| hour | 1 h | 2 h | 3 h | 4 h | 5 h | 6 h | 7 h | 8 h | 9 h | 10 h | 11 h | 12 h | 13 h | 14 h | 15 h | 16 h | 17 h | 18 h | 19 h | 20 h | 21 h | 22 h | 23 h | 24 h | 25 h | 26 h | 27 h | 28 h | 29 h | 30 h | 31 h | 32 h | 33 h | 34 h | 35 h | 36 h | 37 h | 38 h | 39 h | 40 h | 41 h | 42 h | 43 h | 44 h | 45 h | 46 h | 47 h | 48 h | 49 h | 50 h | 51 h | 52 h | 53 h | 54 h | 55 h | 56 h | 57 h | 58 h | 59 h | 60 h | 61 h | 62 h | 63 h | 64 h | 65 h | 66 h | 67 h | 68 h | 69 h | 70 h | 71 h | 72 h | 73 h | 74 h | 75 h | 76 h | 77 h | 78 h | 79 h | 80 h | 81 h | 82 h | 83 h | 84 h | 85 h | 86 h | 87 h | 88 h | 89 h | 90 h | 91 h | 92 h | 93 h | 94 h | 95 h | 96 h | 97 h | 98 h | 99 h | 100 h |
| attosecond | 3.6 × 1021 as | 7.2 × 1021 as | 1.08 × 1022 as | 1.44 × 1022 as | 1.8 × 1022 as | 2.16 × 1022 as | 2.52 × 1022 as | 2.88 × 1022 as | 3.24 × 1022 as | 3.6 × 1022 as | 3.96 × 1022 as | 4.32 × 1022 as | 4.68 × 1022 as | 5.04 × 1022 as | 5.4 × 1022 as | 5.76 × 1022 as | 6.12 × 1022 as | 6.48 × 1022 as | 6.84 × 1022 as | 7.2 × 1022 as | 7.56 × 1022 as | 7.92 × 1022 as | 8.28 × 1022 as | 8.64 × 1022 as | 9.0 × 1022 as | 9.36 × 1022 as | 9.72 × 1022 as | 1.008 × 1023 as | 1.044 × 1023 as | 1.08 × 1023 as | 1.116 × 1023 as | 1.152 × 1023 as | 1.188 × 1023 as | 1.224 × 1023 as | 1.26 × 1023 as | 1.296 × 1023 as | 1.332 × 1023 as | 1.368 × 1023 as | 1.404 × 1023 as | 1.44 × 1023 as | 1.476 × 1023 as | 1.512 × 1023 as | 1.548 × 1023 as | 1.584 × 1023 as | 1.62 × 1023 as | 1.656 × 1023 as | 1.692 × 1023 as | 1.728 × 1023 as | 1.764 × 1023 as | 1.8 × 1023 as | 1.836 × 1023 as | 1.872 × 1023 as | 1.908 × 1023 as | 1.944 × 1023 as | 1.98 × 1023 as | 2.016 × 1023 as | 2.052 × 1023 as | 2.088 × 1023 as | 2.124 × 1023 as | 2.16 × 1023 as | 2.196 × 1023 as | 2.232 × 1023 as | 2.268 × 1023 as | 2.304 × 1023 as | 2.34 × 1023 as | 2.376 × 1023 as | 2.412 × 1023 as | 2.448 × 1023 as | 2.484 × 1023 as | 2.52 × 1023 as | 2.556 × 1023 as | 2.592 × 1023 as | 2.628 × 1023 as | 2.664 × 1023 as | 2.7 × 1023 as | 2.736 × 1023 as | 2.772 × 1023 as | 2.808 × 1023 as | 2.844 × 1023 as | 2.88 × 1023 as | 2.916 × 1023 as | 2.952 × 1023 as | 2.988 × 1023 as | 3.024 × 1023 as | 3.06 × 1023 as | 3.096 × 1023 as | 3.132 × 1023 as | 3.168 × 1023 as | 3.204 × 1023 as | 3.24 × 1023 as | 3.276 × 1023 as | 3.312 × 1023 as | 3.348 × 1023 as | 3.384 × 1023 as | 3.42 × 1023 as | 3.456 × 1023 as | 3.492 × 1023 as | 3.528 × 1023 as | 3.564 × 1023 as | 3.6 × 1023 as |
An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as 1⁄24 of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| hour | h | ≡ 60 min | = 3600 s | Metric system SI |
| hours | attoseconds | hours | attoseconds |
|---|---|---|---|
| 1 | = 3.6E+21 | 6 | = 2.16E+22 |
| 2 | = 7.2E+21 | 7 | = 2.52E+22 |
| 3 | = 1.08E+22 | 8 | = 2.88E+22 |
| 4 | = 1.44E+22 | 9 | = 3.24E+22 |
| 5 | = 1.8E+22 | 10 | = 3.6E+22 |
Attosecond is equal to 10 second (unit of time), comes from a combination of the metric prefix atto (a) with the second (s). Plural name is attoseconds with symbol is as.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| attosecond | as | ≡ 10-18 second | ≡ 10-18 second | Metric system SI |
| attoseconds | hours | attoseconds | hours |
|---|---|---|---|
| 1 | = 2.7777777777778E-22 | 6 | = 1.6666666666667E-21 |
| 2 | = 5.5555555555556E-22 | 7 | = 1.9444444444444E-21 |
| 3 | = 8.3333333333333E-22 | 8 | = 2.2222222222222E-21 |
| 4 | = 1.1111111111111E-21 | 9 | = 2.5E-21 |
| 5 | = 1.3888888888889E-21 | 10 | = 2.7777777777778E-21 |
| hours | attoseconds |
|---|---|
| 1 | = 3.6 × 1021 |
| 2.7777777777778 × 10-22 | = 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 …) |