Natural Logarithm (Base e) Table: 1 to 100
ln(e) = 1. The natural logarithm uses e ≈ 2.718281828 as its base.
Values are rounded to six decimal places. Real logarithms require a positive input; log(0) is undefined.
| n | Logarithm |
|---|---|
| 1 | 0.000000 |
| 2 | 0.693147 |
| 3 | 1.098612 |
| 4 | 1.386294 |
| 5 | 1.609438 |
| 6 | 1.791759 |
| 7 | 1.945910 |
| 8 | 2.079442 |
| 9 | 2.197225 |
| 10 | 2.302585 |
| 11 | 2.397895 |
| 12 | 2.484907 |
| 13 | 2.564949 |
| 14 | 2.639057 |
| 15 | 2.708050 |
| 16 | 2.772589 |
| 17 | 2.833213 |
| 18 | 2.890372 |
| 19 | 2.944439 |
| 20 | 2.995732 |
| 21 | 3.044522 |
| 22 | 3.091042 |
| 23 | 3.135494 |
| 24 | 3.178054 |
| 25 | 3.218876 |
| 26 | 3.258097 |
| 27 | 3.295837 |
| 28 | 3.332205 |
| 29 | 3.367296 |
| 30 | 3.401197 |
| 31 | 3.433987 |
| 32 | 3.465736 |
| 33 | 3.496508 |
| 34 | 3.526361 |
| 35 | 3.555348 |
| 36 | 3.583519 |
| 37 | 3.610918 |
| 38 | 3.637586 |
| 39 | 3.663562 |
| 40 | 3.688879 |
| 41 | 3.713572 |
| 42 | 3.737670 |
| 43 | 3.761200 |
| 44 | 3.784190 |
| 45 | 3.806662 |
| 46 | 3.828641 |
| 47 | 3.850148 |
| 48 | 3.871201 |
| 49 | 3.891820 |
| 50 | 3.912023 |
| 51 | 3.931826 |
| 52 | 3.951244 |
| 53 | 3.970292 |
| 54 | 3.988984 |
| 55 | 4.007333 |
| 56 | 4.025352 |
| 57 | 4.043051 |
| 58 | 4.060443 |
| 59 | 4.077537 |
| 60 | 4.094345 |
| 61 | 4.110874 |
| 62 | 4.127134 |
| 63 | 4.143135 |
| 64 | 4.158883 |
| 65 | 4.174387 |
| 66 | 4.189655 |
| 67 | 4.204693 |
| 68 | 4.219508 |
| 69 | 4.234107 |
| 70 | 4.248495 |
| 71 | 4.262680 |
| 72 | 4.276666 |
| 73 | 4.290459 |
| 74 | 4.304065 |
| 75 | 4.317488 |
| 76 | 4.330733 |
| 77 | 4.343805 |
| 78 | 4.356709 |
| 79 | 4.369448 |
| 80 | 4.382027 |
| 81 | 4.394449 |
| 82 | 4.406719 |
| 83 | 4.418841 |
| 84 | 4.430817 |
| 85 | 4.442651 |
| 86 | 4.454347 |
| 87 | 4.465908 |
| 88 | 4.477337 |
| 89 | 4.488636 |
| 90 | 4.499810 |
| 91 | 4.510860 |
| 92 | 4.521789 |
| 93 | 4.532599 |
| 94 | 4.543295 |
| 95 | 4.553877 |
| 96 | 4.564348 |
| 97 | 4.574711 |
| 98 | 4.584967 |
| 99 | 4.595120 |
| 100 | 4.605170 |