SurveyMetric PRECISION ENGINE

Area & Land Calculator — Cadastral • Engineering • Architecture • Geometry

Active Profile: Land Surveyor / Cadastral CADASTRAL

Precision cadastral geometry.

Visual Geometry Board

Polygon
Select a shape and enter dimensions. Vector Geometry Engine
Calculation Status Ready
CALCULATED AREA
0.000
Square Feet

⚠ Marla and Bigha have multiple regional standards and vary by province, city and housing society. These values are clearly labeled estimates — always confirm the exact standard used for your property with your local revenue/land record office before relying on this for legal or financial decisions.

Multi-Unit Conversion

Sq ft 0
Sq m 0
Marla 272.25 0
Marla 225 0
Marla 250 0
Kanal 0
Acre 0

Price Estimator / Currency Converter

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ESTIMATED VALUE
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Formula / Concept / Calculation

Select a shape and calculate to see the exact formula and solved steps.

Understanding Area & Land Measurement Units

How is 1 Marla calculated?

Marla does not have one universal size. Punjab revenue records (Patwari/Fard, Jamabandi) and LDA use 1 Marla = 272.25 sq ft. DHA (all cities), Bahria Town, CDA Islamabad and most private housing societies use 1 Marla = 225 sq ft. Some KP satellite towns use 1 Marla = 250 sq ft. Always check your property documents to confirm which standard applies before making a financial decision.

1 Kanal = how many sq ft?

1 Kanal always equals 20 Marla, but its size in square feet depends on the Marla standard used: 5,445 sq ft at the 272.25 standard, 5,000 sq ft at the 250 standard, and 4,500 sq ft at the 225 standard used by DHA and Bahria Town. Use the Output Unit selector above to convert your calculated area into Kanal instantly.

How is an irregular land plot's area calculated?

Real plots are rarely perfect rectangles. The reliable method is diagonal triangulation: measure all four sides plus one diagonal, which splits the plot into two triangles. Each triangle's area is exact once solved with Heron's formula, A = √(s(s−a)(s−b)(s−c)), where s is the semi-perimeter. Adding the two triangle areas gives the exact plot area — side lengths alone are not enough, because the same four sides can enclose different areas depending on the corner angles.

Is Bigha a fixed unit?

No — Bigha varies by region, from roughly 1,500 to 27,000 sq ft depending on the state or district. The Bigha conversion in this calculator is a single labeled reference value for estimation only. Confirm the exact local Bigha standard with your local revenue office before relying on it for legal or financial purposes.

Frequently Asked Questions

Is this area calculator free to use?

Yes. SurveyMetric is completely free, requires no signup, and every calculation runs locally in your browser — nothing is uploaded.

Can I trust this for a legal survey or property registration?

This tool computes geometry precisely from the measurements you provide, but it does not replace a certified cadastral survey. For registry, inheritance, or legal boundary disputes, verify with a licensed surveyor and your local revenue office.

What is the difference between the Preset, Precision Draw, Freehand and Composite modes?

Preset Shapes uses standard formulas for named shapes. Precision Draw lets you click out a polygon and enter exact side/diagonal measurements for mathematically exact results. Freehand lets you sketch a shape roughly to estimate its area. Composite lets you add and subtract simple regions to build up a complex floor plan or plot.