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Convert Area
From
To
1 ac = 43,560 ft²
1 ac in other units
Square foot43,560 ft²
Square meter4,046.8564 m²
Square yard4,840 yd²
Hectare0.404686 ha
Acre1 ac
Square inch6,272,640 in²
Square mile0.001563 mi²
Square kilometer0.004047 km²
You can type a fraction (1/4, 1 1/2) or a number with commas (43,560). Click a pair below, or a row in any chart, to fill the boxes.
Common Area Conversions
Area Conversion Formulas
acres =square feet43,560
square feet = acres × 43,560
square meters = square feet × 0.09290304
square feet = square meters × 10.7639104
acres = hectares × 2.4710538
hectares = acres × 0.40468564
square yards = square feet ÷ 9
Every factor is exact: an acre is defined as exactly 4,046.8564224 m².
Area Units at a Glance
Unit
Symbol
Equals
Square millimeter
mm²
0.000001 m²
Square centimeter
cm²
0.0001 m²
Square meter
m²
1 m²
Are
a
100 m²
Hectare
ha
10,000 m²
Square kilometer
km²
1,000,000 m²
Square inch
in²
0.00064516 m²
Square foot
ft²
0.09290304 m²
Square yard
yd²
0.83612736 m²
Acre
ac
4,046.8564224 m²
Square mile
mi²
2,589,988.110336 m²
Area Conversion Table
One square meter, square foot, acre and hectare in every unit.
Unit
1 m²
1 ft²
1 acre
1 hectare
Square millimeter
1,000,000
92,903.04
4,046,856,422.4
10,000,000,000
Square centimeter
10,000
929.0304
40,468,564.224
100,000,000
Square meter
1
0.09290304
4,046.8564224
10,000
Are
0.01
0.00092903
40.46856422
100
Hectare
0.0001
0.00000929
0.40468564
1
Square kilometer
0.000001
0.00000009
0.00404686
0.01
Square inch
1,550.00310001
144
6,272,640
15,500,031.000062
Square foot
10.76391042
1
43,560
107,639.1041671
Square yard
1.19599005
0.11111111
4,840
11,959.90046301
Acre
0.00024711
0.00002296
1
2.47105381
Square mile
0.00000039
0.00000004
0.0015625
0.00386102
Popular Conversion Charts
The values people look up most. Pick a conversion, then click a row to convert it.
Square feet
Acres
0.00002 ac
0.01148 ac
0.02296 ac
0.11478 ac
0.13774 ac
0.1607 ac
0.18365 ac
0.20661 ac
0.22957 ac
0.34435 ac
0.45914 ac
1 ac
Acres
Square feet
4,356 ft²
10,890 ft²
13,068 ft²
21,780 ft²
43,560 ft²
87,120 ft²
130,680 ft²
174,240 ft²
217,800 ft²
435,600 ft²
1,089,000 ft²
Square meters
Square feet
10.76391 ft²
53.81955 ft²
107.6391 ft²
215.27821 ft²
269.09776 ft²
538.19552 ft²
1,076.39104 ft²
1,614.58656 ft²
2,152.78208 ft²
5,381.95521 ft²
10,763.91042 ft²
Square feet
Square meters
0.0929 m²
0.92903 m²
9.2903 m²
18.58061 m²
46.45152 m²
74.32243 m²
92.90304 m²
111.48365 m²
139.35456 m²
185.80608 m²
232.2576 m²
Hectares
Acres
1.23553 ac
2.47105 ac
4.94211 ac
6.17763 ac
12.35527 ac
24.71054 ac
49.42108 ac
123.55269 ac
247.10538 ac
Acres
Hectares
0.20234 ha
0.40469 ha
0.80937 ha
2.02343 ha
4.04686 ha
8.09371 ha
16.18743 ha
20.23428 ha
40.46856 ha
258.99881 ha
Square feet
Square yards
0.11111 yd²
1 yd²
2 yd²
3 yd²
4 yd²
5 yd²
10 yd²
11.11111 yd²
20 yd²
22.22222 yd²
55.55556 yd²
Square yards
Square feet
9 ft²
18 ft²
45 ft²
90 ft²
180 ft²
450 ft²
900 ft²
1,800 ft²
Square inches
Square feet
0.00694 ft²
0.08333 ft²
0.25 ft²
0.5 ft²
0.69444 ft²
1 ft²
2 ft²
3 ft²
4 ft²
6.94444 ft²
Square feet
Square inches
144 in²
288 in²
432 in²
576 in²
720 in²
864 in²
1,152 in²
1,440 in²
Acres
Square meters
404.68564 m²
1,011.71411 m²
2,023.42821 m²
4,046.85642 m²
8,093.71284 m²
20,234.28211 m²
40,468.56422 m²
202,342.82112 m²
404,685.64224 m²
Square meters
Acres
0.02471 ac
0.12355 ac
0.24711 ac
0.49421 ac
0.98842 ac
1.23553 ac
2.47105 ac
4.94211 ac
12.35527 ac
Acres
Square miles
0.00156 mi²
0.01563 mi²
0.0625 mi²
0.125 mi²
0.25 mi²
0.5 mi²
1 mi²
2 mi²
Square miles
Acres
6.4 ac
64 ac
160 ac
320 ac
640 ac
1,280 ac
3,200 ac
6,400 ac
Square kilometers
Square miles
0.3861 mi²
0.7722 mi²
1.93051 mi²
3.86102 mi²
9.65255 mi²
19.30511 mi²
38.61022 mi²
193.05108 mi²
386.10216 mi²
Square miles
Square kilometers
2.58999 km²
5.17998 km²
12.94994 km²
25.89988 km²
64.7497 km²
129.49941 km²
258.99881 km²
1,294.99406 km²
2,589.98811 km²
1 acre = 43,560 ft². Every chart is worked out with the same maths as the converter.
Fractions of an Acre
Common lot sizes in square feet, square meters and hectares. Click a row to convert it.
Acres
Square feet
Square meters
Hectares
5,445
505.8571
0.0506
10,890
1,011.7141
0.1012
14,520
1,348.9521
0.1349
21,780
2,023.4282
0.2023
32,670
3,035.1423
0.3035
43,560
4,046.8564
0.4047
87,120
8,093.7128
0.8094
217,800
20,234.2821
2.0234
435,600
40,468.5642
4.0469
1,742,400
161,874.2569
16.1874
4,356,000
404,685.6422
40.4686
27,878,400
2,589,988.1103
258.9988
How Many in a …?
The answers to the most asked questions, such as how many square feet are in an acre.
One
Equals
1 acre
43,560 ft² = 4,840 yd² = 4,046.8564224 m² = 0.40468564 ha
1 hectare
10,000 m² = 2.47105381 ac = 107,639.104167 ft²
1 square mile
640 ac = 2.58998811 km² = 27,878,400 ft²
1 square kilometer
100 ha = 247.105381 ac = 0.38610216 mi²
1 square meter
10.76391042 ft² = 1.19599005 yd²
1 square yard
9 ft² = 1,296 in² = 0.83612736 m²
1 square foot
144 in² = 0.09290304 m²
1 square inch
6.4516 cm² = 645.16 mm²
1 are
100 m² = 1,076.39104167 ft²
This is the international acre. The US survey acre is about 0.0004% bigger, a difference of only about 0.17 ft², so it does not matter for everyday use.
About Area Conversion
Type an area in either box, choose the units, and the other box updates at once. It covers 11 units, from square millimeters to square miles, plus acres and hectares. Your numbers never leave your browser.
Use this free area converter to change an area between square millimeters, square centimeters, square meters, ares, hectares, square kilometers, square inches, square feet, square yards, acres and square miles. Type a number in either box and the other one follows as you type, with the same area in the main units shown underneath. Pick how many decimals to round to, swap the two units with one click, and copy a link to your conversion. Charts list the most searched values for square feet to acres, acres to square feet, square meters to square feet and hectares to acres, plus an area conversion table, fractions of an acre and the answers to how many square feet are in an acre. It is free and instant, and your numbers stay in your browser.
How to convert square feet to acres
Divide the square feet by 43,560, because one acre is exactly 43,560 square feet.
acres = square feet ÷ 43,560
For 10,000 ft²: 10,000 ÷ 43,560 = 0.22957 acres. For 5,000 ft² it is 0.11478 acres, and a lot of 43,560 ft² is exactly 1 acre.
How to convert acres to square feet
Multiply the acres by 43,560: square feet = acres × 43,560. For 0.25 acres: 0.25 × 43,560 = 10,890 ft². For 2 acres it is 87,120 ft². An acre is also 4,840 square yards.
How to convert square meters to square feet
Multiply the square meters by 10.7639104: ft² = m² × 10.7639104. For 100 m²: 1,076.39 ft². To go back, multiply the square feet by 0.09290304: 500 ft² is 46.4515 m².
Hectares and acres
A hectare is 10,000 square meters, which is 2.4710538 acres. An acre is 0.40468564 hectares, or 4,046.8564224 m². So 2.5 hectares is exactly 25,000 m², or about 6.1776 acres.
Square yards and square inches
Area is length times width, so a square yard is 3 × 3 = 9 square feet, and a square foot is 12 × 12 = 144 square inches. One square meter is 1.19599 square yards.
Square miles and square kilometers
A square mile is 640 acres, which is 2.58999 square kilometers, or 258.9988 hectares. One square kilometer is 100 hectares, 247.105 acres, or 0.386102 square miles.
How big is an acre?
An acre is 43,560 square feet. If it were a square, each side would be about 208.7 feet, or 63.6 meters. Acres are used for land in the United States and the UK, and hectares in most other countries.
Why the units are exact
The inch is defined as exactly 25.4 mm, the foot as 0.3048 m and the acre as exactly 4,046.8564224 m², so every conversion here is exact, and the converter shows as many digits as you ask for. This is the international acre. The older US survey acre is about 0.0004% bigger, which is only about 0.17 square feet in an acre, so it does not matter for everyday use.
Exactly 43,560 square feet. An acre is also 4,840 square yards, 4,046.8564224 square meters, or 0.40468564 hectares.
How do I convert square feet to acres?
Divide the square feet by 43,560. For example, 10,000 ft² is 0.22957 acres and 5,000 ft² is 0.11478 acres.
How do I convert acres to square feet?
Multiply the acres by 43,560. For example, 0.25 acres is 10,890 ft² and 2 acres is 87,120 ft².
How many square feet are in a square meter?
10.7639104 square feet. So a 20 m² room is about 215.28 ft², and 100 m² is 1,076.39 ft².
How do I convert square feet to square meters?
Multiply the square feet by 0.09290304. For example, 500 ft² is 46.4515 m². This is exact, because a foot is exactly 0.3048 m.
How many acres are in a hectare?
2.4710538 acres. A hectare is 10,000 square meters, and an acre is 0.40468564 hectares.
How do I convert hectares to square meters?
Multiply the hectares by 10,000. For example, 2.5 hectares is 25,000 m².
How many acres are in a square mile?
640 acres. A square mile is also 2.58999 square kilometers, or 258.9988 hectares.
How many square yards are in an acre?
4,840 square yards. An acre is 43,560 square feet and a square yard is 9 square feet.
Why is a square yard 9 square feet and not 3?
Area is length times width. A yard is 3 feet long, so a square yard is 3 × 3 = 9 square feet. In the same way a square foot is 12 × 12 = 144 square inches.
How many square feet are in a square yard, and how many square yards in a square meter?
A square yard is 9 square feet. A square meter is 1.19599 square yards.
How many square inches are in a square foot?
144 square inches. A square inch is exactly 6.4516 square centimeters.
How big is a quarter acre?
A quarter acre is 10,890 square feet, which is 1,011.7141 square meters or 0.1011714 hectares.
Is the US survey acre different?
Slightly. This converter uses the international acre (exactly 4,046.8564224 m²). The older US survey acre is about 0.0004% bigger, which is only about 0.17 square feet in an acre.
How accurate is this converter?
Every unit is defined from the meter, so the factors are exact. The converter works to many digits and you choose how many decimals to show. Very large or very small answers are shown in powers of ten.
Are my numbers saved or shared?
No. The conversion happens in your browser, and the numbers you type are not stored or sent to any server. A link you copy keeps the numbers after the # sign, which browsers never send to a server.
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