Sumwise

Square feet to square inches

square inches = square feet × 144

Reverse: square inches to square feet

How to convert square feet to square inches

One square foot is 144 square inches, so multiply the number of square feet by 144. For example, 20 square feet is 20 × 144 = 2,880 square inches. To go back, divide by the same number, or multiply by 0.00694444.

Quick estimate

Multiplying by about 100 gets within 30.6% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Area conversions come up when buying flooring, paint or turf, comparing house and flat sizes, and measuring land and gardens.

square feetsquare inches
1 ft2144 in2
2 ft2288 in2
3 ft2432 in2
4 ft2576 in2
5 ft2720 in2
6 ft2864 in2
7 ft21,008 in2
8 ft21,152 in2
9 ft21,296 in2
10 ft21,440 in2
11 ft21,584 in2
12 ft21,728 in2
13 ft21,872 in2
14 ft22,016 in2
15 ft22,160 in2
16 ft22,304 in2
17 ft22,448 in2
18 ft22,592 in2
19 ft22,736 in2
20 ft22,880 in2
25 ft23,600 in2
30 ft24,320 in2
40 ft25,760 in2
50 ft27,200 in2
60 ft28,640 in2
70 ft210,080 in2
75 ft210,800 in2
80 ft211,520 in2
90 ft212,960 in2
100 ft214,400 in2
120 ft217,280 in2
150 ft221,600 in2
200 ft228,800 in2
250 ft236,000 in2
300 ft243,200 in2
400 ft257,600 in2
500 ft272,000 in2
750 ft2108,000 in2
1,000 ft2144,000 in2
1,500 ft2216,000 in2
2,000 ft2288,000 in2
5,000 ft2720,000 in2
10,000 ft21,440,000 in2

Questions

How many square inches are in a square foot?

144 square inches.

How do I convert square feet to square inches in a spreadsheet?

Put the value in A1 and type =A1*144, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.