Convert Acres to Guntha, Sq Ft and Cents — Farmland Unit Calculator

Unlike residential apartments which are universally measured in standard Square Feet or Square Meters, agricultural land in India relies heavily on an archaic, hyper-regional system of measurement.

The Push for Standardization

While the central government uses the Hectare (equivalent to 2.47 acres or 10,000 square meters) for all official national agricultural surveys, local revenue departments issue land titles (RTC, Pahani, Patta) using localized units.

When you are buying across state borders—for instance, living in Bangalore (Karnataka) but buying managed farmland in Thalli (Tamil Nadu)—you must immediately translate Karnataka's 'Guntas' into Tamil Nadu's 'Cents'. The same area reads very differently in the two units, so it helps to convert before you compare.

The Acre as the Common Denominator

To compare land across states, most buyers default to the Acre. One standard Acre is universally recognized as exactly 43,560 square feet. By converting all regional units back to the Acre, you can effectively compare a farm plot in Devanahalli against a tea estate in Ooty on the same footing.

If you are reviewing land documents (like an RTC or Pahani) issued by the Karnataka Revenue Department, the dominant unit of measurement beneath an Acre will always be the Gunta.

The Mathematical Baseline

A "Gunta" (sometimes spelled Guntha) is strictly defined in Karnataka as exactly 1,089 square feet.

The math scales perfectly to the Acre: there are exactly 40 Guntas in 1 Acre. Therefore: 40 Guntas × 1,089 sq.ft. = 43,560 sq.ft.

Reading Land Records

In Karnataka government records, land extent is often written in an Acre-Gunta format, separated by a hyphen or slash. For example, if a document lists the area as 2-15 or 2/15, it denotes 2 Acres and 15 Guntas.

To convert this completely to Square Feet:
(2 Acres × 43,560) + (15 Guntas × 1,089) = 87,120 + 16,335 = 103,455 Square Feet.

Many Bangalore buyers look at farmland just across the border in Tamil Nadu (Hosur or Thalli). The moment you cross that border, the Gunta vanishes, replaced by the 'Cent'.

What is a Cent?

A Cent is a fundamental unit of land area used in Tamil Nadu and Kerala. It is defined as exactly 1/100th of an Acre.

Therefore, one Cent equals exactly 435.6 square feet.

Guntas vs Cents

A cent (435.6 sq ft) is much smaller than a gunta (1,089 sq ft), so the same area reads very differently in the two units.

For quick mental arithmetic: 1 Gunta is approximately equal to 2.5 Cents. When The One Acre Farms registers a quarter-acre (10 Guntas) farm plot in Denkanikottai (Tamil Nadu) in your name, the Patta document will officially record the extent as 25 Cents.

Conversions tell you the size on paper. On the ground, the same land is described by survey sketches.

The Field Measurement Book (FMB)

The government maintains a Field Measurement Book (FMB) sketch for every survey number. These sketches denote the precise geometric dimensions of the parcel, usually measured in traditional 'Links' or modern meters.

The 11E Sketch

If you are buying a portion of a larger survey number (for example, a 1-acre plot carved out of a 10-acre block), a physical survey must be conducted by a licensed surveyor to generate an 11E sketch (in Karnataka) or a sub-division Patta mapping (in Tamil Nadu).

How One Acre Farms handles the paperwork

A plot's size on paper is only useful if the paper is right. Before we take on a piece of land, we trace its old records and legal history, back through the families who sold it, and check that the documents are correct. We only work in areas where we have direct connections in the local villages and towns, with people we know personally, so we can cross-check the records against what the people there know. Experienced law firms then carry out the full legal due diligence on the documents.