How many square metre are in 1 katha?

It depends on the state, because the katha is not a fixed size. In Bihar, 1 katha = 126.4643 square metre. Across the states listed, the answer ranges from 33.44509 to 267.5608 square metre — choose your state in the converter above for an accurate result.

Why does the katha vary by state?

The katha is a traditional unit recorded differently in each state's revenue system, and many states use a larger "pucca" and a smaller "kachha" version. There is no single national value, so the only correct conversion is the one for your specific state or district.

How do I convert katha to square metre?

Pick your state above so the tool uses that state's katha value, then type the amount. For example, in Bihar, multiply katha by 126.4643 to get square metre.

Which states is the katha used in?

This converter covers: Bihar; West Bengal (rural); West Bengal (Kolkata); Assam (1 bigha = 5 katha); Jharkhand (Ranchi); Madhya Pradesh. For legal or property transactions, always confirm the local value against your revenue records (patwari / tehsil).

Convert Katha to Square Metre

The katha is not a fixed size — it varies by state. Across the states below, 1 katha = 33.44509–267.5608 square metre. Pick your state for an accurate result; it runs entirely in your browser.

1 Katha = 126.4643 Square Metre (Bihar)

Katha value — choose your state / region

Katha (katha)

Square Metre (m²)

⇅ Reverse (Square Metre → Katha)

Katha to Square Metre by state

Because the katha differs from state to state, the table below gives the value in each state we cover. The square-foot column is the standard defining value; the metre and conversion columns are computed from it.

State / region	1 Katha (sq ft)	1 Katha (m²)	1 Katha → Square Metre	1 Square Metre → Katha
Bihar	1,361.25	126.4643	126.4643 m²	0.007907372 katha
West Bengal (rural)	720	66.89019	66.89019 m²	0.01494988 katha
West Bengal (Kolkata)	360	33.44509	33.44509 m²	0.02989975 katha
Assam (1 bigha = 5 katha)	2,880	267.5608	267.5608 m²	0.003737469 katha
Jharkhand (Ranchi)	720	66.89019	66.89019 m²	0.01494988 katha
Madhya Pradesh	600	55.74182	55.74182 m²	0.01793985 katha

Indian land units vary by state and even by district, and local custom can differ from the standard value. For any legal, property or financial purpose, confirm the value against your local revenue records (patwari / tehsil) before relying on it.

About katha and square metre

Katha: A katha (also spelt kattha) is the common land unit across eastern India. In most states 1 bigha = 20 katha, but in Assam 1 bigha = 5 katha, so the katha’s size varies widely by state.

Square Metre: The square metre is the SI unit of area — a 1 m × 1 m square.

Frequently asked questions

How many square metre are in 1 katha?: It depends on the state, because the katha is not a fixed size. In Bihar, 1 katha = 126.4643 square metre. Across the states listed, the answer ranges from 33.44509 to 267.5608 square metre — choose your state in the converter above for an accurate result.
Why does the katha vary by state?: The katha is a traditional unit recorded differently in each state's revenue system, and many states use a larger "pucca" and a smaller "kachha" version. There is no single national value, so the only correct conversion is the one for your specific state or district.
How do I convert katha to square metre?: Pick your state above so the tool uses that state's katha value, then type the amount. For example, in Bihar, multiply katha by 126.4643 to get square metre.
Which states is the katha used in?: This converter covers: Bihar; West Bengal (rural); West Bengal (Kolkata); Assam (1 bigha = 5 katha); Jharkhand (Ranchi); Madhya Pradesh. For legal or property transactions, always confirm the local value against your revenue records (patwari / tehsil).

Related area conversions

See all area unit conversions →

Full state-by-state size reference (bigha, biswa, katha, dhur) →

Sources

Per-state values are cross-checked against multiple references, including Wikipedia: Bigha, Wikipedia: Katha, Wikipedia: Measurement of land in Punjab and state land-record references. Where sources genuinely disagree we show the documented variants rather than a single figure.