toolfree

Multiplication table

A printable multiplication chart to 9×9, 12×12 or 20×20, with the patterns worth noticing and why the size differs between countries.

Runs in your browser

×1234567891011121314151617181920
11234567891011121314151617181920
2246810121416182022242628303234363840
33691215182124273033363942454851545760
448121620242832364044485256606468727680
55101520253035404550556065707580859095100
66121824303642485460667278849096102108114120
7714212835424956637077849198105112119126133140
881624324048566472808896104112120128136144152160
9918273645546372819099108117126135144153162171180
10102030405060708090100110120130140150160170180190200
11112233445566778899110121132143154165176187198209220
121224364860728496108120132144156168180192204216228240
1313263952657891104117130143156169182195208221234247260
1414284256708498112126140154168182196210224238252266280
15153045607590105120135150165180195210225240255270285300
16163248648096112128144160176192208224240256272288304320
171734516885102119136153170187204221238255272289306323340
181836547290108126144162180198216234252270288306324342360
191938577695114133152171190209228247266285304323342361380
2020406080100120140160180200220240260280300320340360380400

Hover or focus a cell to highlight its row and column.

Three sizes, three traditions

The grid stops at a different place depending on where you were taught:

Up toWhereCalled
9 × 9Taiwan, China, Japan, Korea九九乘法表, 九九表
12 × 12Britain, Ireland, and countries following themtimes tables
20 × 20India, and some competitive-arithmetic teaching

The 9 × 9 table is the smallest that covers every single-digit product, which is all the positional arithmetic algorithm needs. It has 81 cells, and by symmetry only 45 distinct facts to learn.

The British 12 × 12 is a survival of pre-decimal currency and imperial measures: twelve pence to a shilling, twelve inches to a foot. The units went and the table stayed.

The Indian 20 × 20 is not about a measurement system — it is drilled for mental arithmetic speed, and pairs with tricks for squares and near-squares.

Patterns worth noticing

A times table is more learnable as structure than as 81 unrelated facts.

The diagonal is the squares. 1, 4, 9, 16, 25, 36, 49, 64, 81. The gaps between them are the odd numbers: 3, 5, 7, 9, 11 — because n² + (2n+1) = (n+1)².

It is symmetric. 7 × 8 and 8 × 7 are the same cell reflected. That halves what there is to learn, and it is worth pointing out explicitly to a child, who will not assume it.

The nines. Every product of 9 has digits summing to 9: 18, 27, 36, 45, 54, 63, 72, 81. The tens digit counts up and the units digit counts down. There is also the finger method — hold up ten fingers, fold down the nth, and the fingers either side read the answer directly.

The fives alternate 5 and 0, and are half the tens.

The elevens below 10 are the digit doubled: 33, 44, 55. Above that, 11 × n is n with its digits split and their sum inserted — 11 × 23 is 2, (2+3), 3, so 253.

The hard ones

Once symmetry, and the 1, 2, 5, 10 and 11 rows are removed, very few facts are actually difficult. The ones children get wrong most often are:

6 × 7 = 42     7 × 8 = 56     6 × 8 = 48
7 × 9 = 63     8 × 9 = 72     6 × 9 = 54

Six or so facts, not eighty-one. 7 × 8 = 56 has a mnemonic worth knowing: the digits run 5, 6, 7, 8.

Printing it

Print this page and you get the chart with none of the interface around it. Choose the size first — the selector sets what gets printed.

Everything is generated in your browser

The grid is part of the page rather than an image, so it scales, it can be selected and copied as text, and a screen reader can read it as a table.