The multiples of 81 are 81, 162, 243, 324, 405, 486, 567, 648, 729, 810, and so on — every number you get by multiplying 81 by a whole number. The list never ends.
Below you will find the full multiplication table for 81 up to 100×, the complete list of multiples up to 1,000, a calculator that checks any number for you, and the factors and patterns behind them.
Type any whole number and the answer appears instantly.
Divides the number by 81 and tells you whether it goes in exactly.
Counting in 81s is the fastest way to reach any multiple without multiplying. Each hop below adds another 81.
The complete multiplication table for 81, from 81 × 1 to 81 × 100.
| # | Expression | Result |
|---|---|---|
| 1 | 81 × 1 | 81 |
| 2 | 81 × 2 | 162 |
| 3 | 81 × 3 | 243 |
| 4 | 81 × 4 | 324 |
| 5 | 81 × 5 | 405 |
| 6 | 81 × 6 | 486 |
| 7 | 81 × 7 | 567 |
| 8 | 81 × 8 | 648 |
| 9 | 81 × 9 | 729 |
| 10 | 81 × 10 | 810 |
| 11 | 81 × 11 | 891 |
| 12 | 81 × 12 | 972 |
| 13 | 81 × 13 | 1,053 |
| 14 | 81 × 14 | 1,134 |
| 15 | 81 × 15 | 1,215 |
| 16 | 81 × 16 | 1,296 |
| 17 | 81 × 17 | 1,377 |
| 18 | 81 × 18 | 1,458 |
| 19 | 81 × 19 | 1,539 |
| 20 | 81 × 20 | 1,620 |
| 21 | 81 × 21 | 1,701 |
| 22 | 81 × 22 | 1,782 |
| 23 | 81 × 23 | 1,863 |
| 24 | 81 × 24 | 1,944 |
| 25 | 81 × 25 | 2,025 |
| 26 | 81 × 26 | 2,106 |
| 27 | 81 × 27 | 2,187 |
| 28 | 81 × 28 | 2,268 |
| 29 | 81 × 29 | 2,349 |
| 30 | 81 × 30 | 2,430 |
| 31 | 81 × 31 | 2,511 |
| 32 | 81 × 32 | 2,592 |
| 33 | 81 × 33 | 2,673 |
| 34 | 81 × 34 | 2,754 |
| 35 | 81 × 35 | 2,835 |
| 36 | 81 × 36 | 2,916 |
| 37 | 81 × 37 | 2,997 |
| 38 | 81 × 38 | 3,078 |
| 39 | 81 × 39 | 3,159 |
| 40 | 81 × 40 | 3,240 |
| 41 | 81 × 41 | 3,321 |
| 42 | 81 × 42 | 3,402 |
| 43 | 81 × 43 | 3,483 |
| 44 | 81 × 44 | 3,564 |
| 45 | 81 × 45 | 3,645 |
| 46 | 81 × 46 | 3,726 |
| 47 | 81 × 47 | 3,807 |
| 48 | 81 × 48 | 3,888 |
| 49 | 81 × 49 | 3,969 |
| 50 | 81 × 50 | 4,050 |
| 51 | 81 × 51 | 4,131 |
| 52 | 81 × 52 | 4,212 |
| 53 | 81 × 53 | 4,293 |
| 54 | 81 × 54 | 4,374 |
| 55 | 81 × 55 | 4,455 |
| 56 | 81 × 56 | 4,536 |
| 57 | 81 × 57 | 4,617 |
| 58 | 81 × 58 | 4,698 |
| 59 | 81 × 59 | 4,779 |
| 60 | 81 × 60 | 4,860 |
| 61 | 81 × 61 | 4,941 |
| 62 | 81 × 62 | 5,022 |
| 63 | 81 × 63 | 5,103 |
| 64 | 81 × 64 | 5,184 |
| 65 | 81 × 65 | 5,265 |
| 66 | 81 × 66 | 5,346 |
| 67 | 81 × 67 | 5,427 |
| 68 | 81 × 68 | 5,508 |
| 69 | 81 × 69 | 5,589 |
| 70 | 81 × 70 | 5,670 |
| 71 | 81 × 71 | 5,751 |
| 72 | 81 × 72 | 5,832 |
| 73 | 81 × 73 | 5,913 |
| 74 | 81 × 74 | 5,994 |
| 75 | 81 × 75 | 6,075 |
| 76 | 81 × 76 | 6,156 |
| 77 | 81 × 77 | 6,237 |
| 78 | 81 × 78 | 6,318 |
| 79 | 81 × 79 | 6,399 |
| 80 | 81 × 80 | 6,480 |
| 81 | 81 × 81 | 6,561 |
| 82 | 81 × 82 | 6,642 |
| 83 | 81 × 83 | 6,723 |
| 84 | 81 × 84 | 6,804 |
| 85 | 81 × 85 | 6,885 |
| 86 | 81 × 86 | 6,966 |
| 87 | 81 × 87 | 7,047 |
| 88 | 81 × 88 | 7,128 |
| 89 | 81 × 89 | 7,209 |
| 90 | 81 × 90 | 7,290 |
| 91 | 81 × 91 | 7,371 |
| 92 | 81 × 92 | 7,452 |
| 93 | 81 × 93 | 7,533 |
| 94 | 81 × 94 | 7,614 |
| 95 | 81 × 95 | 7,695 |
| 96 | 81 × 96 | 7,776 |
| 97 | 81 × 97 | 7,857 |
| 98 | 81 × 98 | 7,938 |
| 99 | 81 × 99 | 8,019 |
| 100 | 81 × 100 | 8,100 |
81
There are 1 multiples of 81 between 1 and 100.
81, 162, 243, 324, 405, 486, 567, 648, 729, 810, 891, 972
That is 12 multiples of 81 below 1,000, ending at 972.
Factors are the mirror image of multiples: they divide into 81 exactly, rather than being built from it. The factors of 81 are 1, 3, 9, 27, 81.
Written as pairs: 1 × 81, 3 × 27, 9 × 9.
Broken all the way down into primes, 81 = 3⁴.
The lowest common multiple (LCM) of two numbers is the smallest number that appears in both of their multiplication tables. Here is 81 paired with the numbers it is most often compared to.
| Pair | LCM | Greatest common factor | Next common multiple |
|---|---|---|---|
| 81 and 2 | 162 | 1 | 324 |
| 81 and 3 | 81 | 3 | 162 |
| 81 and 4 | 324 | 1 | 648 |
| 81 and 5 | 405 | 1 | 810 |
| 81 and 6 | 162 | 3 | 324 |
Start at 81 and keep adding 81. That gives 81, 162, 243, 324, 405, and the pattern continues for as long as you want to go. Multiplying is simply a shortcut for the same thing: 81 × 7 = 567 saves you counting seven hops one at a time.
Because 81 is odd, its multiples alternate between odd and even. That alternation is a quick way to sanity-check an answer before you write it down.
The last digits repeat in a cycle of 10: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, then back to the start. Spotting that cycle is a fast way to rule out a wrong answer.
The multiples of 81 are 81, 162, 243, 324, 405, 486, 567, 648, 729, 810, and so on. Each one is 81 multiplied by a whole number, so the list continues without end.
There are 1 multiples of 81 between 1 and 100: 81.
There are 12 multiples of 81 below 1,000. They run from 81 up to 972.
The 10th multiple of 81 is 81 × 10 = 810.
The factors of 81 are 1, 3, 9, 27, 81 — 5 in total. Factors divide into 81; multiples are built out of it.
No. 81 is a composite number — it has 5 factors, and breaks down into 3⁴.
The lowest common multiple of 81 and 2 is 162. It is the first number that appears in both multiplication tables.