A decimal unit before decimals were fashionable
The cent takes the standardized acre and cuts it into one hundred equal parts — 435.6 sq ft each. That decimal relationship (the name comes from the Latin centum, hundred) makes it the easiest traditional unit to convert: shift the decimal point and you are done. 25 cents is 0.25 acre; 0.4 acre is 40 cents. Because it inherits its definition from the acre, the cent is the same size everywhere it is used.
The house-plot unit of the south
In Kerala especially, and widely in Tamil Nadu and coastal Karnataka, residential land is priced and registered in cents. Typical urban plots run 3-10 cents (1,300-4,400 sq ft); a 10-cent plot with a house is a classic Kerala family property. Larger agricultural parcels in the same states switch to acres, keeping the arithmetic trivial since the units nest exactly.
The identical area appears in eastern India and Bangladesh as the decimal (also called satak or shotangsho) — also 1/100 acre. Chennai adds its own small-plot unit, the ground (2,400 sq ft ≈ 5.51 cents), which you may still see in older city listings.
Working with cents
Multiply cents by 435.6 for square feet, by 40.4686 for square meters; divide by 100 for acres. Buildable area math is direct: a 5-cent plot is 2,178 sq ft of land, and with a 60% ground coverage rule supports a ~1,300 sq ft footprint. The converter shows cents alongside guntha, gaj, and metric units live — useful when a Kerala buyer and a Bengaluru seller are talking past each other in cents and gunthas. For the exact acre relationship see acre to cent.