Conduit BendingUpdated 2026-09-29
Use the table for your conduit type and wire insulation. Every conductor in the raceway counts, including the equipment ground. For mixed sizes, use the conduit fill calculator.
EMT fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 12 | 22 | 35 | 61 | 84 | 138 | 241 | 364 | 476 | 608 |
| #12 | 9 | 16 | 26 | 45 | 61 | 101 | 176 | 266 | 347 | 443 |
| #10 | 5 | 10 | 16 | 28 | 38 | 63 | 111 | 167 | 219 | 279 |
| #8 | 3 | 6 | 9 | 16 | 22 | 36 | 64 | 96 | 126 | 161 |
| #6 | 2 | 4 | 7 | 12 | 16 | 26 | 46 | 69 | 91 | 116 |
| #4 | 1 | 2 | 4 | 7 | 10 | 16 | 28 | 43 | 56 | 71 |
| #3 | 1 | 1 | 3 | 6 | 8 | 13 | 24 | 36 | 47 | 60 |
| #2 | 1 | 1 | 3 | 5 | 7 | 11 | 20 | 30 | 40 | 51 |
| #1 | 1 | 1 | 1 | 4 | 5 | 8 | 15 | 22 | 29 | 37 |
| #1/0 | 1 | 1 | 1 | 3 | 4 | 7 | 12 | 19 | 25 | 32 |
| #2/0 | — | 1 | 1 | 2 | 3 | 6 | 10 | 16 | 20 | 26 |
| #3/0 | — | 1 | 1 | 1 | 3 | 5 | 8 | 13 | 17 | 22 |
| #4/0 | — | 1 | 1 | 1 | 2 | 4 | 7 | 11 | 14 | 18 |
PVC Sch 40 fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 11 | 21 | 34 | 60 | 82 | 135 | 193 | 299 | 401 | 517 |
| #12 | 8 | 15 | 25 | 43 | 59 | 99 | 141 | 218 | 293 | 377 |
| #10 | 5 | 9 | 15 | 27 | 37 | 62 | 89 | 137 | 184 | 238 |
| #8 | 3 | 5 | 9 | 16 | 21 | 36 | 51 | 79 | 106 | 137 |
| #6 | 1 | 4 | 6 | 11 | 15 | 26 | 37 | 57 | 77 | 99 |
| #4 | 1 | 2 | 4 | 7 | 9 | 16 | 22 | 35 | 47 | 61 |
| #3 | 1 | 1 | 3 | 6 | 8 | 13 | 19 | 30 | 40 | 51 |
| #2 | 1 | 1 | 3 | 5 | 7 | 11 | 16 | 25 | 33 | 43 |
| #1 | 1 | 1 | 1 | 3 | 5 | 8 | 12 | 18 | 25 | 32 |
| #1/0 | 1 | 1 | 1 | 3 | 4 | 7 | 10 | 15 | 21 | 27 |
| #2/0 | — | 1 | 1 | 2 | 3 | 6 | 8 | 13 | 17 | 22 |
| #3/0 | — | 1 | 1 | 1 | 3 | 5 | 7 | 11 | 14 | 18 |
| #4/0 | — | 1 | 1 | 1 | 2 | 4 | 6 | 9 | 12 | 15 |
PVC Sch 80 fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 9 | 17 | 28 | 51 | 70 | 118 | 170 | 265 | 358 | 464 |
| #12 | 6 | 12 | 20 | 37 | 51 | 86 | 124 | 193 | 261 | 338 |
| #10 | 4 | 7 | 13 | 23 | 32 | 54 | 78 | 122 | 164 | 213 |
| #8 | 2 | 4 | 7 | 13 | 18 | 31 | 45 | 70 | 95 | 123 |
| #6 | 1 | 3 | 5 | 9 | 13 | 22 | 32 | 51 | 68 | 89 |
| #4 | 1 | 1 | 3 | 6 | 8 | 14 | 20 | 31 | 42 | 54 |
| #3 | 1 | 1 | 3 | 5 | 7 | 12 | 17 | 26 | 35 | 46 |
| #2 | 1 | 1 | 2 | 4 | 6 | 10 | 14 | 22 | 30 | 39 |
| #1 | — | 1 | 1 | 3 | 4 | 7 | 10 | 16 | 22 | 29 |
| #1/0 | — | 1 | 1 | 2 | 3 | 6 | 9 | 14 | 18 | 24 |
| #2/0 | — | 1 | 1 | 1 | 3 | 5 | 7 | 11 | 15 | 20 |
| #3/0 | — | 1 | 1 | 1 | 2 | 4 | 6 | 9 | 13 | 17 |
| #4/0 | — | — | 1 | 1 | 1 | 3 | 5 | 8 | 10 | 14 |
Rigid (RMC) fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 13 | 22 | 36 | 63 | 85 | 140 | 200 | 309 | 412 | 531 |
| #12 | 9 | 16 | 26 | 46 | 62 | 102 | 146 | 225 | 301 | 387 |
| #10 | 6 | 10 | 17 | 29 | 39 | 64 | 92 | 142 | 189 | 244 |
| #8 | 3 | 6 | 9 | 16 | 22 | 37 | 53 | 82 | 109 | 140 |
| #6 | 2 | 4 | 7 | 12 | 16 | 27 | 38 | 59 | 79 | 101 |
| #4 | 1 | 2 | 4 | 7 | 10 | 16 | 23 | 36 | 48 | 62 |
| #3 | 1 | 1 | 3 | 6 | 8 | 14 | 20 | 31 | 41 | 53 |
| #2 | 1 | 1 | 3 | 5 | 7 | 11 | 17 | 26 | 34 | 44 |
| #1 | 1 | 1 | 1 | 4 | 5 | 8 | 12 | 19 | 25 | 33 |
| #1/0 | 1 | 1 | 1 | 3 | 4 | 7 | 10 | 16 | 21 | 27 |
| #2/0 | — | 1 | 1 | 2 | 3 | 6 | 8 | 13 | 18 | 23 |
| #3/0 | — | 1 | 1 | 1 | 3 | 5 | 7 | 11 | 15 | 19 |
| #4/0 | — | 1 | 1 | 1 | 2 | 4 | 6 | 9 | 12 | 16 |
IMC fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 14 | 24 | 39 | 68 | 91 | 149 | 211 | 326 | 436 | 562 |
| #12 | 10 | 17 | 29 | 49 | 67 | 109 | 154 | 238 | 318 | 410 |
| #10 | 6 | 11 | 18 | 31 | 42 | 69 | 97 | 150 | 200 | 258 |
| #8 | 3 | 6 | 10 | 18 | 24 | 39 | 56 | 86 | 115 | 149 |
| #6 | 2 | 4 | 7 | 13 | 17 | 28 | 40 | 62 | 83 | 107 |
| #4 | 1 | 3 | 4 | 8 | 11 | 17 | 25 | 38 | 51 | 66 |
| #3 | 1 | 2 | 4 | 6 | 9 | 15 | 21 | 32 | 43 | 56 |
| #2 | 1 | 1 | 3 | 5 | 7 | 12 | 17 | 27 | 36 | 47 |
| #1 | 1 | 1 | 2 | 4 | 5 | 9 | 13 | 20 | 27 | 35 |
| #1/0 | 1 | 1 | 1 | 3 | 4 | 8 | 11 | 17 | 23 | 29 |
| #2/0 | 1 | 1 | 1 | 3 | 4 | 6 | 9 | 14 | 19 | 24 |
| #3/0 | — | 1 | 1 | 2 | 3 | 5 | 7 | 12 | 16 | 20 |
| #4/0 | — | 1 | 1 | 1 | 2 | 4 | 6 | 9 | 13 | 17 |
Flex (FMC) fill chart, THHN
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 13 | 22 | 33 | 52 | 76 | 135 | 202 | 291 | 396 | 518 |
| #12 | 9 | 16 | 24 | 38 | 56 | 98 | 147 | 212 | 289 | 378 |
| #10 | 6 | 10 | 15 | 24 | 35 | 62 | 93 | 134 | 182 | 238 |
| #8 | 3 | 6 | 9 | 14 | 20 | 35 | 53 | 77 | 105 | 137 |
| #6 | 2 | 4 | 6 | 10 | 14 | 25 | 38 | 55 | 76 | 99 |
| #4 | 1 | 2 | 4 | 6 | 9 | 16 | 24 | 34 | 46 | 61 |
| #3 | 1 | 1 | 3 | 5 | 7 | 13 | 20 | 29 | 39 | 51 |
| #2 | 1 | 1 | 3 | 4 | 6 | 11 | 17 | 24 | 33 | 43 |
| #1 | 1 | 1 | 1 | 3 | 4 | 8 | 12 | 18 | 24 | 32 |
| #1/0 | 1 | 1 | 1 | 2 | 4 | 7 | 10 | 15 | 20 | 27 |
| #2/0 | — | 1 | 1 | 1 | 3 | 6 | 9 | 12 | 17 | 22 |
| #3/0 | — | 1 | 1 | 1 | 2 | 5 | 7 | 10 | 14 | 18 |
| #4/0 | — | 1 | 1 | 1 | 1 | 4 | 6 | 8 | 12 | 15 |
EMT fill chart, XHHW
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 8 | 15 | 25 | 43 | 58 | 96 | 168 | 254 | 332 | 424 |
| #12 | 6 | 11 | 19 | 33 | 45 | 74 | 129 | 195 | 255 | 326 |
| #10 | 5 | 8 | 14 | 24 | 33 | 55 | 96 | 145 | 190 | 243 |
| #8 | 2 | 5 | 8 | 13 | 18 | 30 | 53 | 81 | 105 | 135 |
| #6 | 1 | 3 | 6 | 10 | 14 | 22 | 39 | 60 | 78 | 100 |
| #4 | 1 | 2 | 4 | 7 | 10 | 16 | 28 | 43 | 56 | 72 |
| #3 | 1 | 1 | 3 | 6 | 8 | 14 | 24 | 36 | 48 | 61 |
| #2 | 1 | 1 | 3 | 5 | 7 | 11 | 20 | 31 | 40 | 51 |
| #1 | 1 | 1 | 1 | 4 | 5 | 8 | 15 | 23 | 30 | 38 |
| #1/0 | 1 | 1 | 1 | 3 | 4 | 7 | 13 | 19 | 25 | 32 |
| #2/0 | — | 1 | 1 | 2 | 3 | 6 | 10 | 16 | 21 | 27 |
| #3/0 | — | 1 | 1 | 1 | 3 | 5 | 9 | 13 | 17 | 22 |
| #4/0 | — | 1 | 1 | 1 | 2 | 4 | 7 | 11 | 14 | 18 |
EMT fill chart, THW
| Wire | 1/2" | 3/4" | 1" | 1-1/4" | 1-1/2" | 2" | 2-1/2" | 3" | 3-1/2" | 4" |
|---|---|---|---|---|---|---|---|---|---|---|
| #14 | 6 | 10 | 16 | 28 | 39 | 64 | 112 | 169 | 221 | 282 |
| #12 | 4 | 8 | 13 | 23 | 31 | 51 | 90 | 136 | 177 | 227 |
| #10 | 3 | 6 | 10 | 18 | 24 | 40 | 70 | 106 | 138 | 177 |
| #8 | 1 | 4 | 6 | 10 | 14 | 24 | 42 | 63 | 83 | 106 |
| #6 | 1 | 3 | 4 | 8 | 11 | 18 | 32 | 48 | 63 | 81 |
| #4 | 1 | 1 | 3 | 6 | 8 | 13 | 24 | 36 | 47 | 60 |
| #3 | 1 | 1 | 3 | 5 | 7 | 12 | 20 | 31 | 40 | 52 |
| #2 | 1 | 1 | 2 | 4 | 6 | 10 | 17 | 26 | 34 | 44 |
| #1 | 1 | 1 | 1 | 3 | 4 | 7 | 12 | 18 | 24 | 31 |
| #1/0 | — | 1 | 1 | 2 | 3 | 6 | 10 | 16 | 20 | 26 |
| #2/0 | — | 1 | 1 | 1 | 3 | 5 | 9 | 13 | 17 | 22 |
| #3/0 | — | 1 | 1 | 1 | 2 | 4 | 7 | 11 | 15 | 19 |
| #4/0 | — | — | 1 | 1 | 1 | 3 | 6 | 9 | 12 | 16 |
Raceway internal areas (NEC Chapter 9, Table 4)
| Trade size | EMT | IMC | Rigid (RMC) | PVC Sch 40 | PVC Sch 80 | Flex (FMC) | ENT |
|---|---|---|---|---|---|---|---|
| 3/8" | — | — | — | — | — | 0.116 | — |
| 1/2" | 0.304 | 0.342 | 0.314 | 0.285 | 0.217 | 0.317 | 0.285 |
| 3/4" | 0.533 | 0.586 | 0.549 | 0.508 | 0.409 | 0.533 | 0.508 |
| 1" | 0.864 | 0.959 | 0.887 | 0.832 | 0.688 | 0.817 | 0.832 |
| 1-1/4" | 1.496 | 1.647 | 1.526 | 1.453 | 1.237 | 1.277 | 1.453 |
| 1-1/2" | 2.036 | 2.225 | 2.071 | 1.986 | 1.711 | 1.858 | 1.986 |
| 2" | 3.356 | 3.630 | 3.408 | 3.291 | 2.874 | 3.269 | 3.291 |
| 2-1/2" | 5.858 | 5.135 | 4.866 | 4.695 | 4.119 | 4.909 | — |
| 3" | 8.846 | 7.922 | 7.499 | 7.268 | 6.442 | 7.069 | — |
| 3-1/2" | 11.545 | 10.584 | 10.010 | 9.737 | 8.688 | 9.621 | — |
| 4" | 14.753 | 13.631 | 12.882 | 12.554 | 11.258 | 12.566 | — |
Conductor areas (NEC Chapter 9, Table 5)
| Size | THHN / THWN-2 | XHHW-2 | THW / THHW |
|---|---|---|---|
| #14 | 0.0097 | 0.0139 | 0.0209 |
| #12 | 0.0133 | 0.0181 | 0.0260 |
| #10 | 0.0211 | 0.0243 | 0.0333 |
| #8 | 0.0366 | 0.0437 | 0.0556 |
| #6 | 0.0507 | 0.0590 | 0.0726 |
| #4 | 0.0824 | 0.0814 | 0.0973 |
| #3 | 0.0973 | 0.0962 | 0.1134 |
| #2 | 0.1158 | 0.1146 | 0.1333 |
| #1 | 0.1562 | 0.1534 | 0.1901 |
| #1/0 | 0.1855 | 0.1825 | 0.2223 |
| #2/0 | 0.2223 | 0.2190 | 0.2624 |
| #3/0 | 0.2679 | 0.2642 | 0.3117 |
| #4/0 | 0.3237 | 0.3197 | 0.3718 |
| #250 | 0.3970 | 0.3904 | 0.4596 |
| #300 | 0.4608 | 0.4536 | 0.5281 |
| #350 | 0.5242 | 0.5166 | 0.5958 |
| #400 | 0.5863 | 0.5782 | 0.6619 |
| #500 | 0.7073 | 0.6984 | 0.7901 |
| #600 | 0.8676 | 0.8709 | 0.9729 |
| #750 | 1.0496 | 1.0532 | 1.1652 |
Dimensional data per NEC Chapter 9. Tables 1, 4 and 5 are unchanged in substance between the 2020 and 2023 editions. Always follow the edition your inspector enforces.
Questions electricians ask
How many 10 AWG THHN wires fit in 3/4 EMT?
Ten #10 THHN conductors fit in 3/4" EMT. In 1/2" EMT it is 5, and in 1" EMT it is 16.
How many wires can go in 1/2 PVC?
In 1/2" PVC Schedule 40, 8 #12 THHN or 11 #14 THHN. Schedule 80 has thicker walls and holds fewer: 6 #12 or 9 #14.
Do these tables include the ground wire?
Yes, count the ground as one of the wires. The tables assume every conductor is the same size and insulation; for a mix, use the conduit fill calculator.
Mixed wires? Check it in the app
- Several wire sizes and types in one conduit
- Nipples at 60%, minimum trade size
- Box fill with every NEC 314.16 allowance
- Offline, next to your bending calculators
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Keep going
Conduit Fill
NEC Chapter 9 fill percentage for EMT, IMC, rigid, PVC and flex.
Open →Box FillNEC 314.16 box volume with every allowance counted.
Open →Bending Multiplier ChartMultipliers, shrink per inch and a ready-made offset table from 1" to 24".
Open →OffsetDistance between bends and shrink for any offset depth and angle.
Open →Bender Take-Up ChartTake-up (deduct), gain and radius for EMT and rigid hand benders.
Open →