| board | 1 bd | 2 bd | 3 bd | 4 bd | 5 bd | 6 bd | 7 bd | 8 bd | 9 bd | 10 bd | 11 bd | 12 bd | 13 bd | 14 bd | 15 bd | 16 bd | 17 bd | 18 bd | 19 bd | 20 bd | 21 bd | 22 bd | 23 bd | 24 bd | 25 bd | 26 bd | 27 bd | 28 bd | 29 bd | 30 bd | 31 bd | 32 bd | 33 bd | 34 bd | 35 bd | 36 bd | 37 bd | 38 bd | 39 bd | 40 bd | 41 bd | 42 bd | 43 bd | 44 bd | 45 bd | 46 bd | 47 bd | 48 bd | 49 bd | 50 bd | 51 bd | 52 bd | 53 bd | 54 bd | 55 bd | 56 bd | 57 bd | 58 bd | 59 bd | 60 bd | 61 bd | 62 bd | 63 bd | 64 bd | 65 bd | 66 bd | 67 bd | 68 bd | 69 bd | 70 bd | 71 bd | 72 bd | 73 bd | 74 bd | 75 bd | 76 bd | 77 bd | 78 bd | 79 bd | 80 bd | 81 bd | 82 bd | 83 bd | 84 bd | 85 bd | 86 bd | 87 bd | 88 bd | 89 bd | 90 bd | 91 bd | 92 bd | 93 bd | 94 bd | 95 bd | 96 bd | 97 bd | 98 bd | 99 bd | 100 bd |
| barn | 7.74192 × 1025 b | 1.548384 × 1026 b | 2.322576 × 1026 b | 3.096768 × 1026 b | 3.87096 × 1026 b | 4.645152 × 1026 b | 5.419344 × 1026 b | 6.193536 × 1026 b | 6.967728 × 1026 b | 7.74192 × 1026 b | 8.516112 × 1026 b | 9.290304 × 1026 b | 1.0064496 × 1027 b | 1.0838688 × 1027 b | 1.161288 × 1027 b | 1.2387072 × 1027 b | 1.3161264 × 1027 b | 1.3935456 × 1027 b | 1.4709648 × 1027 b | 1.548384 × 1027 b | 1.6258032 × 1027 b | 1.7032224 × 1027 b | 1.7806416 × 1027 b | 1.8580608 × 1027 b | 1.93548 × 1027 b | 2.0128992 × 1027 b | 2.0903184 × 1027 b | 2.1677376 × 1027 b | 2.2451568 × 1027 b | 2.322576 × 1027 b | 2.3999952 × 1027 b | 2.4774144 × 1027 b | 2.5548336 × 1027 b | 2.6322528 × 1027 b | 2.709672 × 1027 b | 2.7870912 × 1027 b | 2.8645104 × 1027 b | 2.9419296 × 1027 b | 3.0193488 × 1027 b | 3.096768 × 1027 b | 3.1741872 × 1027 b | 3.2516064 × 1027 b | 3.3290256 × 1027 b | 3.4064448 × 1027 b | 3.483864 × 1027 b | 3.5612832 × 1027 b | 3.6387024 × 1027 b | 3.7161216 × 1027 b | 3.7935408 × 1027 b | 3.87096 × 1027 b | 3.9483792 × 1027 b | 4.0257984 × 1027 b | 4.1032176 × 1027 b | 4.1806368 × 1027 b | 4.258056 × 1027 b | 4.3354752 × 1027 b | 4.4128944 × 1027 b | 4.4903136 × 1027 b | 4.5677328 × 1027 b | 4.645152 × 1027 b | 4.7225712 × 1027 b | 4.7999904 × 1027 b | 4.8774096 × 1027 b | 4.9548288 × 1027 b | 5.032248 × 1027 b | 5.1096672 × 1027 b | 5.1870864 × 1027 b | 5.2645056 × 1027 b | 5.3419248 × 1027 b | 5.419344 × 1027 b | 5.4967632 × 1027 b | 5.5741824 × 1027 b | 5.6516016 × 1027 b | 5.7290208 × 1027 b | 5.80644 × 1027 b | 5.8838592 × 1027 b | 5.9612784 × 1027 b | 6.0386976 × 1027 b | 6.1161168 × 1027 b | 6.193536 × 1027 b | 6.2709552 × 1027 b | 6.3483744 × 1027 b | 6.4257936 × 1027 b | 6.5032128 × 1027 b | 6.580632 × 1027 b | 6.6580512 × 1027 b | 6.7354704 × 1027 b | 6.8128896 × 1027 b | 6.8903088 × 1027 b | 6.967728 × 1027 b | 7.0451472 × 1027 b | 7.1225664 × 1027 b | 7.1999856 × 1027 b | 7.2774048 × 1027 b | 7.354824 × 1027 b | 7.4322432 × 1027 b | 7.5096624 × 1027 b | 7.5870816 × 1027 b | 7.6645008 × 1027 b | 7.74192 × 1027 b |
Board is a unit of area.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| board | bd | ≡ 1 in × 1 ft | ≡ 7.74192×10−3 m2 | Other |
| boards | barns | boards | barns |
|---|---|---|---|
| 1 | ≡ 7.74192E+25 | 6 | ≡ 4.645152E+26 |
| 2 | ≡ 1.548384E+26 | 7 | ≡ 5.419344E+26 |
| 3 | ≡ 2.322576E+26 | 8 | ≡ 6.193536E+26 |
| 4 | ≡ 3.096768E+26 | 9 | ≡ 6.967728E+26 |
| 5 | ≡ 3.87096E+26 | 10 | ≡ 7.74192E+26 |
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 | boards | barns | boards |
|---|---|---|---|
| 1 | ≡ 1.2916692500052E-26 | 6 | ≡ 7.750015500031E-26 |
| 2 | ≡ 2.5833385000103E-26 | 7 | ≡ 9.0416847500362E-26 |
| 3 | ≡ 3.8750077500155E-26 | 8 | ≡ 1.0333354000041E-25 |
| 4 | ≡ 5.1666770000207E-26 | 9 | ≡ 1.1625023250046E-25 |
| 5 | ≡ 6.4583462500258E-26 | 10 | ≡ 1.2916692500052E-25 |
| boards | barns |
|---|---|
| 1 | ≡ 7.74192 × 1025 |
| 1.2916692500052 × 10-26 | ≡ 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 …) |