4 times 7 is 28 — with the shortcut, the division facts and a drill to make it stick
4 × 7 = 28. Four times anything is double-double, so 4 × 7 is just 14 doubled — and 28 turns out to be a surprisingly interesting number.
4 × 7 = 28. Said out loud in the way most classrooms say it: Four sevens are twenty-eight.
7 + 7 + 7 + 7 = 28 — that is four sevens added together.
Multiplying by 4 is doubling twice. Double 7 is 14, double 14 is 28. That works for every fact in the four times table and is usually faster than counting in fours.
28 is four weeks — the length of February in a normal year and of a lunar-style month in many planners.
It is also a perfect number: its factors other than itself (1, 2, 4, 7 and 14) add up to exactly 28. Only a handful of perfect numbers are known below a billion — 6, 28, 496 and 8,128 are the first four.
Method 1, split 7 into 5 + 2: 4 × 5 = 20 (half of 4 × 10 = 40) and 4 × 2 = 8. Add them: 20 + 8 = 28.
Method 2, halve 4, double 7: Halving one factor and doubling the other keeps the answer the same: 4 × 7 = 2 × 14 = 28.
Double twice. 7 doubles to 14, and 14 doubles to 28.
Because one of the factors is even, the answer has to be even. 28 is, so the parity check passes.
4 × 7 = 28, 7 × 4 = 28, 28 ÷ 4 = 7 and 28 ÷ 7 = 4 are one fact read in different directions. The facts either side — 4 × 6 = 24, 4 × 8 = 32, 3 × 7 = 21, 5 × 7 = 35 — are the answers people most often give by mistake when rushing, and each is just one four or one seven away from 28.
28 appears twice in the grid: as 4 × 7 in the four times table and as 7 × 4 in the seven times table. The highlighted row shows both.
| × | 4 times table | 7 times table |
|---|---|---|
| 1 | 4 × 1 = 4 | 7 × 1 = 7 |
| 2 | 4 × 2 = 8 | 7 × 2 = 14 |
| 3 | 4 × 3 = 12 | 7 × 3 = 21 |
| 4 | 4 × 4 = 16 | 7 × 4 = 28 |
| 5 | 4 × 5 = 20 | 7 × 5 = 35 |
| 6 | 4 × 6 = 24 | 7 × 6 = 42 |
| 7 | 4 × 7 = 28 | 7 × 7 = 49 |
| 8 | 4 × 8 = 32 | 7 × 8 = 56 |
| 9 | 4 × 9 = 36 | 7 × 9 = 63 |
| 10 | 4 × 10 = 40 | 7 × 10 = 70 |
| 11 | 4 × 11 = 44 | 7 × 11 = 77 |
| 12 | 4 × 12 = 48 | 7 × 12 = 84 |
These are the facts one step away from 4 × 7 in the grid, and the answers people give by mistake when rushing. The last column shows how far each lands from 28; tap a fact to open it or its times table.
| Fact | Answer | Compared with 28 |
|---|---|---|
| 4 × 6 | 24 | 4 less |
| 4 × 8 | 32 | 4 more |
| 3 × 7 | 21 | 7 less |
| 5 × 7 | 35 | 7 more |
| 3 × 8 | 24 | 4 less |
| 5 × 6 | 30 | 2 more |
| 7 × 4 | 28 | same answer |
Use the drill on this page for a 60-second quiz on 4 × 7 and its neighbours, read the 4 and 7 times tables in full, or play the arcade game until the answer comes without counting.
4 times 7 is 28. In words, four sevens are twenty-eight.
28 ÷ 4 = 7, because 4 × 7 = 28. The matching fact is 28 ÷ 7 = 4.
Method 1, split 7 into 5 + 2: 4 × 5 = 20 (half of 4 × 10 = 40) and 4 × 2 = 8. Add them: 20 + 8 = 28. Method 2, halve 4, double 7: Halving one factor and doubling the other keeps the answer the same: 4 × 7 = 2 × 14 = 28.
Yes. Multiplication can be done in either order, so 4 × 7 and 7 × 4 both equal 28.
Its factors other than itself, 1 + 2 + 4 + 7 + 14, add up to exactly 28. Six is the only smaller perfect number (1 + 2 + 3 = 6).
28 ÷ 4 = 7 and 28 ÷ 7 = 4. Four weeks of seven days is 28 days.
Every times table from 1 to 20 is written out on the times tables page, with a drill for any row, and the full grid is on the multiplication chart.