| 0cm² | 0b |
| 1cm² | 1 × 10²⁴b |
| 2cm² | 2 × 10²⁴b |
| 3cm² | 3 × 10²⁴b |
| 4cm² | 4 × 10²⁴b |
| 5cm² | 5 × 10²⁴b |
| 6cm² | 6 × 10²⁴b |
| 7cm² | 7 × 10²⁴b |
| 8cm² | 8 × 10²⁴b |
| 9cm² | 9 × 10²⁴b |
| 10cm² | 1 × 10²⁵b |
| 11cm² | 1.1 × 10²⁵b |
| 12cm² | 1.2 × 10²⁵b |
| 13cm² | 1.3 × 10²⁵b |
| 14cm² | 1.4 × 10²⁵b |
| 15cm² | 1.5 × 10²⁵b |
| 16cm² | 1.6 × 10²⁵b |
| 17cm² | 1.7 × 10²⁵b |
| 18cm² | 1.8 × 10²⁵b |
| 19cm² | 1.9 × 10²⁵b |
| 20cm² | 2 × 10²⁵b |
| 21cm² | 2.1 × 10²⁵b |
| 22cm² | 2.2 × 10²⁵b |
| 23cm² | 2.3 × 10²⁵b |
| 24cm² | 2.4 × 10²⁵b |
| 25cm² | 2.5 × 10²⁵b |
| 26cm² | 2.6 × 10²⁵b |
| 27cm² | 2.7 × 10²⁵b |
| 28cm² | 2.8 × 10²⁵b |
| 29cm² | 2.9 × 10²⁵b |
| 30cm² | 3 × 10²⁵b |
| 31cm² | 3.1 × 10²⁵b |
| 32cm² | 3.2 × 10²⁵b |
| 33cm² | 3.3 × 10²⁵b |
| 34cm² | 3.4 × 10²⁵b |
| 35cm² | 3.5 × 10²⁵b |
| 36cm² | 3.6 × 10²⁵b |
| 37cm² | 3.7 × 10²⁵b |
| 38cm² | 3.8 × 10²⁵b |
| 39cm² | 3.9 × 10²⁵b |
| 40cm² | 4 × 10²⁵b |
| 41cm² | 4.1 × 10²⁵b |
| 42cm² | 4.2 × 10²⁵b |
| 43cm² | 4.3 × 10²⁵b |
| 44cm² | 4.4 × 10²⁵b |
| 45cm² | 4.5 × 10²⁵b |
| 46cm² | 4.6 × 10²⁵b |
| 47cm² | 4.7 × 10²⁵b |
| 48cm² | 4.8 × 10²⁵b |
| 49cm² | 4.9 × 10²⁵b |
| 50cm² | 5 × 10²⁵b |
| 51cm² | 5.1 × 10²⁵b |
| 52cm² | 5.2 × 10²⁵b |
| 53cm² | 5.3 × 10²⁵b |
| 54cm² | 5.4 × 10²⁵b |
| 55cm² | 5.5 × 10²⁵b |
| 56cm² | 5.6 × 10²⁵b |
| 57cm² | 5.7 × 10²⁵b |
| 58cm² | 5.8 × 10²⁵b |
| 59cm² | 5.9 × 10²⁵b |
| 60cm² | 6 × 10²⁵b |
| 61cm² | 6.1 × 10²⁵b |
| 62cm² | 6.2 × 10²⁵b |
| 63cm² | 6.3 × 10²⁵b |
| 64cm² | 6.4 × 10²⁵b |
| 65cm² | 6.5 × 10²⁵b |
| 66cm² | 6.6 × 10²⁵b |
| 67cm² | 6.7 × 10²⁵b |
| 68cm² | 6.8 × 10²⁵b |
| 69cm² | 6.9 × 10²⁵b |
| 70cm² | 7 × 10²⁵b |
| 71cm² | 7.1 × 10²⁵b |
| 72cm² | 7.2 × 10²⁵b |
| 73cm² | 7.3 × 10²⁵b |
| 74cm² | 7.4 × 10²⁵b |
| 75cm² | 7.5 × 10²⁵b |
| 76cm² | 7.6 × 10²⁵b |
| 77cm² | 7.7 × 10²⁵b |
| 78cm² | 7.8 × 10²⁵b |
| 79cm² | 7.9 × 10²⁵b |
| 80cm² | 8 × 10²⁵b |
| 81cm² | 8.1 × 10²⁵b |
| 82cm² | 8.2 × 10²⁵b |
| 83cm² | 8.3 × 10²⁵b |
| 84cm² | 8.4 × 10²⁵b |
| 85cm² | 8.5 × 10²⁵b |
| 86cm² | 8.6 × 10²⁵b |
| 87cm² | 8.7 × 10²⁵b |
| 88cm² | 8.8 × 10²⁵b |
| 89cm² | 8.9 × 10²⁵b |
| 90cm² | 9 × 10²⁵b |
| 91cm² | 9.1 × 10²⁵b |
| 92cm² | 9.2 × 10²⁵b |
| 93cm² | 9.3 × 10²⁵b |
| 94cm² | 9.4 × 10²⁵b |
| 95cm² | 9.5 × 10²⁵b |
| 96cm² | 9.6 × 10²⁵b |
| 97cm² | 9.7 × 10²⁵b |
| 98cm² | 9.8 × 10²⁵b |
| 99cm² | 9.9 × 10²⁵b |
The square centimetre is a unit of area and is a multiple of the square metre; an SI derived unit. It has the symbol cm².
A square centimetre is equal to the area of a square with edges 1cm long. There are 10,000 square centimetres in a square metre.
It is often used to describe areas smaller than 1m² - including much work in classrooms on paper.
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.