Area Converter

The Area Converter instantly converts between common area units including square meters, square feet, square yards, acres, and hectares. Area conversion factors aren't independently chosen numbers — they're the corresponding length factor squared, since area scales with the square of distance: 1 square foot converts to exactly 0.3048² = 0.09290304 square meters, not a separately rounded constant. That's why acres and hectares, which trace back to square feet and square meters respectively, convert to a long, non-round decimal (1 acre ≈ 0.404686 hectares) rather than a clean ratio — the underlying linear units (feet and meters) were never designed to align.

Beginner⏱ 30 secondsUpdated 2026-10-28

Enter your details above and click “Convert Area” to see your results here.

How This Tool Works

Enter a value and choose your source and target area units for an instant conversion.

Formula & Method

All units convert through square meters as a common base, e.g., 1 acre = 4,046.86 square meters.

Example Calculation

500 square feet converts to square meters by multiplying by the exact factor 0.09290304 (0.3048²): 500 × 0.09290304 = 46.45152 m² — about the size of a small studio apartment. Going the other direction, a 2-acre lot converts to square feet using the defining relationship 1 acre = 43,560 sq ft: 2 × 43,560 = 87,120 sq ft, which converts to hectares as 2 × 0.40468564224 ≈ 0.809 hectares.

Please note: This calculator provides estimates for general informational purposes only. Results may not be accurate for every situation — use your judgment and consult a relevant professional when it matters.

About the Area Converter

Area is where the gap between metric and imperial systems causes the most expensive confusion. Homes in the United States are advertised in square feet, apartments in much of the world in square meters, farmland in acres or hectares, and country sizes in square miles or square kilometers. This converter handles nine units, square inches, square centimeters, square meters, square feet, square yards, square kilometers, square miles, acres and hectares, and restates a single area in whichever one you need to compare with.

The calculation routes everything through square meters. A square foot is exactly 0.09290304 square meters because it is 0.3048 meters squared, a square yard is 9 square feet, an acre is 43,560 square feet, a hectare is 10,000 square meters and a square mile is 640 acres. Since each factor follows from an exact length definition, the conversion adds no error of its own, and the displayed answer is simply rounded to at most six decimal places with thousands separators.

It suits buyers and renters comparing floor plans across countries, gardeners and landscapers sizing lawns, farmers and land investors reading plot descriptions, students working through geography or physics problems, and anyone ordering flooring, paint or turf. It converts one area figure at a time. If you only know a rectangle's length and width, multiply them in the same unit first, because the tool does not accept dimensions, only an area.

When to Use It

Comparing apartments across countries

A professional relocating from Chicago to Berlin sees a listing for 85 square meters and wonders if it matches the 900 square foot apartment he has now. Converting gives about 915 square feet, so the new place is slightly larger, which helps him decide how much furniture to ship.

Reading a rural land listing

A buyer looking at a farm advertised as 12.5 acres wants to compare it to a European parcel described in hectares. After converting, she sees about 5.06 hectares and can check the figure against local per-hectare prices, rent levels and crop-yield statistics before she makes an offer.

Ordering flooring or turf

A homeowner measures a room and gets 1,850 square feet across the whole floor, but the supplier's catalog quotes coverage per pack in square meters. She converts the total, adds a margin for cuts and waste, and divides by the pack coverage to get a whole number of boxes.

Sizing a city, park or lake for a report

A student writing about a regional park finds one source in square miles and another in square kilometers. Converting 2.5 square miles shows it is about 6.5 square kilometers and 1,600 acres, so the sources agree and she can quote whichever unit her audience expects.

How to Use It, Step by Step

Work out the total area first. If you have a rectangle, multiply length by width in one unit, such as feet times feet, to get square feet; for an irregular space, split it into rectangles and add them.
Enter that total in the Value field. It accepts values from zero to one billion and decimals, so 0.75 or 1,850 are both fine, and you can leave out the thousands comma when typing.
Choose your starting unit in the From list. The options are Square inches, Square centimeters, Square meters, Square feet, Square yards, Square kilometers, Square miles, Acres and Hectares, and the page opens with Acres selected.
Choose the unit you want in the To list, which starts on Square feet. For comparing with a metric listing, select Square meters or Hectares; for a US land listing, pick Acres.
Press the Convert Area button. The summary uses short labels, such as sq feet and sq meters, and the highlighted In box shows the converted figure for your target unit.
Check the unit labels in the summary before copying the number. A figure that reads 'sq meters' should be pasted into a metric document, and a mix-up between square meters and square feet is a tenfold error.
Round the answer to match your measurement. A floor measured with a tape is good to about a square foot, a surveyed lot to a hundredth of an acre, and the six decimals shown are more than either needs.
For ordering materials, convert the final area into the supplier's unit, then add an allowance for waste before buying, since the converted figure is net area only.

Understanding Your Results

The result is the same patch of ground or floor expressed in the other unit. It is a quantity of surface, not a shape, so a converted 171.870624 square meters could be a long hallway or a nearly square room. Keep the original dimensions with the converted number so that anyone reading your notes can see what the area is made of.

Test the answer against known ratios. One square meter is about 10.764 square feet, so a result in square feet should be roughly eleven times your square meters. One acre is 43,560 square feet or 4,840 square yards, a hectare is about 2.471 acres, and a square mile holds 640 acres. If your answer is off by a factor of 9, 144 or 43,560, a unit selection is likely reversed.

Decide how to use the figure. For prices or taxes quoted per unit, keep to the unit given by the source and convert the rate as well. For fitting furniture or planning planting, use the net area, then include allowance for waste, access paths and setbacks. Official records, deeds and zoning limits are written in specific units and rounding that should be followed exactly.

More Worked Examples

A 1,850 square foot house in square meters

Scenario: Value 1850, From Square feet, To Square meters.

One square foot is 0.09290304 square meters, so the tool multiplies 1,850 by that factor and returns 171.870624 square meters. In a listing this would be written as roughly 172 square meters. The same house is about 205.6 square yards, since a square yard is 9 square feet. A metric buyer can use the 172 figure to compare with floor areas that exclude garages, basements and walls, which are counted differently in different markets.

A 12.5 acre farm in hectares

Scenario: Value 12.5, From Acres, To Hectares.

An acre is 4,046.8564224 square meters, or 0.40468564 hectare. Multiplying 12.5 by that gives 5.058571 hectares, which is the figure the tool returns. Rounded for a conversation, the farm is about 5.06 hectares or roughly 544,500 square feet. To use per-hectare yields or rents from a metric source, multiply them by 5.06 and not by 12.5, because the unit changes the count.

A 2.5 square mile park in acres and square kilometers

Scenario: Value 2.5, From Square miles, To Acres, then To Square kilometers.

A square mile contains exactly 640 acres, so 2.5 square miles is 1,600 acres, and the tool returns 1,600. Changing the To list to Square kilometers returns 6.47497, because a square mile is 2.589988 square kilometers. Both forms are useful: acres are common for park and farm descriptions in the US, while square kilometers are the usual unit in international statistics, and quoting both avoids confusion.

Tips for Better Results

Always multiply dimensions in a single unit before converting. A room of 12 feet by 15 feet is 180 square feet, and converting that one number is more reliable than converting each side and multiplying again.
Memorize 10.76 for meters to feet and 0.0929 for feet to meters. A quick estimate with those factors will confirm that the tool's answer is in the right range.
When buying flooring, tile or turf, add an allowance to the net area for cuts and mistakes. Suppliers often suggest between about 5 and 15 percent depending on pattern and room shape; ask the supplier for the figure they use.
For land, check which acre is meant. The tool uses the international acre of exactly 43,560 square feet, which matches normal use, though surveying documents in some places refer to a very slightly different survey measure.
Hectares make large land areas easier to read. A square 100 meters on each side is exactly one hectare, so you can imagine a hectare as a block of 100 meters by 100 meters.
Write both units in contracts or notes when you can. A line such as 5.06 hectares (12.5 acres) lets both parties check the figure and catches typos before they become disputes.

Common Mistakes to Avoid

Using the length factor on an area. A meter is 3.28 feet, but a square meter is 10.76 square feet, because both dimensions scale. Use the area unit in the tool instead of multiplying by 3.28.
Mixing up 'square meters' with 'meters by meters'. A room that is 3 by 4 meters has 12 square meters, but a '3 square meter' space is not 3 meters on each side; it is about 1.7 meters on each side.
Choosing acres when you meant square feet, or the reverse. The page opens on Acres to Square feet, so read the From list before you press the button.
Counting gross area when the listing uses net. Garage, balcony, wall thickness and basement may or may not be included in the figure, so a converted number is only as comparable as the original definition.
Rounding too hard in one direction. Rounding 5.058571 hectares down to 5 hectares looks harmless, but on a per-hectare price it changes the value of the land by over one percent, so keep two or three decimals for money.

Assumptions and Limits

The tool uses exact length-based factors: 1 square foot is 0.3048 meters squared, 1 acre is 43,560 square feet and 1 square mile is 640 acres. These match international definitions, and the answer is rounded to six decimal places for display.
The acre used is the international acre. A very slightly different US survey acre exists in older land records, but the difference is about two parts per million and is not relevant to everyday decisions.
The converter changes the unit of an area, not its meaning. It does not know whether a listing counts walls, balconies or shared areas, and it cannot tell you the shape of a space.
For deeds, tax assessments, building permits or boundary disputes, rely on the documents and surveyors responsible for the property, and do not substitute a converted number from a general tool.

Key Terms

Acre: A land unit equal to 43,560 square feet, 4,840 square yards or about 4,047 square meters. There are 640 acres in a square mile.
Hectare: A metric land unit equal to 10,000 square meters, the area of a square 100 meters on each side. It equals about 2.471 acres.
Square unit: A measure of surface equal to a square whose sides are one length unit long. Because it has two dimensions, converting it uses the length factor squared.
Net area: The usable surface after deductions such as walls, stairwells or unusable corners. It is usually smaller than the gross area, which includes them.
Square yard: An area equal to 9 square feet, being 3 feet by 3 feet. It is still used for carpet, turf and fabric in the US and some other markets.
Waste allowance: Extra material bought beyond the measured area to cover cuts, pattern matching and breakage. It is added after conversion, not before.

Related guides

How to convert between metric and imperial units

Frequently Asked Questions

How many square feet are in an acre?+

One acre equals 43,560 square feet.

What is a hectare?+

A hectare is a metric unit of area equal to 10,000 square meters, or about 2.47 acres — commonly used internationally for land measurement.

How do I convert a room's square footage to acres?+

Enter your square footage, choose "square feet" as the source unit and "acres" as the target — useful mainly for large properties rather than individual rooms.

Why is an acre exactly 43,560 square feet instead of a round number?+

An acre traces back to a medieval English field measurement — the area a team of oxen could plow in a day — standardized as 1 chain (66 feet) × 1 furlong (660 feet) = 43,560 square feet. That historical origin, not a metric or decimal design, is why the acre-to-hectare conversion (1 acre ≈ 0.404686 hectares) comes out as a long, non-round decimal.

What's a quick way to convert square meters to square feet in my head?+

Multiply by about 10.76 (precisely 1 ÷ 0.09290304 ≈ 10.7639). For example, a 50 sq m apartment is roughly 50 × 10.76 ≈ 538 sq ft — close enough for a quick estimate, though this calculator gives the exact figure.

How many acres are in a square mile?+

There are exactly 640 acres in a square mile, since a mile is 5,280 feet and 5,280 times 5,280 divided by 43,560 gives 640. That is why a quarter section of land in many US surveys is 160 acres. Enter 1 in the Square miles field and choose Acres to see it, and select Hectares to see that one square mile is about 259 hectares.

How do I find the acreage of a lot from its dimensions?+

Multiply the width by the depth in feet to get square feet, then convert that figure to acres. A lot 100 feet wide and 200 feet deep is 20,000 square feet, which the tool converts to 0.459137 acres. Use this method only for rectangles; for odd shapes, split the lot into rectangles and triangles, add the areas, and confirm against a survey.

How big is a hectare in real terms?+

A hectare is a square 100 meters on each side, which is 10,000 square meters or about 2.47 acres. For scale, an American football field, including both end zones, covers about 57,600 square feet, which the tool converts to roughly 1.32 acres. A hectare is therefore about 1.9 of those football fields.

How much extra flooring or paint area should I allow for?+

Convert your measured area first, then add a margin to cover cuts and mistakes. Many suppliers recommend somewhere around 5 to 15 percent for flooring, with the higher end for diagonal layouts, patterned materials or rooms with many corners. Paint coverage depends on the surface and product, so check the label for coverage per container and ask the supplier before you buy.

What is the difference between 4 square meters and 4 meters by 4 meters?+

They are very different. Four meters by four meters is 16 square meters because you multiply the sides. Four square meters is a total surface of 4 and could be a 2 by 2 meter square or a 1 by 4 meter strip. When you read dimensions in a listing or plan, check which of the two is meant before you enter a number in the Value field.

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