| 0b | 0in² |
| 1b | 1.550003 × 10⁻²⁵in² |
| 2b | 3.100006 × 10⁻²⁵in² |
| 3b | 4.650009 × 10⁻²⁵in² |
| 4b | 6.200012 × 10⁻²⁵in² |
| 5b | 7.750016 × 10⁻²⁵in² |
| 6b | 9.300019 × 10⁻²⁵in² |
| 7b | 1.085002 × 10⁻²⁴in² |
| 8b | 1.240002 × 10⁻²⁴in² |
| 9b | 1.395003 × 10⁻²⁴in² |
| 10b | 1.550003 × 10⁻²⁴in² |
| 11b | 1.705003 × 10⁻²⁴in² |
| 12b | 1.860004 × 10⁻²⁴in² |
| 13b | 2.015004 × 10⁻²⁴in² |
| 14b | 2.170004 × 10⁻²⁴in² |
| 15b | 2.325005 × 10⁻²⁴in² |
| 16b | 2.480005 × 10⁻²⁴in² |
| 17b | 2.635005 × 10⁻²⁴in² |
| 18b | 2.790006 × 10⁻²⁴in² |
| 19b | 2.945006 × 10⁻²⁴in² |
| 20b | 3.100006 × 10⁻²⁴in² |
| 21b | 3.255007 × 10⁻²⁴in² |
| 22b | 3.410007 × 10⁻²⁴in² |
| 23b | 3.565007 × 10⁻²⁴in² |
| 24b | 3.720007 × 10⁻²⁴in² |
| 25b | 3.875008 × 10⁻²⁴in² |
| 26b | 4.030008 × 10⁻²⁴in² |
| 27b | 4.185008 × 10⁻²⁴in² |
| 28b | 4.340009 × 10⁻²⁴in² |
| 29b | 4.495009 × 10⁻²⁴in² |
| 30b | 4.650009 × 10⁻²⁴in² |
| 31b | 4.80501 × 10⁻²⁴in² |
| 32b | 4.96001 × 10⁻²⁴in² |
| 33b | 5.11501 × 10⁻²⁴in² |
| 34b | 5.270011 × 10⁻²⁴in² |
| 35b | 5.425011 × 10⁻²⁴in² |
| 36b | 5.580011 × 10⁻²⁴in² |
| 37b | 5.735011 × 10⁻²⁴in² |
| 38b | 5.890012 × 10⁻²⁴in² |
| 39b | 6.045012 × 10⁻²⁴in² |
| 40b | 6.200012 × 10⁻²⁴in² |
| 41b | 6.355013 × 10⁻²⁴in² |
| 42b | 6.510013 × 10⁻²⁴in² |
| 43b | 6.665013 × 10⁻²⁴in² |
| 44b | 6.820014 × 10⁻²⁴in² |
| 45b | 6.975014 × 10⁻²⁴in² |
| 46b | 7.130014 × 10⁻²⁴in² |
| 47b | 7.285015 × 10⁻²⁴in² |
| 48b | 7.440015 × 10⁻²⁴in² |
| 49b | 7.595015 × 10⁻²⁴in² |
| 50b | 7.750016 × 10⁻²⁴in² |
| 51b | 7.905016 × 10⁻²⁴in² |
| 52b | 8.060016 × 10⁻²⁴in² |
| 53b | 8.215016 × 10⁻²⁴in² |
| 54b | 8.370017 × 10⁻²⁴in² |
| 55b | 8.525017 × 10⁻²⁴in² |
| 56b | 8.680017 × 10⁻²⁴in² |
| 57b | 8.835018 × 10⁻²⁴in² |
| 58b | 8.990018 × 10⁻²⁴in² |
| 59b | 9.145018 × 10⁻²⁴in² |
| 60b | 9.300019 × 10⁻²⁴in² |
| 61b | 9.455019 × 10⁻²⁴in² |
| 62b | 9.610019 × 10⁻²⁴in² |
| 63b | 9.76502 × 10⁻²⁴in² |
| 64b | 9.92002 × 10⁻²⁴in² |
| 65b | 1.007502 × 10⁻²³in² |
| 66b | 1.023002 × 10⁻²³in² |
| 67b | 1.038502 × 10⁻²³in² |
| 68b | 1.054002 × 10⁻²³in² |
| 69b | 1.069502 × 10⁻²³in² |
| 70b | 1.085002 × 10⁻²³in² |
| 71b | 1.100502 × 10⁻²³in² |
| 72b | 1.116002 × 10⁻²³in² |
| 73b | 1.131502 × 10⁻²³in² |
| 74b | 1.147002 × 10⁻²³in² |
| 75b | 1.162502 × 10⁻²³in² |
| 76b | 1.178002 × 10⁻²³in² |
| 77b | 1.193502 × 10⁻²³in² |
| 78b | 1.209002 × 10⁻²³in² |
| 79b | 1.224502 × 10⁻²³in² |
| 80b | 1.240002 × 10⁻²³in² |
| 81b | 1.255503 × 10⁻²³in² |
| 82b | 1.271003 × 10⁻²³in² |
| 83b | 1.286503 × 10⁻²³in² |
| 84b | 1.302003 × 10⁻²³in² |
| 85b | 1.317503 × 10⁻²³in² |
| 86b | 1.333003 × 10⁻²³in² |
| 87b | 1.348503 × 10⁻²³in² |
| 88b | 1.364003 × 10⁻²³in² |
| 89b | 1.379503 × 10⁻²³in² |
| 90b | 1.395003 × 10⁻²³in² |
| 91b | 1.410503 × 10⁻²³in² |
| 92b | 1.426003 × 10⁻²³in² |
| 93b | 1.441503 × 10⁻²³in² |
| 94b | 1.457003 × 10⁻²³in² |
| 95b | 1.472503 × 10⁻²³in² |
| 96b | 1.488003 × 10⁻²³in² |
| 97b | 1.503503 × 10⁻²³in² |
| 98b | 1.519003 × 10⁻²³in² |
| 99b | 1.534503 × 10⁻²³in² |
The barn is a unit of area and is used in particle physics with the symbol b.
It represents approximately the area of the cross-section of a uraneum nucleus, so is very small compared to most other recognised units of area.
It is also used to measure the interaction of a nucleus with an electric field gradient in nuclear quadrupole and magnetic resonance.
The square inch is a unit of area and is an imperial unit with the symbol in².
One square inch is equal in area to a square with edges one inch in length.
The square inch is a common unit of measurement in the UK and US.