1 2 4 5 9 13 20 27 35
0.450 0.159 0 1 2 3 5 8 12 18 24 32
0.475 0.177 0 1 1 3 4 7 10 16 22 28
0.500 0.196 0 1 1 3 4 6 9 15 20 25
0.525 0.216 0 0 1 2 3 6 8 13 18 23
0.550 0.238 0 0 1 2 3 5 8 12 16 21
0.575 0.260 0 0 1 2 3 5 7 11 15 19
0.600 0.283 0 0 1 2 2 4 6 10 14 18
0.625 0.307 0 0 1 1 2 4 6 9 12 16
0.650 0.332 0 0 1 1 2 4 5 8 11 15
0.675 0.358 0 0 0 1 2 3 5 8 11 14
0.700 0.385 0 0 0 1 2 3 4 7 10 13
0.750 0.442 0 0 0 1 1 3 4 6 8 11
0.800 0.530 0 0 0 1 1 2 3 5 7 10
0.825 0.5354 0 0 0 1 1 2 3 5 7 9
0.850 0.567 0 0 0 1 1 2 3 5 6 8
0.875 0.601 0 0 0 0 1 2 3 4 6 8
0.900 0.636 0 0 0 0 1 2 3 4 6 8
0.925 0.675 0 0 0 0 1 2 2 4 5 7
0.950 0.709 0 0 0 0 1 1 2 4 5 7
0.975 0.747 0 0 0 0 1 1 2 3 5 6
1.000 0.785 0 0 0 0 1 1 2 3 5 6
1.025 0.825 0 0 0 0 0 1 2 3 4 6
1.050 0.866 0 0 0 0 0 1 2 3 4 5
1.075 0.908 0 0 0 0 0 1 2 3 4 5
1.100 0.950 0 0 0 0 0 1 2 3 4 5
1.125 0.994 0 0 0 0 0 1 1 2 3 5
1.150 1.039 0 0 0 0 0 1 1 2 3 4
1.175 1.084 0 0 0 0 0 1 1 2 3 4
1.200 1.131 0 0 0 0 0 1 1 2 3 4
1.225 1.179 0 0 0 0 0 1 1 2 3 4
1.250 1.227 0 0 0 0 0 1 1 2 3 4
1.275 1.277 0 0 0 0 0 1 1 2 3 3
1.300 1.327 0 0 0 0 0 1 1 2 2 3