Area Converter

Free Online Area Converter

This area converter instantly converts between metric and imperial units of area, including square millimeters (mm²), square centimeters (cm²), square meters (m²), hectares (ha), square kilometers (km²), square inches (in²), square feet (ft²), square yards (yd²), acres, and square miles (mi²). It works as a square meter to square feet converter, acre to hectare converter, sq ft to sq m calculator, hectare to acre converter, and square inches to square centimeters converter all in one tool, so you never need to memorize a separate formula for every unit pair.

Whether you're a student solving geometry and mensuration problems, a real estate agent or property buyer comparing plot sizes listed in different units, a farmer converting field size from acres to hectares, an architect or civil engineer working across metric and imperial drawings, or a homeowner calculating flooring, tiling, or land area, this area conversion calculator gives you an instant, accurate result along with a visual diagram and complete step-by-step working.

How to Use This Area Conversion Calculator

Using this online area converter takes only three quick steps. Enter the numeric value you want to convert, choose the unit you're converting from in the "From" dropdown, and choose the unit you want to convert to in the "To" dropdown — the converted result updates instantly as you type. Use the swap button to instantly reverse the conversion direction, or tap one of the popular conversion shortcuts like m² to ft², acre to hectare, or km² to mi².

• Type the area value you want to convert
• Select the unit you're converting from (metric or imperial)
• Select the unit you want to convert to
• Read the converted area, the unit rate, and the visual conversion diagram

Area Conversion Formula

Every area conversion uses the square meter as a common base unit, since the square meter is the SI (International System of Units) standard for area. To convert any value from one unit to another, the calculator first multiplies the input by that unit's square-meter factor to get the area in square meters, then divides by the target unit's square-meter factor to reach the final answer.

• Step 1: Area in square meters = Input value × (square-meter factor of the "From" unit)
• Step 2: Result = Area in square meters ÷ (square-meter factor of the "To" unit)
• Combined formula: Result = Input value × (From unit's sq. m factor ÷ To unit's sq. m factor)
• Example shortcut: to convert square meters directly to square feet, multiply by 10.7639 (since 1 ft² = 0.09290304 m²)

Common Area Conversion Factors

These are the exact square-meter-based conversion factors this calculator uses internally. Knowing them is useful for quick mental estimates even when you don't have the calculator open:

• 1 square millimeter (mm²) = 0.000001 square meters
• 1 square centimeter (cm²) = 0.0001 square meters
• 1 square meter (m²) = 1 square meter (the base unit)
• 1 hectare (ha) = 10,000 square meters
• 1 square kilometer (km²) = 1,000,000 square meters
• 1 square inch (in²) = 0.00064516 square meters
• 1 square foot (ft²) = 0.09290304 square meters
• 1 square yard (yd²) = 0.83612736 square meters
• 1 acre = 4,046.8564224 square meters ≈ 0.404686 hectares
• 1 square mile (mi²) = 2,589,988.110336 square meters ≈ 258.999 hectares

Worked Example: Square Feet to Square Meters

Suppose you want to convert a 1,000 square foot apartment into square meters. First, look up the conversion factor: 1 square foot equals 0.09290304 square meters. Multiplying, 1,000 ft² × 0.09290304 = 92.90304 square meters. So a 1,000 sq ft apartment equals roughly 92.9 square meters — exactly what the diagram above shows when you enter 1000 in the "From: Square Foot" field and select "To: Square Meter".

Now try a real-estate example in the reverse direction: converting a 2-hectare farm plot into acres. Since 1 acre equals 0.4046856 hectares, you divide instead of multiply: 2 ha ÷ 0.4046856 = 4.9421 acres. This two-step "convert to the base unit, then convert out" method is exactly what powers every conversion this calculator performs, no matter which two area units you choose.

Metric vs Imperial Area Units

The metric system (square millimeters, square centimeters, square meters, hectares, square kilometers) is used by nearly every country in the world and scales in powers of 10 for linear units, though the squared relationship means area factors scale in powers of 100 or more. The imperial and US customary system (square inches, square feet, square yards, acres, square miles) is still widely used for real estate, land measurement, and construction in the United States, and for land area in parts of the UK and other countries.

Because these two systems don't share a simple round-number relationship, converting between them — such as square feet to square meters, acres to hectares, or square miles to square kilometers — normally requires a calculator or a memorized conversion factor. This tool removes that friction entirely by handling metric-to-imperial and imperial-to-metric area conversions with the same accuracy in both directions.

Where Area Conversion Is Used

Area conversion comes up constantly outside the classroom, in situations where surface measurements from two different systems need to be compared or combined:

• Real estate and property listings, comparing plot or apartment size in square feet, square meters, or hectares
• Agriculture and land management, converting farmland size between acres and hectares
• Construction and interior design, calculating flooring, tiling, painting, or carpet area
• Urban planning and surveying, standardizing land parcel measurements to a single unit system
• Geography and environmental science, expressing forest cover, lake surface, or region size in square kilometers or square miles
• Education, solving mensuration and geometry problems that mix metric and imperial units