Area Converter – Square Meters, Square Feet, Acres, Hectares & More
Free online area unit converter. Instantly convert between m², ft², km², cm², mm², acres, hectares, square yards, square inches, and square miles.
Input Area Value
Converted Result
Quick Area Conversion Reference Table
The table below lists the most frequently searched area conversions - bookmark this page for instant reference whenever you need to convert square meters to square feet, acres to hectares, or any other common area unit.
| From | To | Multiply By | Example |
|---|---|---|---|
| Square Meters (m²) | Square Feet (ft²) | 10.7639 | 10 m² = 107.639 ft² |
| Square Feet (ft²) | Square Meters (m²) | 0.092903 | 100 ft² = 9.2903 m² |
| Acres (ac) | Hectares (ha) | 0.404686 | 5 ac = 2.02343 ha |
| Hectares (ha) | Acres (ac) | 2.47105 | 1 ha = 2.47105 ac |
| Square Kilometers (km²) | Square Miles (mi²) | 0.386102 | 10 km² = 3.86102 mi² |
| Square Miles (mi²) | Square Kilometers (km²) | 2.58999 | 1 mi² = 2.58999 km² |
| Acres (ac) | Square Feet (ft²) | 43,560 | 1 ac = 43,560 ft² |
| Acres (ac) | Square Meters (m²) | 4,046.86 | 2 ac = 8,093.71 m² |
| Hectares (ha) | Square Meters (m²) | 10,000 | 3 ha = 30,000 m² |
| Square Yards (yd²) | Square Meters (m²) | 0.836127 | 50 yd² = 41.806 m² |
| Square Inches (in²) | Square Centimeters (cm²) | 6.4516 | 144 in² = 929.03 cm² |
| Square Feet (ft²) | Square Yards (yd²) | 0.111111 | 9 ft² = 1 yd² |
What Is an Area Converter?
An area converter is an online tool that lets you instantly convert a measurement of surface area from one unit to another - for example, converting square meters to square feet, acres to hectares, or square kilometers to square miles. Instead of manually applying conversion formulas, you simply enter a number, choose your starting unit and target unit, and get an accurate result in real time.
Area is a two-dimensional measurement: it tells you how much flat surface a shape, plot of land, or floor covers. Because the world uses two major measurement systems - the metric system (square meters, hectares, square kilometers) and the imperial / US customary system (square feet, acres, square miles) - area unit conversions are needed constantly in real estate, agriculture, construction, architecture, engineering, geography, and everyday life.
Our free area converter supports ten of the most widely used area units: square meters (m²), square kilometers (km²), square centimeters (cm²), square millimeters (mm²), square feet (ft²), square yards (yd²), square inches (in²), acres (ac), hectares (ha), and square miles (mi²). All calculations use the internationally recognised conversion factors defined by NIST (National Institute of Standards and Technology) and the SI (International System of Units).
How to Use the Area Converter – Step by Step
Using this area unit converter takes less than ten seconds:
- Enter your area value in the input field. The tool accepts whole numbers, decimals, and very large or small values (up to 10¹⁵).
- Select the "From" unit - choose the unit your original measurement is in, for example Square Feet or Acres.
- Select the "To" unit - choose the unit you want to convert into, such as Square Meters or Hectares.
- Read the result instantly - conversion happens in real time as you type, with no need to click a button.
- Copy the result using the copy button, or use the Swap Units button to instantly reverse the conversion direction.
- Clear all fields with the Clear button to start a new conversion.
The converter also remembers your last-used units and input value across sessions using browser storage, so you do not have to re-select units every time you visit.
Metric Area Units Explained
Square Meter (m²) - The SI Base Unit
The square meter is the official SI unit of area and the most widely used metric area unit in the world. One square meter is the area of a square whose sides are each exactly one meter long. It is used for measuring rooms, apartments, offices, and small land parcels. A standard parking space is roughly 14–15 m²; a typical studio apartment might be 30–50 m². To convert square meters to square feet, multiply by 10.7639. To convert square meters to acres, divide by 4,046.86.
Square Kilometer (km²)
One square kilometer equals 1,000,000 m² (one million square meters). It is used for measuring cities, national parks, lakes, and countries. For example, the city of Paris covers about 105 km². To convert square kilometers to square miles, multiply by 0.386102. To convert to acres, multiply by 247.105.
Hectare (ha) - The Standard for Land Area
The hectare is the dominant unit for measuring agricultural land worldwide. One hectare equals exactly 10,000 square meters - the area of a square 100 m × 100 m. It is roughly the size of a large city block or two American football fields. One hectare equals 2.47105 acres. The unit was introduced with the metric system in 1795 and is used globally for farm fields, forest areas, parks, and land registry records.
Converting hectares to acres: multiply by 2.47105. Converting acres to hectares: multiply by 0.404686.
Square Centimeter (cm²) and Square Millimeter (mm²)
Square centimeters (1 cm² = 0.0001 m²) are used for small objects - book covers, screens, tiles, and fabric swatches. Square millimeters (1 mm² = 0.000001 m²) appear in technical contexts such as material cross-sections and micro-chip dimensions. To convert cm² to in², multiply by 0.155.
Imperial & US Customary Area Units Explained
Square Foot (ft²) - The US Standard for Indoor Space
The square foot is the primary unit for measuring floor area in the United States, Canada, and the United Kingdom. One square foot equals 0.092903 m² or 144 square inches. Real estate listings in the US almost always list property size in square feet. A typical US single-family home is 1,500–2,500 ft² (139–232 m²). Converting square feet to square meters is one of the most common area conversions globally - multiply ft² by 0.092903, or divide by 10.7639.
Acre (ac) - The Standard for Land Area in the US & UK
The acre is the standard unit for measuring plots of land in the United States, United Kingdom, Canada, and several other countries. One acre equals exactly 43,560 square feet or approximately 4,046.86 square meters. It is roughly 76% the size of an American football field (including end zones). The word "acre" comes from Old English and the unit was originally defined as the land a yoke of oxen could plough in one day - a strip roughly 40 rods long and 4 rods wide.
Common acre conversions: 1 acre = 43,560 ft² = 4,046.86 m² = 0.404686 ha = 0.0015625 mi². A quarter-acre lot (common in suburban US) is 10,890 ft² or about 1,011 m².
Square Yard (yd²)
One square yard equals 9 square feet or 0.836127 m². Square yards are commonly used for measuring carpet, fabric, turf, and paving materials. To convert square yards to square meters, multiply by 0.836127. To convert to square feet, multiply by 9.
Square Inch (in²)
One square inch equals 6.4516 cm² or 0.00064516 m². Square inches are used for small surface measurements - tile sizes, screen dimensions (though screen sizes are typically measured diagonally in linear inches), and print area. There are 144 square inches in a square foot.
Square Mile (mi²)
One square mile equals 640 acres, 2.58999 km², or 27,878,400 ft². It is the standard large-area unit in the US for measuring counties, cities, and geographic regions. Converting square miles to square kilometers: multiply by 2.58999. Converting to acres: multiply by 640.
Most Common Area Conversions - In-Depth Guide
How to Convert Square Meters to Square Feet (m² to ft²)
This is the single most searched area conversion query worldwide, driven by international real estate and construction. To convert square meters to square feet, multiply the number of square meters by 10.7639104.
Example: 50 m² × 10.7639 = 538.196 ft²
Conversely, to convert square feet to square meters, multiply by 0.09290304.
How to Convert Acres to Hectares (ac to ha)
Essential for agriculture, land sales, and international property transactions. To convert acres to hectares, multiply by 0.40468564.
Example: 10 ac × 0.40469 = 4.0469 ha
To convert hectares to acres, multiply by 2.47105381. So 5 hectares = 12.355 acres.
How to Convert Square Feet to Acres (ft² to ac)
Real estate agents and land developers frequently need this conversion. To convert square feet to acres, divide by 43,560.
Example: 87,120 ft² ÷ 43,560 = 2 acres
How to Convert Acres to Square Meters (ac to m²)
Useful for land plans that require metric precision. Multiply acres by 4,046.8564.
Example: 3 ac × 4,046.86 = 12,140.57 m²
How to Convert Hectares to Square Meters (ha to m²)
Straightforward: 1 hectare = exactly 10,000 m². Multiply hectares by 10,000.
Example: 7.5 ha × 10,000 = 75,000 m²
How to Convert Square Kilometers to Square Miles (km² to mi²)
Frequently needed for geography, maps, and country/city area comparisons. Multiply km² by 0.38610216.
Example: 100 km² × 0.386102 = 38.6102 mi²
Real-World Uses of Area Conversion
Area conversions are needed across dozens of professional fields and everyday situations. Here are the most common real-world use cases:
🏠 Real Estate & Property
Buyers and sellers frequently need to convert square feet to square meters when comparing international property listings. A US listing showing 2,000 ft² equals 185.8 m² - a figure more familiar to buyers in Europe, Asia, or Australia. Similarly, land parcels are described in acres in the US but in hectares in most other countries, making acres to hectares conversion essential for cross-border transactions.
🌾 Agriculture & Farming
Farmers, agronomists, and agricultural planners work with both acres (US/UK) and hectares (global metric standard). Crop yield data published in kg/hectare must be converted to pounds/acre for US farmers. Government subsidy programs and land registry databases often use different units depending on the country, making reliable acre to hectare conversion critical for accurate farm management.
🏗️ Architecture & Construction
Architects and contractors convert between area units constantly - floor plans drafted in ft² need metric equivalents for material procurement in countries using m². Tile, carpet, flooring, roofing, and paint coverage are all measured and sold using area units. Knowing that 1 square meter = 10.764 square feet is fundamental to accurate material estimation and cost calculation.
🗺️ Geography & Cartography
Geographers and map-makers need to compare areas of countries, cities, lakes, forests, and national parks across different measurement systems. US government publications often list areas in square miles, while international reports use km². Converting between these units accurately is important for environmental reporting, urban planning, and comparative statistics.
📐 Engineering & Manufacturing
Engineers working on international projects deal with imperial drawings (square feet, square yards) alongside metric specifications (m², cm²). Cross-sectional areas in structural engineering, material surface areas in manufacturing, and heat transfer calculations in thermodynamics all require precise area unit conversions, often between mm² and in² or cm² and ft².
🎓 Education & Mathematics
Students in geometry, trigonometry, and physics courses regularly encounter area problems in both metric and imperial units. Teachers and textbook authors use area converters to verify answers across unit systems. Common exam questions involving square meter to square foot or hectare to acre conversions are much easier to check with an instant online tool.
Area Unit Size Comparison
To develop intuition for how different area units relate to each other, here is a size comparison from the smallest to largest supported unit:
| Unit | Equivalent in m² | Typical Use |
|---|---|---|
| Square Millimeter (mm²) | 0.000001 m² | Engineering, material cross-sections |
| Square Centimeter (cm²) | 0.0001 m² | Tiles, fabric swatches, small objects |
| Square Inch (in²) | 0.000645 m² | Screen size, print area, small components |
| Square Foot (ft²) | 0.0929 m² | Room size, US real estate floor plans |
| Square Yard (yd²) | 0.8361 m² | Carpet, turf, fabric by the yard |
| Square Meter (m²) | 1 m² | Rooms, apartments, international floor area |
| Acre (ac) | 4,046.86 m² | Land plots, US/UK real estate, farming |
| Hectare (ha) | 10,000 m² | Farms, forests, parks - global land area |
| Square Kilometer (km²) | 1,000,000 m² | Cities, regions, countries |
| Square Mile (mi²) | 2,589,988 m² | Counties, large geographic areas, US maps |
Metric vs. Imperial Area Units: Key Differences
The world is divided between two major measurement systems when it comes to area. Understanding which system is used where - and why - makes area conversions much easier to reason about.
The metric system, used by the vast majority of the world, is based on powers of ten. The base unit is the square meter (m²). Scaling up: 100 m² = 1 are (rarely used), 10,000 m² = 1 hectare (ha), 1,000,000 m² = 1 km². This decimal structure makes arithmetic straightforward. The metric system is the official system in all of Europe, Asia, South America, Africa, and Australia.
The imperial / US customary system, used primarily in the United States and to a lesser degree in the UK, uses units based on historical measures. The square foot (ft²) is the standard indoor unit, while the acre is the standard land unit. The relationships are less intuitive: 1 acre = 43,560 ft² = 4,840 yd² = 160 square rods. The United Kingdom largely uses metric for official purposes but acres and square feet remain common in real estate.
Because of this global split, the most critical area conversions in practice are m² ↔ ft² for property and construction, and acres ↔ hectares for agricultural land.
Frequently Asked Questions (FAQ)
How many square feet are in an acre?
There are exactly 43,560 square feet in one acre. This is a legally defined value. So a 2-acre plot contains 87,120 square feet.
How many square meters are in a hectare?
One hectare equals exactly 10,000 square meters. A hectare is the area of a square measuring 100 m × 100 m.
How do I convert square meters to square feet?
Multiply the number of square meters by 10.7639104. For example, 75 m² × 10.7639 = 807.29 ft². To go the other direction, multiply square feet by 0.09290304.
How many acres is a hectare?
One hectare equals 2.47105 acres. Conversely, one acre equals 0.404686 hectares.
What is bigger - an acre or a hectare?
A hectare is larger. One hectare = 2.471 acres, so a hectare is approximately two and a half times bigger than an acre.
How many square feet in a square meter?
One square meter equals 10.7639 square feet. Equivalently, 1 ft² = 0.092903 m².
How do I convert square kilometers to square miles?
Multiply square kilometers by 0.386102. For example, 500 km² = 193.05 mi². To convert square miles to km², multiply by 2.58999.
How many square feet are in a square yard?
One square yard equals 9 square feet. One square foot = 0.111111 square yards.
How accurate is this area converter?
All conversions use exact NIST-defined factors and are displayed to 6 decimal places. For the vast majority of real estate, agricultural, and engineering purposes, this precision is more than sufficient.
Does this tool work offline?
Yes. Once the page has loaded, all calculations run locally in your browser using JavaScript. No internet connection is required to perform conversions, and your data never leaves your device.
What is a square foot used for?
Square feet are the standard unit for measuring floor area in the United States and Canada - apartment sizes, house listings, office space, retail space, and construction estimates are all quoted in ft². It is also used for carpet, flooring, and tile material estimation.
What is a hectare used for?
Hectares are the standard land area unit in most of the world outside the US and UK. Farm sizes, national park areas, forest coverage, and urban land zones are commonly reported in hectares (ha) in Europe, Asia, Africa, and South America.
All Area Conversion Formulas at a Glance
All conversions below use the internationally standardized factors from the SI and NIST. The method for any conversion is: convert to square meters first using the "to m²" factor, then convert from square meters to the target unit by dividing by that unit's "to m²" factor.
Pro Tips for Accurate Area Conversions
1. Always double-check the source unit. A common mistake is confusing "square feet" with just "feet." Area is always a two-dimensional measurement (unit²). A room that is 10 ft × 12 ft has an area of 120 ft², not 120 ft.
2. Be careful with large land values. When dealing with hundreds of acres or thousands of hectares, small rounding errors in the conversion factor can produce significant discrepancies. Use the full precision factor (e.g., 0.40468564 for acres-to-hectares) rather than a rounded approximation like 0.4.
3. Remember that area scales by the square. If you double the side length of a square, you quadruple the area. This means converting between linear units (meters to feet) and area units requires squaring the linear factor. 1 m = 3.28084 ft, so 1 m² = 3.28084² = 10.7639 ft².
4. For flooring and materials, always add 10% buffer. When calculating material quantities for tiling or carpeting a room measured in m² or ft², add a 10% overage for cutting waste, irregularities, and future repairs.
5. Use the Swap button for bidirectional checks. After converting from m² to ft², use the Swap button and re-enter the ft² result to verify you get back the original m² value - a quick sanity check for critical calculations.
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