Acres Conversion

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

The acre 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 acres.

Acre Conversion Calculators

Choose a unit of area to convert to.

US Customary
Convert acres to square miles
1 acre is equal to 0.001563 square miles
Convert acres to square yards
1 acre is equal to 4,840 square yards
Convert acres to square feet
1 acre is equal to 43,560 square feet
Convert acres to square inches
1 acre is equal to 6,272,640 square inches
SI Units
Convert acres to square kilometers
1 acre is equal to 0.004047 square kilometers
Convert acres to square meters
1 acre is equal to 4,047 square meters
Convert acres to square centimeters
1 acre is equal to 40,468,564 square centimeters
Convert acres to square millimeters
1 acre is equal to 4,046,856,422 square millimeters
Other Metric Units
Convert acres to hectares
1 acre is equal to 0.404686 hectares
Convert acres to ares
1 acre is equal to 40.468564 ares

Acre Definition and Usage

One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains. That's equal to 43,560 square feet for those unfamiliar with those units of measure.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as ac, for example 1 acre can be written as 1 ac.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

Background and Origin

The acre originated as a unit of measurement to define the area of a field that could be plowed in a single day with a yolk of oxen. The word was derived from the Middle English "aker."

Uses

The acre is generally used to measure parcels of land. It's used primarily in the United States, United Kingdom, and several former Commonwealth countries.

Acres Measurement Conversion Table

Common acre values and equivalent imperial and metric area measurements
acres square miles square yards square feet square inches square kilometers square meters square centimeters square millimeters hectares ares
1 ac 0.001563 sq mi 4,840 sq yd 43,560 sq ft 6,272,640 sq in 0.004047 sq km 4,047 sq m 40,468,564 sq cm 4,046,856,422 sq mm 0.404686 ha 40.468564 a
2 ac 0.003125 sq mi 9,680 sq yd 87,120 sq ft 12,545,280 sq in 0.008094 sq km 8,094 sq m 80,937,128 sq cm 8,093,712,845 sq mm 0.809371 ha 80.937128 a
3 ac 0.004688 sq mi 14,520 sq yd 130,680 sq ft 18,817,920 sq in 0.012141 sq km 12,141 sq m 121,405,693 sq cm 12,140,569,267 sq mm 1.214057 ha 121.405693 a
4 ac 0.00625 sq mi 19,360 sq yd 174,240 sq ft 25,090,560 sq in 0.016187 sq km 16,187 sq m 161,874,257 sq cm 16,187,425,690 sq mm 1.618743 ha 161.874257 a
5 ac 0.007813 sq mi 24,200 sq yd 217,800 sq ft 31,363,200 sq in 0.020234 sq km 20,234 sq m 202,342,821 sq cm 20,234,282,112 sq mm 2.023428 ha 202.342821 a
6 ac 0.009375 sq mi 29,040 sq yd 261,360 sq ft 37,635,840 sq in 0.024281 sq km 24,281 sq m 242,811,385 sq cm 24,281,138,534 sq mm 2.428114 ha 242.811385 a
7 ac 0.010938 sq mi 33,880 sq yd 304,920 sq ft 43,908,480 sq in 0.028328 sq km 28,328 sq m 283,279,950 sq cm 28,327,994,957 sq mm 2.832799 ha 283.27995 a
8 ac 0.0125 sq mi 38,720 sq yd 348,480 sq ft 50,181,120 sq in 0.032375 sq km 32,375 sq m 323,748,514 sq cm 32,374,851,379 sq mm 3.237485 ha 323.748514 a
9 ac 0.014063 sq mi 43,560 sq yd 392,040 sq ft 56,453,760 sq in 0.036422 sq km 36,422 sq m 364,217,078 sq cm 36,421,707,802 sq mm 3.642171 ha 364.217078 a
10 ac 0.015625 sq mi 48,400 sq yd 435,600 sq ft 62,726,400 sq in 0.040469 sq km 40,469 sq m 404,685,642 sq cm 40,468,564,224 sq mm 4.046856 ha 404.685642 a
11 ac 0.017188 sq mi 53,240 sq yd 479,160 sq ft 68,999,040 sq in 0.044515 sq km 44,515 sq m 445,154,206 sq cm 44,515,420,646 sq mm 4.451542 ha 445.154206 a
12 ac 0.01875 sq mi 58,080 sq yd 522,720 sq ft 75,271,680 sq in 0.048562 sq km 48,562 sq m 485,622,771 sq cm 48,562,277,069 sq mm 4.856228 ha 485.622771 a
13 ac 0.020313 sq mi 62,920 sq yd 566,280 sq ft 81,544,320 sq in 0.052609 sq km 52,609 sq m 526,091,335 sq cm 52,609,133,491 sq mm 5.260913 ha 526.091335 a
14 ac 0.021875 sq mi 67,760 sq yd 609,840 sq ft 87,816,960 sq in 0.056656 sq km 56,656 sq m 566,559,899 sq cm 56,655,989,914 sq mm 5.665599 ha 566.559899 a
15 ac 0.023438 sq mi 72,600 sq yd 653,400 sq ft 94,089,600 sq in 0.060703 sq km 60,703 sq m 607,028,463 sq cm 60,702,846,336 sq mm 6.070285 ha 607.028463 a
16 ac 0.025 sq mi 77,440 sq yd 696,960 sq ft 100,362,240 sq in 0.06475 sq km 64,750 sq m 647,497,028 sq cm 64,749,702,758 sq mm 6.47497 ha 647.497028 a
17 ac 0.026563 sq mi 82,280 sq yd 740,520 sq ft 106,634,880 sq in 0.068797 sq km 68,797 sq m 687,965,592 sq cm 68,796,559,181 sq mm 6.879656 ha 687.965592 a
18 ac 0.028125 sq mi 87,120 sq yd 784,080 sq ft 112,907,520 sq in 0.072843 sq km 72,843 sq m 728,434,156 sq cm 72,843,415,603 sq mm 7.284342 ha 728.434156 a
19 ac 0.029688 sq mi 91,960 sq yd 827,640 sq ft 119,180,160 sq in 0.07689 sq km 76,890 sq m 768,902,720 sq cm 76,890,272,026 sq mm 7.689027 ha 768.90272 a
20 ac 0.03125 sq mi 96,800 sq yd 871,200 sq ft 125,452,800 sq in 0.080937 sq km 80,937 sq m 809,371,284 sq cm 80,937,128,448 sq mm 8.093713 ha 809.371284 a

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.