Area Converter
Convert between square meters, square feet, acres, hectares, and more. Instant area unit conversion with all common units.
Area Converter
Calculator
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Formula: Converted Value = Input × (From Factor / To Factor)
Worked example — 85 m² = 914.93 ft² (approximately 915 sq ft)
Formula
Converted Value = Input × (From Factor / To Factor)
Area conversion works by first converting the input to a base unit (square meters), then converting from the base unit to the desired output unit. Each unit has a conversion factor relative to square meters.
Worked Examples
Example 1: Property Size Conversion
Problem:A European property listing shows an apartment as 85 square meters. Convert to square feet for a US buyer.
Solution:1 m² = 10.7639 ft² 85 m² × 10.7639 = 914.93 ft² This is comparable to a typical US 2-bedroom apartment.
Result:85 m² = 914.93 ft² (approximately 915 sq ft)
Example 2: Farm Land Conversion
Problem:A farmer owns 250 acres of land. Convert this to hectares and square kilometers.
Solution:1 acre = 0.404686 hectares 250 acres × 0.404686 = 101.17 hectares 1 hectare = 0.01 km² 101.17 ha × 0.01 = 1.0117 km²
Result:250 acres = 101.17 hectares = 1.012 km²
Frequently Asked Questions
How do I convert between square meters and square feet?
To convert square meters to square feet, multiply the square meter value by 10.7639. To convert square feet to square meters, multiply by 0.0929 (or divide by 10.7639). For example, 100 square meters equals 1,076.39 square feet, and 1,000 square feet equals 92.90 square meters. This conversion is essential in real estate, where some countries list property sizes in square meters while others use square feet. Remember that area conversions use the square of the linear conversion factor: since 1 meter equals 3.28084 feet, 1 square meter equals 3.28084 squared, which is 10.7639 square feet. This is a common source of error when people try to convert areas using linear factors.
What is the difference between an acre and a hectare?
An acre is an imperial unit of area equal to 43,560 square feet or approximately 4,047 square meters. A hectare is a metric unit equal to 10,000 square meters or about 2.471 acres. One hectare is roughly 2.47 times larger than one acre. Historically, an acre was defined as the amount of land a yoke of oxen could plow in one day. Hectares are the standard unit for measuring land area in most countries worldwide, while acres remain common in the United States, United Kingdom, and other countries that historically used the imperial system. For quick mental conversion, you can remember that 1 hectare is roughly 2.5 acres, or that 1 acre is roughly 0.4 hectares, which is close enough for most estimation purposes.
How many square feet are in a square yard?
There are exactly 9 square feet in one square yard. This is because one yard equals 3 feet in linear measurement, and when you square that relationship (3 × 3 = 9), you get 9 square feet per square yard. This conversion is commonly used in flooring and carpet installation, where materials are often priced per square yard but rooms are measured in square feet. To convert square feet to square yards, divide by 9. For example, a room that is 180 square feet equals 20 square yards. Conversely, if carpet costs a certain amount per square yard, divide that price by 9 to get the price per square foot. This relationship is straightforward because both units belong to the imperial system, unlike cross-system conversions.
What are common area units used in real estate?
Real estate area measurements vary by country and region. In the United States, square feet is the primary unit for residential and commercial property, with acres used for land plots. In the United Kingdom, square feet and square meters are both used, with acres for larger parcels. In continental Europe, Australia, and most of Asia, square meters are standard for buildings and hectares for land. In Japan, the traditional unit 'tsubo' (approximately 3.3 square meters) is still commonly used alongside square meters. In India, square feet dominate residential listings, but 'bigha' and 'kanal' are traditional land units that vary by region. Understanding these differences is crucial when comparing international property listings or working with overseas buyers and sellers.
Why do area conversions use squared factors instead of linear ones?
Area conversions require squared factors because area is a two-dimensional measurement. When you convert a linear measurement, you multiply by the conversion factor once. But area involves two dimensions (length and width), so you must apply the conversion factor twice, which means squaring it. For example, 1 meter equals 3.28084 feet linearly. But 1 square meter is not 3.28084 square feet — it is 3.28084 × 3.28084 = 10.764 square feet. Think of it this way: a square that is 1 meter on each side has an area of 1 square meter. Converting each side to feet gives 3.28 feet × 3.28 feet = 10.76 square feet. This principle applies to all unit conversions involving area, and similarly, volume conversions use cubed factors for the same reason.
How many square feet are in an acre, and how do I convert a building lot?
One acre contains exactly 43,560 square feet, which is also 4,046.8564224 square meters. To convert a lot from square feet to acres, divide by 43,560: a 12,000 square foot lot is 12,000 / 43,560 = 0.2755 acres. To go the other way, multiply acres by 43,560. Residential zoning rules are often written in acres, such as quarter-acre or half-acre minimum lot sizes, while the plat or survey gives dimensions in feet, so this conversion comes up whenever you check a parcel against a minimum lot area requirement.
What is the difference between a square kilometer and a square mile?
A square kilometer is 1,000,000 square meters; a square mile is 2,589,988.11 square meters, or 640 acres. So one square mile equals about 2.59 square kilometers, and one square kilometer equals about 0.3861 square miles. The ratio is the square of the linear factor between miles and kilometers, since 1.609344 squared is 2.589988. These units appear in population density figures, watershed and catchment areas, and land-cover mapping, so mixing them up shifts a density figure by a factor of roughly 2.6.
Which area unit should I use when measuring a room for flooring?
Use the unit your supplier prices in, and measure in that system from the start rather than converting at the end. Carpet is frequently sold by the square yard, which is 9 square feet, while tile and laminate are sold by the square foot or square meter. Break an irregular room into rectangles, compute each area, then add them. Add a waste allowance on top of the converted figure for cuts, pattern matching and diagonal layouts, since the converted area is the finished surface, not the material you must buy.
Why does the converter route every value through square meters?
Square meters act as the base unit, so each supported unit needs only one stored factor relative to the square meter instead of a factor for every possible pair. The input is multiplied by its own factor to reach square meters, then divided by the target factor. With eleven units a pairwise table would need over a hundred coefficients, each a chance for a typo, whereas the pivot approach needs eleven and keeps rounding to a single intermediate step. That is why unit converters are almost always built this way.
What is the difference between gross floor area and net usable area in a listing?
Gross floor area is measured to the outer face of the exterior walls and includes structural walls, shafts and often shared circulation; net or carpet area counts only the usable floor inside the room walls. Because different countries and professional bodies draw that boundary differently, the same apartment can be advertised with noticeably different numbers. Converting square meters to square feet does not resolve the gap, so when comparing international listings check which measurement basis each figure uses before comparing converted values.
References
Background & Theory
1 square metre = 10.7639104 square feet, 1 acre = 4,046.8564224 m2 and 1 hectare = 10,000 m2 exactly. Area factors are the corresponding length factors squared, so the exact length definitions carry through: 1 sq ft is exactly 0.3048 squared, or 0.09290304 m2.
Conversion reference table
| Conversion | Equivalent | Exact or rounded? |
|---|---|---|
| 1 square foot | 0.09290304 square metres | Exact by definition |
| 1 square metre | 10.7639104 square feet | Derived, rounded |
| 1 square inch | 6.4516 square centimetres | Exact |
| 1 square yard | 0.83612736 square metres | Exact |
| 1 acre | 4,046.8564224 m2 = 43,560 sq ft | Exact |
| 1 hectare | 10,000 square metres = 2.47105381 acres | Exact / derived |
| 1 square mile | 2.589988110336 km2 = 640 acres | Exact |
| 1 are | 100 square metres | Exact |
Because area scales as the square of length, a one percent error in a linear measurement becomes roughly two percent in the area, and a three percent error becomes about six. That is why floor plans and land parcels should be converted once at the area level rather than converting each dimension separately and multiplying with rounded intermediates. The acre is the odd one out historically: it is one chain by one furlong, or 66 ft by 660 ft, which is where the awkward 43,560 comes from.
Reviewed for accuracy by Manoj Kumar, Mathematics Educator · Editorial policy
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