Convert Between Area Measurement Units Convert between square millimeters, centimeters, meters, kilometers, inches, feet, yards, acres, and hectares.

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Area Converter

Convert between square millimeters, centimeters, meters, kilometers, inches, feet, yards, acres, and hectares.

Enter the area

Type the area value you want to convert.

Pick your units

Select source and target area units from the dropdown menus.

See the conversion

The result appears instantly. Check the reference table for common conversions.

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What Is Area Converter?

An area converter translates measurements of two-dimensional space between metric and imperial units. Area units are derived from length units by squaring them, which means conversion factors are the square of the corresponding length factors. For example, since 1 foot = 0.3048 meters, 1 square foot = 0.3048² = 0.09290304 square meters. This tool supports nine area units spanning from tiny measurements (square millimeters for precision engineering) to large land areas (square kilometers and acres for real estate and agriculture). Acres and hectares are specialized land measurement units: one hectare equals exactly 10,000 square meters, while one acre is 4,046.86 square meters. Understanding area conversions is essential for real estate, land surveying, construction, agriculture, and geography.

Why Use Area Converter?

Covers metric and imperial area units plus acres and hectares.
Real-time conversion with bidirectional input.
Uses mathematically exact conversion factors.
Essential for real estate, construction, and land management.
Reference table for instant lookup of common conversions.
Completely client-side — no data leaves your browser.

Common Use Cases

Real Estate

Convert property sizes between square feet, square meters, and acres.

Agriculture

Translate field sizes between acres and hectares for international farming contexts.

Construction

Switch between metric and imperial area units for floor plans and material requirements.

Geography

Compare country or city sizes across different area measurement systems.

Technical Guide

The square meter (m²) is the SI derived unit of area. Key relationships:
• 1 m² = 10,000 cm² = 1,000,000 mm²
• 1 km² = 1,000,000 m²
• 1 ft² = 0.09290304 m² (exactly)
• 1 acre = 43,560 ft² = 4,046.8564224 m²
• 1 hectare = 10,000 m² = 2.471 acres

Acres and hectares deserve special mention as they are not simple squares of a length unit. The acre originated from the area a yoke of oxen could plow in one day. The hectare (from Greek "hecto" = 100 and "are" = 100 m²) was designed as a practical land measurement unit in the metric system.

The converter normalizes all inputs to square meters (the base unit) before converting to the target unit. This ensures mathematical consistency across all unit pairs.

Tips & Best Practices

1
To convert area units, square the length conversion factor. Example: 1 ft = 0.3048 m, so 1 ft² = 0.3048² ≈ 0.0929 m².
2
Quick estimate: 1 acre ≈ 0.4 hectares. More precisely, 1 acre = 0.404686 hectares.
3
A football field (US) is about 1.32 acres or 0.535 hectares.
4
For room sizes, 1 m² ≈ 10.76 ft². A 10 × 10 ft room is about 9.3 m².

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Frequently Asked Questions

Q How many square feet are in an acre?

One acre contains exactly 43,560 square feet.

Q What is the difference between an acre and a hectare?

A hectare is 10,000 m² (about 2.471 acres). An acre is about 4,047 m². So one hectare is roughly 2.5 times larger than an acre.

Q How do I convert square meters to square feet?

Multiply square meters by 10.7639. For example, 100 m² ≈ 1,076.39 ft².

Q Why can't I just multiply the length conversion factor?

Area is two-dimensional, so you must square the length factor. 1 ft = 0.3048 m, but 1 ft² = 0.3048² = 0.0929 m², not 0.3048 m².

Q How big is one hectare?

One hectare is 10,000 m², which is a square 100 meters on each side, about 2.47 acres, or roughly the size of a soccer field.

About This Tool

Area Converter is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.