How this instrument works
Gaj, sometimes spelled gaz, began life centuries ago as a unit of length rather than area, used across Persian- and Mughal-influenced parts of South Asia with a size that varied by region and era — the Mughal Empire's own Ilahi gaz measured close to 0.8 metres, distinct from the English yard entirely. British colonial land survey in North India gradually folded the local gaj into its own measurement framework, and by the time formal cadastral records were standardised, one gaj had been fixed as equal in length to the English yard, exactly 3 feet, or 0.9144 metres.
Modern real estate almost never uses gaj as a length any more; it uses square gaj, shortened in everyday speech to simply 'gaj,' as a unit of area — and because the underlying length unit already matched the yard exactly, one square gaj works out to precisely one square yard, 0.83612736 square metres. That identity is why converting between the two involves no factor at all beyond multiplying by exactly 1.0.
The unit remains in heavy everyday use across Delhi, Haryana, Punjab, Uttar Pradesh and Rajasthan, where plot sizes in property listings, government housing schemes and colloquial conversation are almost always quoted in gaj rather than square metres or square feet. A '100 gaj plot' is one of the most common phrases in North Indian real estate advertising, and it describes exactly the area an American or British buyer would call a 100-square-yard lot.
- Enter the plot size into Gaj (gaj); the field opens at 100, a very common North Indian plot size.
- Read the equivalent area from Square yards (yd2) beneath it — the figure matches exactly, with no rounding.
- Working from a listing already in square yards? No conversion is needed; the two figures are identical.
- Need square metres instead? Multiply the gaj figure by 0.83612736 to convert directly.
Worked example — a 100 gaj plot in Delhi
A property listing in Delhi advertises a residential plot as '100 gaj,' a phrase that appears constantly in North Indian real estate but means little to a buyer used to square yards or square metres. Enter 100 into Gaj (gaj) and Square yards (yd2) reads 100.0 exactly — the same plot, described in a unit an American or British buyer already understands, with not a single digit changed by the conversion.
Converting further into square metres for a metric building plan is equally clean: 100 gaj comes to exactly 83.612736 square metres, or about 900 square feet, since 1 square yard equals precisely 9 square feet by definition. A smaller 50 gaj plot, common for row housing, works out to exactly 50 square yards and 41.806368 square metres, with every figure exact rather than approximate.
Questions
Is one gaj really exactly one square yard?
Yes, exactly, because the length unit gaj was standardised under British colonial land survey to match the English yard precisely — 3 feet, or 0.9144 metres. Since a square gaj is simply a gaj of length squared, and a square yard is simply a yard of length squared, and the two underlying lengths are identical, the resulting areas are identical too. No approximation or rounding enters the relationship at any point.
Where is gaj used as a land measurement today?
Overwhelmingly across North India — Delhi, Haryana, Punjab, Uttar Pradesh and Rajasthan in particular — where residential plot sizes in property listings, government housing allotments and everyday conversation about land are almost always quoted in gaj rather than square metres or square feet. It is comparable in cultural ubiquity to how the cent functions in Kerala real estate, though the two units describe very different sizes.
Was gaj always a unit of area, or did it start as something else?
It started as a unit of length, used across Persian- and Mughal-influenced regions of South Asia with sizes that varied historically — the Mughal Ilahi gaz, for instance, measured close to 0.8 metres, noticeably shorter than the English yard it was later matched to. Only after British land survey folded local length units into its own framework did 'gaj' settle at exactly one yard, and only in modern real estate usage did the term shift to mean the area unit, square gaj, that this page converts.
How many square feet are in a gaj?
Exactly 9, the same as any square yard, since one yard equals 3 feet and 3 squared is 9. Indian construction trade often quotes material and labour rates per square foot even when the underlying plot size is described in gaj, so knowing that a 100 gaj plot equals 900 square feet is a common everyday conversion for anyone pricing out a build.
Is gaj the same size in every Indian state?
In modern formal usage, yes — wherever gaj appears in official land records or standardised real estate listings today, it means the English yard-based square gaj this page converts. Historically, regional variants with different lengths did exist before British-era standardisation, and some older deeds or rural conventions in certain areas may still reference older, non-standard gaj sizes, so a very old document is worth double-checking rather than assumed.
How do I convert a gaj plot size into square metres directly?
Multiply the gaj figure by 0.83612736, the exact area of one square yard in square metres, which follows from the yard's internationally fixed length of 0.9144 metres. A 200 gaj plot, for example, comes to exactly 167.225472 square metres — useful when a gaj-denominated Indian property needs to be compared against a metric building plan or an international buyer's more familiar square-metre figures.