| square link | 1 sq lnk | 2 sq lnk | 3 sq lnk | 4 sq lnk | 5 sq lnk | 6 sq lnk | 7 sq lnk | 8 sq lnk | 9 sq lnk | 10 sq lnk | 11 sq lnk | 12 sq lnk | 13 sq lnk | 14 sq lnk | 15 sq lnk | 16 sq lnk | 17 sq lnk | 18 sq lnk | 19 sq lnk | 20 sq lnk | 21 sq lnk | 22 sq lnk | 23 sq lnk | 24 sq lnk | 25 sq lnk | 26 sq lnk | 27 sq lnk | 28 sq lnk | 29 sq lnk | 30 sq lnk | 31 sq lnk | 32 sq lnk | 33 sq lnk | 34 sq lnk | 35 sq lnk | 36 sq lnk | 37 sq lnk | 38 sq lnk | 39 sq lnk | 40 sq lnk | 41 sq lnk | 42 sq lnk | 43 sq lnk | 44 sq lnk | 45 sq lnk | 46 sq lnk | 47 sq lnk | 48 sq lnk | 49 sq lnk | 50 sq lnk | 51 sq lnk | 52 sq lnk | 53 sq lnk | 54 sq lnk | 55 sq lnk | 56 sq lnk | 57 sq lnk | 58 sq lnk | 59 sq lnk | 60 sq lnk | 61 sq lnk | 62 sq lnk | 63 sq lnk | 64 sq lnk | 65 sq lnk | 66 sq lnk | 67 sq lnk | 68 sq lnk | 69 sq lnk | 70 sq lnk | 71 sq lnk | 72 sq lnk | 73 sq lnk | 74 sq lnk | 75 sq lnk | 76 sq lnk | 77 sq lnk | 78 sq lnk | 79 sq lnk | 80 sq lnk | 81 sq lnk | 82 sq lnk | 83 sq lnk | 84 sq lnk | 85 sq lnk | 86 sq lnk | 87 sq lnk | 88 sq lnk | 89 sq lnk | 90 sq lnk | 91 sq lnk | 92 sq lnk | 93 sq lnk | 94 sq lnk | 95 sq lnk | 96 sq lnk | 97 sq lnk | 98 sq lnk | 99 sq lnk | 100 sq lnk |
| barn | 4.0468564224 × 1026 b | 8.0937128448 × 1026 b | 1.21405692672 × 1027 b | 1.61874256896 × 1027 b | 2.0234282112 × 1027 b | 2.42811385344 × 1027 b | 2.83279949568 × 1027 b | 3.23748513792 × 1027 b | 3.64217078016 × 1027 b | 4.0468564224 × 1027 b | 4.45154206464 × 1027 b | 4.85622770688 × 1027 b | 5.26091334912 × 1027 b | 5.66559899136 × 1027 b | 6.0702846336 × 1027 b | 6.47497027584 × 1027 b | 6.87965591808 × 1027 b | 7.28434156032 × 1027 b | 7.68902720256 × 1027 b | 8.0937128448 × 1027 b | 8.49839848704 × 1027 b | 8.90308412928 × 1027 b | 9.30776977152 × 1027 b | 9.71245541376 × 1027 b | 1.0117141056 × 1028 b | 1.052182669824 × 1028 b | 1.092651234048 × 1028 b | 1.133119798272 × 1028 b | 1.173588362496 × 1028 b | 1.21405692672 × 1028 b | 1.254525490944 × 1028 b | 1.294994055168 × 1028 b | 1.335462619392 × 1028 b | 1.375931183616 × 1028 b | 1.41639974784 × 1028 b | 1.456868312064 × 1028 b | 1.497336876288 × 1028 b | 1.537805440512 × 1028 b | 1.578274004736 × 1028 b | 1.61874256896 × 1028 b | 1.659211133184 × 1028 b | 1.699679697408 × 1028 b | 1.740148261632 × 1028 b | 1.780616825856 × 1028 b | 1.82108539008 × 1028 b | 1.861553954304 × 1028 b | 1.902022518528 × 1028 b | 1.942491082752 × 1028 b | 1.982959646976 × 1028 b | 2.0234282112 × 1028 b | 2.063896775424 × 1028 b | 2.104365339648 × 1028 b | 2.144833903872 × 1028 b | 2.185302468096 × 1028 b | 2.22577103232 × 1028 b | 2.266239596544 × 1028 b | 2.306708160768 × 1028 b | 2.347176724992 × 1028 b | 2.387645289216 × 1028 b | 2.42811385344 × 1028 b | 2.468582417664 × 1028 b | 2.509050981888 × 1028 b | 2.549519546112 × 1028 b | 2.589988110336 × 1028 b | 2.63045667456 × 1028 b | 2.670925238784 × 1028 b | 2.711393803008 × 1028 b | 2.751862367232 × 1028 b | 2.792330931456 × 1028 b | 2.83279949568 × 1028 b | 2.873268059904 × 1028 b | 2.913736624128 × 1028 b | 2.954205188352 × 1028 b | 2.994673752576 × 1028 b | 3.0351423168 × 1028 b | 3.075610881024 × 1028 b | 3.116079445248 × 1028 b | 3.156548009472 × 1028 b | 3.197016573696 × 1028 b | 3.23748513792 × 1028 b | 3.277953702144 × 1028 b | 3.318422266368 × 1028 b | 3.358890830592 × 1028 b | 3.399359394816 × 1028 b | 3.43982795904 × 1028 b | 3.480296523264 × 1028 b | 3.520765087488 × 1028 b | 3.561233651712 × 1028 b | 3.601702215936 × 1028 b | 3.64217078016 × 1028 b | 3.682639344384 × 1028 b | 3.723107908608 × 1028 b | 3.763576472832 × 1028 b | 3.804045037056 × 1028 b | 3.84451360128 × 1028 b | 3.884982165504 × 1028 b | 3.925450729728 × 1028 b | 3.965919293952 × 1028 b | 4.006387858176 × 1028 b | 4.0468564224 × 1028 b |
Square link (sq. lk.) is an obsolete unit of UK Surveyors' Measure equal to 1089/2500 sq ft.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| square link | sq lnk | ≡ 1 lnk × 1 lnk ≡ 0.66 ft × 0.66 ft | = 4.0468564224×10−2 m2 | Imperial/US |
| square links | barns | square links | barns |
|---|---|---|---|
| 1 | = 4.0468564224E+26 | 6 | = 2.42811385344E+27 |
| 2 | = 8.0937128448E+26 | 7 | = 2.83279949568E+27 |
| 3 | = 1.21405692672E+27 | 8 | = 3.23748513792E+27 |
| 4 | = 1.61874256896E+27 | 9 | = 3.64217078016E+27 |
| 5 | = 2.0234282112E+27 | 10 | = 4.0468564224E+27 |
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 links | barns | square links |
|---|---|---|---|
| 1 | = 2.4710538146717E-27 | 6 | = 1.482632288803E-26 |
| 2 | = 4.9421076293433E-27 | 7 | = 1.7297376702702E-26 |
| 3 | = 7.413161444015E-27 | 8 | = 1.9768430517373E-26 |
| 4 | = 9.8842152586866E-27 | 9 | = 2.2239484332045E-26 |
| 5 | = 1.2355269073358E-26 | 10 | = 2.4710538146717E-26 |
| square links | barns |
|---|---|
| 1 | = 4.0468564224 × 1026 |
| 2.4710538146717 × 10-27 | = 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 …) |