Square Feet Conversion

Calculators can be used to convert measurements from one unit to another

The square foot is a unit used to measure area. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about square feet.

Square Foot Conversion Calculators

Choose a unit of area to convert to.

US Customary
Convert square feet to square miles
1 square foot is equal to 3.587E-8 square miles
Convert square feet to acres
1 square foot is equal to 2.2957E-5 acres
Convert square feet to square yards
1 square foot is equal to 0.111111 square yards
Convert square feet to square inches
1 square foot is equal to 144 square inches
SI Units
Convert square feet to square kilometers
1 square foot is equal to 9.2903E-8 square kilometers
Convert square feet to square meters
1 square foot is equal to 0.092903 square meters
Convert square feet to square centimeters
1 square foot is equal to 929.0304 square centimeters
Convert square feet to square millimeters
1 square foot is equal to 92,903 square millimeters
Other Metric Units
Convert square feet to hectares
1 square foot is equal to 9.2903E-6 hectares
Convert square feet to ares
1 square foot is equal to 0.000929 ares

Square Foot Definition and Usage

One square foot is equal to the area of a square with sides that are 1 foot in length. One square foot is roughly equal to 144 square inches.

The square foot is a US customary and imperial unit of area. A square foot is sometimes also referred to as a square ft. Square feet can be abbreviated as sq ft, and are also sometimes abbreviated as ft². For example, 1 square foot can be written as 1 sq ft or 1 ft².

Try our square footage calculator to calculate the area of a space.

Square Feet Measurement Conversion Table

Common square foot values and equivalent imperial and metric area measurements
square feet square miles acres square yards square inches square kilometers square meters square centimeters square millimeters hectares ares
1 sq ft 0.00000003587 sq mi 0.000022957 ac 0.111111 sq yd 144 sq in 0.000000092903 sq km 0.092903 sq m 929.0304 sq cm 92,903 sq mm 0.0000092903 ha 0.000929 a
2 sq ft 0.00000007174 sq mi 0.000045914 ac 0.222222 sq yd 288 sq in 0.00000018581 sq km 0.185806 sq m 1,858 sq cm 185,806 sq mm 0.000018581 ha 0.001858 a
3 sq ft 0.00000010761 sq mi 0.000068871 ac 0.333333 sq yd 432 sq in 0.00000027871 sq km 0.278709 sq m 2,787 sq cm 278,709 sq mm 0.000027871 ha 0.002787 a
4 sq ft 0.00000014348 sq mi 0.000091827 ac 0.444444 sq yd 576 sq in 0.00000037161 sq km 0.371612 sq m 3,716 sq cm 371,612 sq mm 0.000037161 ha 0.003716 a
5 sq ft 0.00000017935 sq mi 0.000115 ac 0.555556 sq yd 720 sq in 0.00000046452 sq km 0.464515 sq m 4,645 sq cm 464,515 sq mm 0.000046452 ha 0.004645 a
6 sq ft 0.00000021522 sq mi 0.000138 ac 0.666667 sq yd 864 sq in 0.00000055742 sq km 0.557418 sq m 5,574 sq cm 557,418 sq mm 0.000055742 ha 0.005574 a
7 sq ft 0.00000025109 sq mi 0.000161 ac 0.777778 sq yd 1,008 sq in 0.00000065032 sq km 0.650321 sq m 6,503 sq cm 650,321 sq mm 0.000065032 ha 0.006503 a
8 sq ft 0.00000028696 sq mi 0.000184 ac 0.888889 sq yd 1,152 sq in 0.00000074322 sq km 0.743224 sq m 7,432 sq cm 743,224 sq mm 0.000074322 ha 0.007432 a
9 sq ft 0.00000032283 sq mi 0.000207 ac 1 sq yd 1,296 sq in 0.00000083613 sq km 0.836127 sq m 8,361 sq cm 836,127 sq mm 0.000083613 ha 0.008361 a
10 sq ft 0.0000003587 sq mi 0.00023 ac 1.111111 sq yd 1,440 sq in 0.00000092903 sq km 0.92903 sq m 9,290 sq cm 929,030 sq mm 0.000092903 ha 0.00929 a
11 sq ft 0.00000039457 sq mi 0.000253 ac 1.222222 sq yd 1,584 sq in 0.0000010219 sq km 1.021933 sq m 10,219 sq cm 1,021,933 sq mm 0.000102 ha 0.010219 a
12 sq ft 0.00000043044 sq mi 0.000275 ac 1.333333 sq yd 1,728 sq in 0.0000011148 sq km 1.114836 sq m 11,148 sq cm 1,114,836 sq mm 0.000111 ha 0.011148 a
13 sq ft 0.00000046631 sq mi 0.000298 ac 1.444444 sq yd 1,872 sq in 0.0000012077 sq km 1.20774 sq m 12,077 sq cm 1,207,740 sq mm 0.000121 ha 0.012077 a
14 sq ft 0.00000050218 sq mi 0.000321 ac 1.555556 sq yd 2,016 sq in 0.0000013006 sq km 1.300643 sq m 13,006 sq cm 1,300,643 sq mm 0.00013 ha 0.013006 a
15 sq ft 0.00000053805 sq mi 0.000344 ac 1.666667 sq yd 2,160 sq in 0.0000013935 sq km 1.393546 sq m 13,935 sq cm 1,393,546 sq mm 0.000139 ha 0.013935 a
16 sq ft 0.00000057392 sq mi 0.000367 ac 1.777778 sq yd 2,304 sq in 0.0000014864 sq km 1.486449 sq m 14,864 sq cm 1,486,449 sq mm 0.000149 ha 0.014864 a
17 sq ft 0.00000060979 sq mi 0.00039 ac 1.888889 sq yd 2,448 sq in 0.0000015794 sq km 1.579352 sq m 15,794 sq cm 1,579,352 sq mm 0.000158 ha 0.015794 a
18 sq ft 0.00000064566 sq mi 0.000413 ac 2 sq yd 2,592 sq in 0.0000016723 sq km 1.672255 sq m 16,723 sq cm 1,672,255 sq mm 0.000167 ha 0.016723 a
19 sq ft 0.00000068153 sq mi 0.000436 ac 2.111111 sq yd 2,736 sq in 0.0000017652 sq km 1.765158 sq m 17,652 sq cm 1,765,158 sq mm 0.000177 ha 0.017652 a
20 sq ft 0.0000007174 sq mi 0.000459 ac 2.222222 sq yd 2,880 sq in 0.0000018581 sq km 1.858061 sq m 18,581 sq cm 1,858,061 sq mm 0.000186 ha 0.018581 a

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