| square mil | 1 sq mil | 2 sq mil | 3 sq mil | 4 sq mil | 5 sq mil | 6 sq mil | 7 sq mil | 8 sq mil | 9 sq mil | 10 sq mil | 11 sq mil | 12 sq mil | 13 sq mil | 14 sq mil | 15 sq mil | 16 sq mil | 17 sq mil | 18 sq mil | 19 sq mil | 20 sq mil | 21 sq mil | 22 sq mil | 23 sq mil | 24 sq mil | 25 sq mil | 26 sq mil | 27 sq mil | 28 sq mil | 29 sq mil | 30 sq mil | 31 sq mil | 32 sq mil | 33 sq mil | 34 sq mil | 35 sq mil | 36 sq mil | 37 sq mil | 38 sq mil | 39 sq mil | 40 sq mil | 41 sq mil | 42 sq mil | 43 sq mil | 44 sq mil | 45 sq mil | 46 sq mil | 47 sq mil | 48 sq mil | 49 sq mil | 50 sq mil | 51 sq mil | 52 sq mil | 53 sq mil | 54 sq mil | 55 sq mil | 56 sq mil | 57 sq mil | 58 sq mil | 59 sq mil | 60 sq mil | 61 sq mil | 62 sq mil | 63 sq mil | 64 sq mil | 65 sq mil | 66 sq mil | 67 sq mil | 68 sq mil | 69 sq mil | 70 sq mil | 71 sq mil | 72 sq mil | 73 sq mil | 74 sq mil | 75 sq mil | 76 sq mil | 77 sq mil | 78 sq mil | 79 sq mil | 80 sq mil | 81 sq mil | 82 sq mil | 83 sq mil | 84 sq mil | 85 sq mil | 86 sq mil | 87 sq mil | 88 sq mil | 89 sq mil | 90 sq mil | 91 sq mil | 92 sq mil | 93 sq mil | 94 sq mil | 95 sq mil | 96 sq mil | 97 sq mil | 98 sq mil | 99 sq mil | 100 sq mil |
| barn | 6.4516 × 1018 b | 1.29032 × 1019 b | 1.93548 × 1019 b | 2.58064 × 1019 b | 3.2258 × 1019 b | 3.87096 × 1019 b | 4.51612 × 1019 b | 5.16128 × 1019 b | 5.80644 × 1019 b | 6.4516 × 1019 b | 7.09676 × 1019 b | 7.74192 × 1019 b | 8.38708 × 1019 b | 9.03224 × 1019 b | 9.6774 × 1019 b | 1.032256 × 1020 b | 1.096772 × 1020 b | 1.161288 × 1020 b | 1.225804 × 1020 b | 1.29032 × 1020 b | 1.354836 × 1020 b | 1.419352 × 1020 b | 1.483868 × 1020 b | 1.548384 × 1020 b | 1.6129 × 1020 b | 1.677416 × 1020 b | 1.741932 × 1020 b | 1.806448 × 1020 b | 1.870964 × 1020 b | 1.93548 × 1020 b | 1.999996 × 1020 b | 2.064512 × 1020 b | 2.129028 × 1020 b | 2.193544 × 1020 b | 2.25806 × 1020 b | 2.322576 × 1020 b | 2.387092 × 1020 b | 2.451608 × 1020 b | 2.516124 × 1020 b | 2.58064 × 1020 b | 2.645156 × 1020 b | 2.709672 × 1020 b | 2.774188 × 1020 b | 2.838704 × 1020 b | 2.90322 × 1020 b | 2.967736 × 1020 b | 3.032252 × 1020 b | 3.096768 × 1020 b | 3.161284 × 1020 b | 3.2258 × 1020 b | 3.290316 × 1020 b | 3.354832 × 1020 b | 3.419348 × 1020 b | 3.483864 × 1020 b | 3.54838 × 1020 b | 3.612896 × 1020 b | 3.677412 × 1020 b | 3.741928 × 1020 b | 3.806444 × 1020 b | 3.87096 × 1020 b | 3.935476 × 1020 b | 3.999992 × 1020 b | 4.064508 × 1020 b | 4.129024 × 1020 b | 4.19354 × 1020 b | 4.258056 × 1020 b | 4.322572 × 1020 b | 4.387088 × 1020 b | 4.451604 × 1020 b | 4.51612 × 1020 b | 4.580636 × 1020 b | 4.645152 × 1020 b | 4.709668 × 1020 b | 4.774184 × 1020 b | 4.8387 × 1020 b | 4.903216 × 1020 b | 4.967732 × 1020 b | 5.032248 × 1020 b | 5.096764 × 1020 b | 5.16128 × 1020 b | 5.225796 × 1020 b | 5.290312 × 1020 b | 5.354828 × 1020 b | 5.419344 × 1020 b | 5.48386 × 1020 b | 5.548376 × 1020 b | 5.612892 × 1020 b | 5.677408 × 1020 b | 5.741924 × 1020 b | 5.80644 × 1020 b | 5.870956 × 1020 b | 5.935472 × 1020 b | 5.999988 × 1020 b | 6.064504 × 1020 b | 6.12902 × 1020 b | 6.193536 × 1020 b | 6.258052 × 1020 b | 6.322568 × 1020 b | 6.387084 × 1020 b | 6.4516 × 1020 b |
A square mil is a unit of area, equal to the area of a square with sides of length one mil. A mil is one thousandth of an international inch. This unit of area is usually used in specifying the area of the cross section of a wire or cable.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| square mil | sq mil | ≡ 1 mil × 1 mil | = 6.4516×10−10 m2 | Imperial/US |
| square mils | barns | square mils | barns |
|---|---|---|---|
| 1 | = 6.4516E+18 | 6 | = 3.87096E+19 |
| 2 | = 1.29032E+19 | 7 | = 4.51612E+19 |
| 3 | = 1.93548E+19 | 8 | = 5.16128E+19 |
| 4 | = 2.58064E+19 | 9 | = 5.80644E+19 |
| 5 | = 3.2258E+19 | 10 | = 6.4516E+19 |
A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| barn | b | ≡ 10−28 m2 | ≡ 10−28 m2 | Nuclear Physics |
| barns | square mils | barns | square mils |
|---|---|---|---|
| 1 | = 1.5500031000062E-19 | 6 | = 9.3000186000372E-19 |
| 2 | = 3.1000062000124E-19 | 7 | = 1.0850021700043E-18 |
| 3 | = 4.6500093000186E-19 | 8 | = 1.240002480005E-18 |
| 4 | = 6.2000124000248E-19 | 9 | = 1.3950027900056E-18 |
| 5 | = 7.750015500031E-19 | 10 | = 1.5500031000062E-18 |
| square mils | barns |
|---|---|
| 1 | = 6.4516 × 1018 |
| 1.5500031000062 × 10-19 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |