How this calculation works
Price is an amount of money per area unit. Rescaling the denominator reverses the direction used for a quantity conversion: divide a per-cent price by 435.6 to express it per square foot. Apply that rate to an explicitly measured plot quantity.
Equivalent rate = source rate × target area factor / source area factorA worked example
An entered price of ₹1,00,000 per cent is approximately ₹229.568411 per sq ft. A five-cent plot at that unchanged rate gives a quotation of ₹5,00,000 before any separate charges.
Good to know
Arithmetic using entered measurements and explicit unit definitions. Not a boundary survey, title check, valuation, planning approval or determination of legal shares.
Reference: NIST: exact international-foot and acre factors (opens in a new tab) ↗
Check the land-unit definitions and sources
The standard factors use the international foot and an acre of 43,560 sq ft. Cent means 1/100 acre; gunta means 1/40 acre; the selected Chennai ground means 2,400 sq ft.
The Assam report defines bigha as 14,400 sq ft, katha as 2,880 sq ft and lecha as 144 sq ft. The cited West Bengal court order mentions a 720-sq-ft katha convention. These are explicit presets, not an automatic definition for every record or every place using the same name. Match your record to the stated convention, or use its verified custom factor.
- NIST: exact international-foot and acre factors (opens in a new tab) ↗
- API Setu MDDS: acre/cent and acre/gunta relationships (opens in a new tab) ↗
- Greater Chennai Corporation: one ground is 2,400 sq ft (opens in a new tab) ↗
- Government of Assam AIRBMP framework: section 7.2, page 28 (bigha, katha and lecha) (opens in a new tab) ↗
- Supreme Court order, 7 May 2025: paragraph 2, page 2 (West Bengal katha) (opens in a new tab) ↗
The acre relationships are converted using exact base factors. Rounded or unrelated regional values in a reference table are not substituted for these definitions.
The price denominator matters as much as the price
A quotation of ₹1,00,000 per cent does not become ₹4,35,60,000 per square foot. One cent contains 435.6 square feet, so the per-square-foot price is smaller: approximately ₹229.568411. Multiplying instead of dividing reverses the meaning of the quotation.
A price per acre can be converted to a price per gunta by dividing by forty. A price per square foot can be converted to a price per square yard by multiplying by nine. The tool applies the same area-factor ratio to every supported pair rather than using a separate rounding shortcut for each direction.
When comparing two listings, normalize both to the same unit, then check whether the quoted amounts include the same things. This calculation adds no development charges, brokerage, tax, registration cost or infrastructure contribution. A comparable unit rate does not make unlike terms equivalent.
Use the area that the quotation actually covers
At ₹1,00,000 per cent, five cents give ₹5,00,000. If the measured plot instead has 2,000 sq ft, its area is less than five cents; enter 2,000 with the square-foot area unit and the modeled total changes accordingly. Do not reuse the advertised label after finding a different measured quantity.
Land share area answers another question: it applies already supplied fractions to a parcel. A fraction of the area need not carry the same fraction of sale value when different physical portions have different frontage, access or other characteristics.
The output is an entered-price scenario, not a price discovery service. To compare change over time, CAGR is a separate mathematical summary of two entered values and a period; it does not establish a current market quotation.
A few questions, answered
Are rates fetched for my district?
No. Every price is supplied by you, and the tool performs no market lookup.
Is this a stamp-duty calculator?
No. It converts a price basis and multiplies a quantity; no statutory rate or registration charge is applied.
Why are there decimals in the equivalent price?
A per-cent quotation usually does not divide into a whole-rupee square-foot amount. The calculation retains precision before rounding its display.