Sobha OneWorld‘s official page gives its land area as “48 acres and 15.32 guntas”. That is not a typo or an affectation — it is how Karnataka land records actually work. If you are buying property in this state, guntas will appear in your documents, and knowing the arithmetic protects you.

The arithmetic, once and clearly

A gunta is one fortieth of an acre. That is the whole definition and everything else follows.

So “48 acres and 15.32 guntas” is 48 plus 15.32 divided by 40, which is 48.383 acres. In square feet that is roughly 2,108,000.

The decimal in 15.32 guntas is unusual but perfectly ordinary in records — land parcels do not come in whole fractions, and the survey measurement is what it is.

You will also meet the anna and the cent in older or neighbouring-state documents. A cent is 1/100th of an acre and is commoner in Tamil Nadu and Kerala.

Why Karnataka documents use guntas at all

Because the revenue system predates the metric system and predates square feet as a working unit for land.

Karnataka’s land records descend from survey settlements that measured agricultural holdings, where an acre and its fortieths were the practical units. Those records were never rewritten in square feet.

So a survey number, its extent, and any subdivision of it are all recorded in acres and guntas. When agricultural land is converted for residential use, the extent carries across in the same units.

This is why a large project on formerly agricultural land — which describes most township land in Bengaluru’s outskirts — ends up with an acres-and-guntas figure on its brochure.

A developer quoting acres and guntas is usually quoting straight from the records, which is a mild positive signal about where the number came from.

Where guntas will show up in your own paperwork

Even buying an apartment, where you are not buying land directly, guntas appear in documents you should read.

The mother deed and title chain describe the land the project sits on, in acres and guntas, by survey number. Any discrepancy between the extent in the deeds and the extent in the sanctioned plan is worth asking about.

The RERA filing states the project land extent, and for land originating as agricultural it is commonly in these units.

Khata and revenue records for the parcel use them throughout, as do conversion orders and any subdivision records.

If you are buying a plot or a villa rather than an apartment, the extent in guntas is the thing you are actually purchasing, and the conversion to square feet is the number you will compare on price.

Watch for one wrinkle on plots. Sale deeds sometimes state extent in guntas while the price is quoted per square foot, and the two get reconciled with a conversion nobody shows you. Ask for both figures and check the arithmetic yourself.

It is also worth confirming whether the extent in the deed matches the extent in the approved layout plan. Small differences do occur, and they are far easier to resolve before registration than afterwards.

Our guide to where project figures come from covers which documents carry weight when numbers disagree.

The conversion mistakes that cost money

Three of them, and all are easy to make in a hurry.

Treating a gunta as 1,000 sq ft. It is 1,089. On a 20-gunta plot that error is nearly 1,800 sq ft, which at Bengaluru outskirts rates is a meaningful sum.

Confusing guntas with cents. A cent is 1/100th of an acre, so 435.6 sq ft — less than half a gunta. Mixing them up misstates a plot by well over two times.

Comparing land extent with built-up area. A plot measured in guntas is land. An apartment measured in square feet is built-up or super built-up area. They are not comparable and price per square foot means something different in each case.

The habit that avoids all three: convert everything to square feet as soon as you read it, and write the conversion down next to the original figure.

It takes a few seconds and it means every number in your spreadsheet is in the same unit before you start comparing.

A quick reference you can keep

If you remember one number, remember 1,089. Everything else follows from it and from forty guntas to the acre.

For a project figure like 48 acres and 15.32 guntas, the quick method is to divide the guntas by four and read it as a decimal percentage. 15.32 divided by four is 3.83, so 48.383 acres.

That shortcut works because forty guntas to the acre means each gunta is 2.5% of it, and dividing by four gets you there in your head.

Keep it handy. Land in Karnataka will be quoted to you this way for as long as you are buying here.

A final word on why precision matters even on a large project. Land extent is the denominator in every density calculation you will do, so an error there propagates into homes per acre, open space and floor area ratio all at once.

Getting 48.383 rather than 48 acres changes very little. Reading 15.32 guntas as 15.32 acres would change everything, and it is the kind of slip that happens when someone is copying figures quickly into a comparison sheet.

Conversions here are the standard Karnataka equivalences; always read the extent stated in your own documents rather than working from a general figure. Verify any registration yourself on the Karnataka RERA portal before paying a booking amount.