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Land unit converter
The supporting tool for everything else on this site: the source tax floor is priced per decimal, deeds speak in decimals and katha, and flats are sold in square feet. Convert once, then calculate.
The measures: 1 decimal = 435.6 sq ft · 1 katha = 720 sq ft = 1.65 decimals · 1 bigha = 20 katha = 14,400 sq ft · 1 sq ft = 0.092903 sq m. So 5 katha = 8.26 decimals, and 1,500 sq ft = 139.35 sq m.
Convert land units
Which unit does each charge use?
The section 125 land tax floor is per decimal. The structure tax (rule 6(2)) and the developer's section 126 tax are per square metre — the calculator converts your square feet at 0.092903 and rounds to 2 decimals before multiplying, the rounding the methodology states. The statutory ceiling in section 125(2) is expressed per katha and per square foot. One converter, three reasons.
Questions
How many decimals are in a katha?
One katha is 720 square feet and one decimal is 435.6 square feet, so one katha is about 1.65 decimals — and 5 katha is 8.26 decimals. That uses the Dhaka katha of 720 sq ft; the katha is a different size in some districts, so confirm the local measure when a deed depends on it.
How do I convert square feet to decimals?
Divide by 435.6. A 1,500 sq ft flat footprint, for example, is 3.44 decimals of floor area — and 139.35 square metres, which is the figure the source tax’s per-square-metre limb uses.
Why do the calculators ask for decimals?
Because the section 125 source tax floor is set per decimal of land. The deed papers state the area in decimals (shotangsho); if yours are in katha or square feet, convert them here first, then use the land or flat calculator.