Understanding Land Measurement in Bihar
Land measurement in Bihar combines modern statutory records with deeply rooted traditional measurement systems that date back to historical cadastral surveys and the Bihar Tenancy Act of 1885.
In modern digital land records (Bihar Bhumi Portal / DLRS), official areas are recorded in metric and statutory units: Hectares, Acres, and Decimals (Dismil). However, in local transactions, agricultural leases, and family partitions, traditional units such as Bigha, Katha, and Dhur are predominantly used.
Because the length of the measurement pole (Laggi) varies between regions and districts across Bihar, this calculator provides an explicit operational mode selector so you can calculate land areas based on your exact local benchmark without unverified approximations.
The Laggi (Pole) System & Regional Variations
The foundational unit of traditional land measurement in Bihar is the Dhur. By statutory survey definition, 1 Dhur equals 1 square Laggi (1 Laggi length × 1 Laggi width).
In the standard cadastral revenue benchmark (widely used in settlement surveys):
- Standard Laggi = 5.5 Haath (8.25 feet / 99 inches): 1 Dhur = 68.0625 sq ft, 1 Katha = 1,361.25 sq ft, 1 Bigha = 27,225 sq ft (0.625 Acre).
- Regional Laggi = 6.0 Haath (9.0 feet / 108 inches): 1 Dhur = 81 sq ft, 1 Katha = 1,620 sq ft, 1 Bigha = 32,400 sq ft (0.7438 Acre).
- Regional Laggi = 6.5 Haath (9.75 feet / 117 inches): 1 Dhur = 95.0625 sq ft, 1 Katha = 1,901.25 sq ft, 1 Bigha = 38,025 sq ft (0.8729 Acre).
- Regional Laggi = 4.0 Haath (6.0 feet / 72 inches): 1 Dhur = 36 sq ft, 1 Katha = 720 sq ft, 1 Bigha = 14,400 sq ft (0.3306 Acre).
Important Land Conversion Formulas
These verified formulas govern the mathematical relationships between traditional Bihar land units.
Bigha to Katha
One Bigha contains exactly 20 Katha.
Katha = Bigha × 20
Katha to Dhur
One Katha contains exactly 20 Dhur.
Dhur = Katha × 20
Acre to Dismil (Decimal)
One Acre contains exactly 100 Dismil.
Dismil = Acre × 100
Dhur to Dhurki & Phurki
1 Dhur = 20 Dhurki, and 1 Dhurki = 20 Phurki.
Dhurki = Dhur × 20
Important Verified Standard Values (5.5 Haath Laggi)
- 1 Standard Bigha = 27,225 square feet (3,025 sq yd)
- 1 Standard Katha = 1,361.25 square feet
- 1 Standard Dhur = 68.0625 square feet
- 1 Dismil = 435.6 square feet (40.4686 sq m)
- 1 Acre = 43,560 square feet = 100 Dismil = 1.6 Bigha
- 1 Hectare = 10,000 square metres = 2.471 Acres
How to Use the Bihar Land Calculator
- Select the operational mode (Laggi benchmark): Choose the standard 5.5 Haath mode for official cadastral conversions, or select 6.0, 6.5, or 4.0 Haath if your local district uses that laggi length.
- Enter the area value: Type the numeric quantity you want to convert.
- Select From Unit: Choose the unit of your input value (e.g., Bigha, Katha, Dhur, Dismil, Acre).
- Select To Unit: Choose the target unit in which you want the converted result.
- Read the result: The verified calculation engine instantly displays the exact result along with the single-unit conversion baseline.
Verified Bihar Land Conversion Table (Standard 5.5 Haath)
| Land Unit | Square Feet | Square Metres | Scope |
|---|---|---|---|
| Bigha (Standard) | 27,225 | 2,529.285264 | Standard Cadastral Benchmark (0.625 Acre) |
| Katha (Standard) | 1,361.25 | 126.4642632 | 1/20th Bigha |
| Dhur (Standard) | 68.0625 | 6.32321316 | 1 Square Laggi (5.5 Haath) |
| Dismil (Decimal) | 435.6 | 40.468564224 | Statutory Modern Land Record Unit |
| Acre | 43,560 | 4,046.8564224 | Standard National/Statutory Unit |
| Hectare | 107,639.104 | 10,000 | Statutory SI Metric Unit |
Frequently Asked Questions
बिहार में 1 बीघा में कितना कट्ठा और धुर होता है?
बिहार में 1 बीघा में 20 कट्ठा और 400 धुर (1 कट्ठा = 20 धुर) होते हैं।
बिहार में 1 डिसमिल (Decimal) में कितने वर्ग फीट होते हैं?
बिहार में 1 एकड़ = 100 डिसमिल होता है। अतः 1 डिसमिल = 435.6 वर्ग फीट (40.4686 वर्ग मीटर) होता है।
मानक (5.5 हाथ लग्गी) पर 1 बीघा कितने वर्ग फीट का होता है?
बिहार के मानक कैडस्ट्रल राजस्व रिकॉर्ड (5.5 हाथ लग्गी) के अनुसार 1 बीघा = 27,225 वर्ग फीट (3,025 वर्ग गज या 0.625 एकड़) होता है।
लग्गी (Laggi) बदलने से बीघा और कट्ठा के माप पर क्या असर पड़ता है?
बिहार में 1 धुर = 1 वर्ग लग्गी होता है। 5.5 हाथ लग्गी पर 1 कट्ठा 1,361.25 वर्ग फीट, 6 हाथ लग्गी पर 1,620 वर्ग फीट, और 6.5 हाथ लग्गी पर 1,901.25 वर्ग फीट का होता है।
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