Free · Accurate · Instant

Area Calculator

Calculate the area of any common shape, then convert between square feet, square metres, acres, and Indian land units like Bigha, Guntha, and Marla — all in one place.

✓ Free Forever ✓ 7 Shapes Supported ✓ Indian Land Units

Advanced Area Calculator

Please enter valid, positive numbers for all fields.

Bonus Tool

Indian Land Unit Converter

Convert between square feet, square metres, and traditional Indian land units used in real estate across different states.

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Note: Bigha, Guntha and Marla sizes vary by state in India. We use commonly cited standard reference values — always confirm local conversions for legal or transaction purposes.

Reference

Area Formulas by Shape

All the formulas powering the calculator above.

ShapeFormula
RectangleLength × Width
SquareSide × Side
Circleπ × Radius²
Triangle(Base × Height) ÷ 2
Trapezoid((Base A + Base B) ÷ 2) × Height
ParallelogramBase × Height
Ellipseπ × Semi-axis A × Semi-axis B
Worked Example

Step-by-Step Example

A rectangular plot: 40 feet long, 25 feet wide.

1
Apply the formula: Area = Length × Width
2
Calculate: 40 ft × 25 ft = 1,000 sq ft
3
Convert to sq m: 1,000 × 0.0929 = 92.9 sq m
4
Convert to Guntha: 1,000 ÷ 1,089 ≈ 0.92 Guntha
Quick Reference

Common Land Unit Conversions

UnitEquals
1 Acre43,560 sq ft · 4,046.86 sq m
1 Hectare107,639 sq ft · 2.471 acres
1 Square Yard (Gaj)9 sq ft
1 Guntha1,089 sq ft (1/40 acre)
1 Cent435.6 sq ft (1/100 acre)
1 Bigha (UP/Bihar, common ref.)27,225 sq ft varies by state
1 Marla (Punjab/Haryana)272.25 sq ft
1 Kanal5,445 sq ft (20 Marla)
Who Uses This

Common Ways People Use This Calculator

🏠
Real Estate
Compare land listings across units
🏗️
Construction
Estimate flooring, paint, and tiling
🌾
Farming
Measure agricultural fields and plots
🌱
Gardening
Plan lawns, gardens, and landscapes
📋
Students
Solve geometry and area problems
🏢
Architecture
Calculate room and floor areas
🏡
Home Projects
Plan renovations and interiors
📐
Surveying
Measure plots and property boundaries
Get It Right

Tips for Accurate Area Measurement

Measure Twice

Small measurement errors compound quickly when squared — measure each dimension at least twice.

Use Consistent Units

Never mix metres and feet in the same calculation — convert everything to one unit first.

Break Irregular Shapes Down

Split irregular plots into simple shapes, calculate each separately, then add the results.

Confirm Local Land Units

Bigha, Guntha and similar units vary by region — verify local standards before legal transactions.

Round Only at the End

Keep full precision during calculations and round the final result to improve accuracy.

Double-Check Dimensions

Ensure you enter length and width in the correct order and verify decimal points before calculating.

Questions

Frequently Asked Questions

Split the plot into simple shapes (rectangles, triangles), calculate each area separately using our calculator, then add the results together for the total area.
This varies significantly by state — commonly cited references range from about 17,000 to 27,225 sq ft. Our converter uses a commonly cited UP/Bihar reference value; always confirm the local standard for your state.
1 Guntha equals 1,089 sq ft, which is 1/40th of an acre. It's commonly used in Maharashtra and Karnataka.
Area measures the surface enclosed within a shape (in square units), while perimeter measures the total length of its boundary (in linear units). This calculator focuses on area.
Multiply the number of acres by 43,560. Or use the Land Unit Converter above for an instant result, including conversion to Indian units.
No, this tool calculates 2D surface area only. For volume, you'd need a separate calculation involving depth or height as a third dimension.
Traditional land units like Bigha and Marla predate standardised metric measurement and were historically defined locally, so their exact size still differs by region even today.
No. All calculations run in your browser — nothing you enter is sent to or stored on our servers.

Need a Different Measurement?

Explore our full suite of free calculators for area, volume, and everyday conversions.

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