| 0a | 0b |
| 1a | 1 × 10³⁰b |
| 2a | 2 × 10³⁰b |
| 3a | 3 × 10³⁰b |
| 4a | 4 × 10³⁰b |
| 5a | 5 × 10³⁰b |
| 6a | 6 × 10³⁰b |
| 7a | 7 × 10³⁰b |
| 8a | 8 × 10³⁰b |
| 9a | 9 × 10³⁰b |
| 10a | 1 × 10³¹b |
| 11a | 1.1 × 10³¹b |
| 12a | 1.2 × 10³¹b |
| 13a | 1.3 × 10³¹b |
| 14a | 1.4 × 10³¹b |
| 15a | 1.5 × 10³¹b |
| 16a | 1.6 × 10³¹b |
| 17a | 1.7 × 10³¹b |
| 18a | 1.8 × 10³¹b |
| 19a | 1.9 × 10³¹b |
| 20a | 2 × 10³¹b |
| 21a | 2.1 × 10³¹b |
| 22a | 2.2 × 10³¹b |
| 23a | 2.3 × 10³¹b |
| 24a | 2.4 × 10³¹b |
| 25a | 2.5 × 10³¹b |
| 26a | 2.6 × 10³¹b |
| 27a | 2.7 × 10³¹b |
| 28a | 2.8 × 10³¹b |
| 29a | 2.9 × 10³¹b |
| 30a | 3 × 10³¹b |
| 31a | 3.1 × 10³¹b |
| 32a | 3.2 × 10³¹b |
| 33a | 3.3 × 10³¹b |
| 34a | 3.4 × 10³¹b |
| 35a | 3.5 × 10³¹b |
| 36a | 3.6 × 10³¹b |
| 37a | 3.7 × 10³¹b |
| 38a | 3.8 × 10³¹b |
| 39a | 3.9 × 10³¹b |
| 40a | 4 × 10³¹b |
| 41a | 4.1 × 10³¹b |
| 42a | 4.2 × 10³¹b |
| 43a | 4.3 × 10³¹b |
| 44a | 4.4 × 10³¹b |
| 45a | 4.5 × 10³¹b |
| 46a | 4.6 × 10³¹b |
| 47a | 4.7 × 10³¹b |
| 48a | 4.8 × 10³¹b |
| 49a | 4.9 × 10³¹b |
| 50a | 5 × 10³¹b |
| 51a | 5.1 × 10³¹b |
| 52a | 5.2 × 10³¹b |
| 53a | 5.3 × 10³¹b |
| 54a | 5.4 × 10³¹b |
| 55a | 5.5 × 10³¹b |
| 56a | 5.6 × 10³¹b |
| 57a | 5.7 × 10³¹b |
| 58a | 5.8 × 10³¹b |
| 59a | 5.9 × 10³¹b |
| 60a | 6 × 10³¹b |
| 61a | 6.1 × 10³¹b |
| 62a | 6.2 × 10³¹b |
| 63a | 6.3 × 10³¹b |
| 64a | 6.4 × 10³¹b |
| 65a | 6.5 × 10³¹b |
| 66a | 6.6 × 10³¹b |
| 67a | 6.7 × 10³¹b |
| 68a | 6.8 × 10³¹b |
| 69a | 6.9 × 10³¹b |
| 70a | 7 × 10³¹b |
| 71a | 7.1 × 10³¹b |
| 72a | 7.2 × 10³¹b |
| 73a | 7.3 × 10³¹b |
| 74a | 7.4 × 10³¹b |
| 75a | 7.5 × 10³¹b |
| 76a | 7.6 × 10³¹b |
| 77a | 7.7 × 10³¹b |
| 78a | 7.8 × 10³¹b |
| 79a | 7.9 × 10³¹b |
| 80a | 8 × 10³¹b |
| 81a | 8.1 × 10³¹b |
| 82a | 8.2 × 10³¹b |
| 83a | 8.3 × 10³¹b |
| 84a | 8.4 × 10³¹b |
| 85a | 8.5 × 10³¹b |
| 86a | 8.6 × 10³¹b |
| 87a | 8.7 × 10³¹b |
| 88a | 8.8 × 10³¹b |
| 89a | 8.9 × 10³¹b |
| 90a | 9 × 10³¹b |
| 91a | 9.1 × 10³¹b |
| 92a | 9.2 × 10³¹b |
| 93a | 9.3 × 10³¹b |
| 94a | 9.4 × 10³¹b |
| 95a | 9.5 × 10³¹b |
| 96a | 9.6 × 10³¹b |
| 97a | 9.7 × 10³¹b |
| 98a | 9.8 × 10³¹b |
| 99a | 9.9 × 10³¹b |
The are is a unit of area and is a non-SI but metric unit with the symbol a.
It measures exactly 100m² which is the equivalent to 0.0247 acres.
The are is the principle unit for measuring the size of land across the world.
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.