To convert katha to square feet, choose the state, enter the number of katha and click Convert. A katha is 1,361.25 sq ft in Bihar, 720 sq ft in West Bengal and Bangladesh, 2,880 sq ft in Assam, 600 sq ft in Madhya Pradesh and 3,645 sq ft in Nepal. The converter also gives square metres, bigha and acres, works backwards, accepts your own size and runs in your browser.
- Free, no signup
- 6 regions or your own size
- Also gives bigha and acres
- Runs in your browser
Convert many values at once
One number per line. The unit, region and custom size above apply to every line.
How to convert katha to square feet
- Pick the region. A katha is not one size. Choose the state or country, or type the size from your record into Custom size.
- Enter the number of katha. Switch the unit to convert from square feet, acres or another unit instead.
- Click Convert. The result appears in square feet, square yards, square metres, acres, hectares and bigha, each with a copy button.
- Or convert a list. Paste many values, one per line, and download the table as a CSV.
The formula
square feet = katha × (square feet in one katha)
Only the size of one katha changes between places. Results use the exact definitions 1 acre = 43,560 sq ft and 1 sq ft = 0.09290304 m².
Size of a katha by region
| Region | Sq ft | Sq yd | Sq m | Katha per bigha |
|---|---|---|---|---|
| Bihar | 1,361.25 | 151.25 | 126.46 | 20 |
| West Bengal | 720 | 80 | 66.89 | 20 |
| Assam | 2,880 | 320 | 267.56 | 5 |
| Madhya Pradesh | 600 | 66.67 | 55.74 | 20 |
| Bangladesh | 720 | 80 | 66.89 | 20 |
| Nepal | 3,645 | 405 | 338.63 | 20 |
Assam's katha is four times as large as a West Bengal katha, because an Assam bigha has 5 katha and a West Bengal bigha has 20. Bihar's official katha is 1,361.25 sq ft (20 dhur), but some districts use others; published figures include 1,901 sq ft in Muzaffarpur and 3,267 sq ft in West Champaran. Choose Custom for those.
Worked example: 5 katha
Bihar 5 × 1,361.25 = 6,806.25 sq ft (632.32 m², 0.1563 acre) West Bengal 5 × 720 = 3,600 sq ft (334.45 m², 0.0826 acre) Assam 5 × 2,880 = 14,400 sq ft (1,337.80 m², 0.3306 acre, 1 bigha)
Common mistakes
- Using a Bihar katha in West Bengal. The two differ by almost a factor of two (1,361.25 against 720 sq ft).
- Using a West Bengal katha in Assam. An Assam katha is 2,880 sq ft, four times bigger.
- Assuming 20 katha per bigha everywhere. That holds in Bihar, West Bengal, Madhya Pradesh, Bangladesh and Nepal, but an Assam bigha has 5 katha.
- Ignoring district variation. Check the katha defined in your own record.
What this converter does and does not do
- Presets, not law. The sizes are the commonly documented ones. They are not a substitute for the definition in your land record and do not cover every district.
- Exact arithmetic. Given a size, the conversion is exact.
- No legal or valuation advice. Use the area in your registered documents for any transaction.
- Runs in your browser. Nothing is sent to a server.
Related converters
For the larger unit see bigha to acre. For other regional units see guntha to acre and kanal and marla to square feet. The Unit Converter handles other area units, and the guide bigha and katha to acres explains the background.
Frequently asked questions
How do I convert katha to square feet?
Multiply the number of katha by the size of one katha in square feet. In Bihar, 5 katha is 5 × 1,361.25 = 6,806.25 sq ft. Choose your region in the converter or type your own size.
How many square feet is 1 katha?
1,361.25 in Bihar, 720 in West Bengal and Bangladesh, 2,880 in Assam, 600 in Madhya Pradesh and 3,645 in Nepal.
How many katha make a bigha?
20 in Bihar, West Bengal, Madhya Pradesh, Bangladesh and Nepal, and 5 in Assam.
Why is a katha different in each state?
It comes from local land measures. Each place fixed its own katha, so there is no national standard.
How many katha is one acre?
In Bihar, 43,560 / 1,361.25 = 32 katha; in West Bengal, 43,560 / 720 = 60.5 katha; in Assam, 43,560 / 2,880 = 15.125 katha.
How many square metres is a katha?
About 126.46 m² in Bihar, 66.89 m² in West Bengal, 267.56 m² in Assam and 55.74 m² in Madhya Pradesh.
What is a dhur?
In Bihar, a sub-unit of the katha: 20 dhur make a katha, so one dhur is 68.0625 sq ft.
Can I use my own katha size?
Yes. Type the number of square feet in one katha from your record into Custom size. It overrides the region.
Are Bihar katha sizes the same in every district?
No. Published figures show some districts using larger katha, for example 1,901 sq ft in Muzaffarpur and 3,267 sq ft in West Champaran. Use Custom for those.
How accurate is the converter?
The arithmetic is exact. The accuracy of the answer depends on using the right katha size for your land.
Can I use the result for a sale, a loan or a court case?
Treat it as a working figure. Use the area written in your registered deed, jamabandi or khatauni, and ask the revenue office or a licensed surveyor when the exact area matters. This page is not legal or valuation advice.
Can I convert a list of values?
Yes. Paste one number per line, click Convert list, then copy the results or download them as a CSV. The unit, region and custom size you picked apply to every line, and lines that cannot be read are flagged with the reason.
Does it send my values to a server?
No. The conversion runs in your browser, and once the page has loaded it needs no connection.
Related tools and guides
Need survey data cleaned, projected or mapped at scale? Sagarmekhla GIS Consultancy offers GIS and remote sensing services.
Request a consultationLast updated 2026-10-15. Published by Sagarmekhla GIS Consultancy.