Pro Calculators and Guides
How to Convert Land Units: Katha, Bigha, Decimal, Acre and Square Feet
Convert land area between katha, bigha, decimal, acre, chhatak, square feet, square metres and hectare, with the conversion values used in Bangladesh.
Saizul Amin15 Oct 2026 · Updated 17 Oct 2026 · 1 min read
A land deal in Bangladesh quotes katha, bigha and decimal, while a map or plan may use square feet or square metres. Mixing them up can change a price by lakhs of taka, so a clear conversion table matters.
Quick answer
The tool uses 1 katha = 720 square feet, 1 bigha = 20 katha (14,400 sq ft), 1 decimal = 435.6 sq ft and 1 acre = 100 decimal (43,560 sq ft).
Conversion table
| Unit | Square feet | Square metres |
|---|---|---|
| 1 chhatak | 45 | 4.18 |
| 1 katha | 720 | 66.89 |
| 1 decimal (shatak) | 435.6 | 40.47 |
| 1 bigha | 14,400 | 1,337.8 |
| 1 acre | 43,560 | 4,046.9 |
| 1 hectare | 107,639 | 10,000 |
Examples
- 5 katha = 3,600 sq ft = about 8.26 decimal.
- 33 decimal = 14,375 sq ft = one third of an acre.
Using the tool
- Type the amount.
- Choose its unit.
- Read all other units together.
Important warnings
- Local variation: in some regions a bigha or katha has a different size. In parts of West Bengal and Assam, the bigha differs from 14,400 sq ft.
- Always verify with the land record (khatian, deed) and a surveyor before paying.
- Square feet in a deed are the legal figure; confirm the measurements on site.
Tip
When comparing prices, convert both offers to price per square foot or per decimal.
