Free Online Area Converter

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Area converter for every common metric and imperial unit — square millimeters, square centimeters, square meters, hectares, square kilometers, square inches, square feet, square yards, acres and square miles. Type a value on either side; the result updates instantly. Note that area scales as the square of length: 1 m² = 10,000 cm² (not 100). Everything runs in your browser — nothing is uploaded.

Supported units: Square millimeter (mm²), Square centimeter (cm²), Square meter (m²), Hectare (ha), Square kilometer (km²), Square inch (in²), Square foot (ft²), Square yard (yd²), Acre, Square mile (mi²).

Square meter (m²) → Square foot (ft²)

Quick reference table

Square meter (m²)Square foot (ft²)
1 m²10.7639 ft²
2 m²21.5278 ft²
5 m²53.8196 ft²
10 m²107.6391 ft²
25 m²269.0978 ft²
50 m²538.1955 ft²
100 m²1076.391 ft²

Why area scales as the square of length (1 m² = 10,000 cm², not 100)

The most common manual-conversion error in area is forgetting that area is a two-dimensional quantity. When you double a linear dimension you quadruple the area; when you scale length by 100×, area scales by 100² = 10,000×. So 1 m² = 10,000 cm² (not 100), 1 km² = 1,000,000 m² (not 1,000), and 1 ft² = 144 in² (not 12). This squared scaling applies to every metric/metric and imperial/imperial conversion in this tool. Cross-system factors come from the linear conversion squared: 1 m = 3.2808 ft, so 1 m² = 3.2808² ft² ≈ 10.764 ft². 1 km = 0.6214 mi, so 1 km² ≈ 0.3861 mi². The conversion factors in this tool are derived from the exact 1959 yard-and-pound agreement (1 inch = 25.4 mm exactly), so cross-system results are exact to within the rounding of the displayed decimals.

Real-world reference: typical sizes of rooms, lots, fields and countries

A standard hotel room is about 25 m² (270 ft²). A typical US suburban house lot is 0.2 acres (≈ 800 m²). A FIFA football pitch is about 7,000 m² (0.7 ha, 1.7 acres). Central Park in New York covers 341 hectares (843 acres, 3.41 km², 1.32 mi²). The city of Paris is 105 km² (40 mi²); Tokyo metropolitan area is 2,194 km² (847 mi²); the state of Texas is 695,662 km² (268,597 mi²). Useful when reading a real-estate listing in one unit system and trying to picture the size in your familiar one.

Glossary

Square millimeter (mm²)

A square millimeter is the area of a square one millimeter on each side, equal to one millionth of a square meter (1 mm² = 10⁻⁶ m²). Used for cross-section areas of wires, fine engineering tolerances, microelectronics and printed circuit board pad sizes. 100 mm² fit into 1 cm², not 10 — area scales as the square of length.

Square centimeter (cm²)

A square centimeter equals 100 mm² or 10⁻⁴ m². Used for cross-section areas in physics and chemistry, small object surfaces and packaging. Note that 1 m² = 10,000 cm² (not 100), because area scales as the square of the linear dimension. A standard credit card has an area of about 46 cm².

Square meter (m²)

The square meter is the SI derived unit of area, equal to the area of a square one meter on each side. It is the standard unit for room sizes, real-estate floor area in metric countries, fabric and material widths × heights, and most engineering surface areas. 1 m² = 10,000 cm² = 10.7639 ft².

Hectare (ha)

A hectare is exactly 10,000 m² or one square hectometer (100 m × 100 m). Used worldwide for agricultural land, forestry, urban planning and large parcels. 1 hectare equals 0.01 km² and approximately 2.471 acres. A standard FIFA football pitch is roughly 0.7 hectares; a typical farm in Europe averages 5–50 hectares.

Square kilometer (km²)

A square kilometer equals 1,000,000 m² or 100 hectares. It is the standard unit for city, region and country areas on metric maps. 1 km² ≈ 0.3861 mi² ≈ 247.1 acres. Note: 1 km² = 1,000,000 m² (not 1,000), because area scales as the square of length. The city of Paris covers about 105 km².

Square inch (in²)

A square inch is the area of a square one inch on each side, equal to exactly 0.00064516 m² (since 1 inch = 25.4 mm exactly). It is used in US engineering for cross-sections, packaging and small-component surface areas. 144 in² make one square foot; a standard US envelope flap is about 35 in².

Square foot (ft²)

A square foot equals exactly 0.09290304 m². It is the dominant unit for floor area, real-estate listings and construction in the United States and a few other countries. A typical US apartment ranges 600–1,200 ft²; a standard parking space is about 200 ft². 1 m² ≈ 10.764 ft².

Square yard (yd²)

A square yard equals 9 ft² or about 0.836 m². Used in US/UK fabric and carpet retail, landscape mulch coverage, and some construction estimates where the yard-based grid is more convenient than feet. A standard parking space is about 22 yd²; a queen-size bedsheet covers roughly 5 yd².

Acre

An acre is exactly 43,560 ft² or about 4,046.86 m² (≈ 0.4047 hectares). The unit dates from medieval England, originally defined as the land a yoke of oxen could plow in a day. Standard for US farmland, real-estate lots and conservation land. 640 acres make one square mile; a typical American suburban house lot is 0.2–0.5 acres.

Square mile (mi²)

A square mile equals 640 acres or about 2.59 km² (since 1 mi = 1.609 km, 1 mi² = 1.609² km² = 2.59 km²). Used for US/UK city and county areas. The city of Chicago covers about 234 mi²; the state of Texas is about 268,597 mi². 1 km² ≈ 0.3861 mi².

Related tools

Square Meters to Square Feet
Convert m² to ft² — 1 m² ≈ 10.764 ft²
Square Feet to Square Meters
Convert ft² to m² — exact factor 1 ft² = 0.0929 m²
Hectares to Acres
Convert hectares to acres — 1 ha ≈ 2.471 acres
Acres to Hectares
Convert acres to hectares — 1 acre ≈ 0.4047 ha
Square Kilometers to Square Miles
Convert km² to mi² — 1 km² ≈ 0.3861 mi²
Square Centimeters to Square Inches
Convert cm² to in² — 1 cm² ≈ 0.155 in²
Length Converter
Convert length units between metric and imperial — mm, cm, m, km, inches, feet, yards, miles