Welcome to Land Calculator — a free, fast, accurate tool for converting Bihar land units according to local Laggi-Haath standards.
Our Mission
Land measurement in Bihar varies meaningfully from district to district. A "Kattha" in Patna isn't the same size as a "Kattha" in Gopalganj. We built this calculator to remove the confusion — pick your district, enter your value, and get an exact conversion using the formula your local revenue office actually uses.
What We Cover
- All 12 major Bihar districts with their standard Laggi Haath
- 13 Haath options from 4.0 to 10.0 for custom calculations
- 7 units: Dhur, Kattha, Bigha, Decimal, Acre, Square Feet, Dhurki
- Custom mode — choose any Haath manually
The Formula
The whole system is built on one anchor:
1 Dhur = (Laggi Haath × 1.5 ft)2
From there: 20 Dhur = 1 Kattha, 20 Kattha = 1 Bigha, 20 Dhurki = 1 Dhur. Decimal and Acre are universal — 1 Acre = 43,560 sq ft = 100 Decimal.
Free Forever
This tool is and will always be free. No ads, no signups, no data harvesting. Calculations run entirely in your browser.