Mixed units: bigha + katha + chhatak
How to convert bigha to katha
In West Bengal the formula is one line: Katha = Bigha × 20.
Enter the area
Type your land area, for example 2.5.
Pick the units
Choose Bigha in From and Katha in To.
Read the answer
2.5 bigha × 20 = 50 katha, shown instantly.
Bigha to katha conversion table (West Bengal)
All values use 1 bigha = 20 katha = 14,400 sq ft and 1 decimal = 435.6 sq ft.
| Bigha | Katha | Chhatak | Decimal | Sq ft |
|---|---|---|---|---|
| 0.25 bigha | 5 | 80 | 8.26 | 3,600 |
| 0.5 bigha | 10 | 160 | 16.53 | 7,200 |
| 1 bigha | 20 | 320 | 33.06 | 14,400 |
| 2 bigha | 40 | 640 | 66.12 | 28,800 |
| 3 bigha | 60 | 960 | 99.17 | 43,200 |
| 4 bigha | 80 | 1,280 | 132.23 | 57,600 |
| 5 bigha | 100 | 1,600 | 165.29 | 72,000 |
| 6 bigha | 120 | 1,920 | 198.35 | 86,400 |
| 7 bigha | 140 | 2,240 | 231.40 | 100,800 |
| 8 bigha | 160 | 2,560 | 264.46 | 115,200 |
| 9 bigha | 180 | 2,880 | 297.52 | 129,600 |
| 10 bigha | 200 | 3,200 | 330.58 | 144,000 |
| 15 bigha | 300 | 4,800 | 495.87 | 216,000 |
| 20 bigha | 400 | 6,400 | 661.16 | 288,000 |
| 25 bigha | 500 | 8,000 | 826.45 | 360,000 |
| 50 bigha | 1,000 | 16,000 | 1,652.89 | 720,000 |
| 100 bigha | 2,000 | 32,000 | 3,305.79 | 1,440,000 |
Katha to bigha, sq ft and decimal
| Katha | Bigha | Sq ft | Decimal |
|---|---|---|---|
| 1 katha | 0.050 | 720 | 1.65 |
| 2 katha | 0.100 | 1,440 | 3.31 |
| 3 katha | 0.150 | 2,160 | 4.96 |
| 4 katha | 0.200 | 2,880 | 6.61 |
| 5 katha | 0.250 | 3,600 | 8.26 |
| 10 katha | 0.500 | 7,200 | 16.53 |
| 15 katha | 0.750 | 10,800 | 24.79 |
| 20 katha | 1.000 | 14,400 | 33.06 |
| 40 katha | 2.000 | 28,800 | 66.12 |
| 50 katha | 2.500 | 36,000 | 82.64 |
| 100 katha | 5.000 | 72,000 | 165.29 |
West Bengal land units at a glance
| Unit | Katha | Bigha | Decimal | Sq ft |
|---|---|---|---|---|
| 1 chhatak | 0.06 | 0.003 | 0.10 | 45 |
| 1 katha | 1.00 | 0.050 | 1.65 | 720 |
| 1 bigha | 20.00 | 1.000 | 33.06 | 14,400 |
| 1 decimal (shatak) | 0.60 | 0.030 | 1.00 | 436 |
| 1 acre | 60.50 | 3.025 | 100.00 | 43,560 |
| 1 hectare | 149.50 | 7.475 | 247.11 | 107,639 |
Worked example: 3 bigha 10 katha
Total sq ft = (3 × 14,400) + (10 × 720) = 50,400 sq ft. That is 70 katha, or about 115.70 decimal, or 1.157 acre.
Is bigha the same in every state?
No. Always check which bigha a seller means before you agree on a price.
| Region | 1 bigha (approx.) | Katha per bigha |
|---|---|---|
| West Bengal | 14,400 sq ft | 20 katha (1 katha = 720 sq ft) |
| Assam | 14,400 sq ft | 5 katha (1 katha = 2,880 sq ft) |
| Bangladesh | 14,400 sq ft (33 decimal) | 20 katha |
| Uttar Pradesh / Rajasthan | About 27,000 sq ft or more | Varies by district |
The same word katha means very different areas in Assam and Bihar, which is why a state-specific calculator matters. This page is built for West Bengal.
Checking your land on Banglar Bhumi
West Bengal's Banglar Bhumi portal lets you view record of rights (khatian), plot (dag) details and mutation status. Area there is normally shown in acre and decimal. Convert it to bigha and katha here to match how plots are quoted in local sales.
Tips before you buy or sell land
- Write the area in decimal or sq ft in the deed, not only in bigha-katha, to avoid disputes.
- Match the khatian area with the deed and the physical plot.
- Hire a licensed surveyor (amin) to measure on the ground.
- Confirm mutation after purchase so the record is in your name.
Related tools
Frequently asked questions
How many katha are in 1 bigha in West Bengal?
In West Bengal, 1 bigha = 20 katha. One katha is 720 sq ft and one bigha is 14,400 sq ft, so 14,400 ÷ 720 = 20.
How many square feet are in 1 bigha in West Bengal?
1 bigha = 14,400 square feet (about 1,338 square metres).
How many decimal (shatak) are in 1 bigha?
1 bigha ≈ 33.06 decimal, because 1 decimal = 435.6 sq ft. Land records usually round this to 33 decimal.
How many katha are in 1 acre?
1 acre = 43,560 sq ft = 60.5 katha ≈ 3.025 bigha (3 bigha 10 katha 2 chhatak approx.).
How many chhatak are in 1 katha?
1 katha = 16 chhatak, and 1 chhatak = 45 sq ft. So 1 bigha = 20 × 16 = 320 chhatak.
How do I convert bigha to katha?
Multiply the bigha value by 20. Example: 3.5 bigha × 20 = 70 katha. To go back, divide katha by 20.
Is 1 bigha the same everywhere in India?
No. Bigha varies by state: about 14,400 sq ft in West Bengal, Assam (where 1 bigha = 5 katha) and Bangladesh, but roughly 27,000 sq ft or more in Uttar Pradesh and Rajasthan. This calculator uses the West Bengal value.
Which unit does Banglar Bhumi use?
Banglar Bhumi land records normally show area in acre and decimal (shatak). Convert it here to bigha and katha, which most local buyers and sellers still use.
Is this calculator accurate for legal documents?
It is exact for the standard West Bengal values above, but local custom can differ slightly by district or deed. For registration, mutation or disputes, always follow the area written in your deed or khatian and confirm with a licensed surveyor.
How do I convert 2 bigha 5 katha into decimal?
Total sq ft = (2 × 14,400) + (5 × 720) = 32,400. Divide by 435.6 to get about 74.38 decimal. Use the Mixed Units box above to do this in one step.