Katha to Decimal or Satak Converter (1 Katha = 1.65 Decimal)

Plots are advertised in katha but recorded in decimal, so this is the conversion every buyer ends up doing. One katha of 720 square feet is 1.6529 decimal of 435.6 square feet. Type the katha below to see the decimal figure, or swap the units to go from a deed's decimal back to katha.

1 katha = 1.6529 decimal (satak) 1 decimal = 0.605 katha. 1 bigha (20 katha) = 33.06 decimal. 1 acre (100 decimal) = 60.5 katha.

How to convert katha to decimal

Both units are defined in square feet, so the factor is 720 ÷ 435.6 = 1.65289.

decimal = katha × 1.65289 katha = decimal × 0.605

Example: a 5 katha plot is 5 × 1.65289 = 8.26 decimal. A deed showing 10 decimal is 10 × 0.605 = 6.05 katha.

Katha to decimal table

Katha	Decimal
1 Katha	1.6529 Decimal
2 Katha	3.3058 Decimal
3 Katha	4.9587 Decimal
4 Katha	6.6116 Decimal
5 Katha	8.2645 Decimal
6 Katha	9.9174 Decimal
7 Katha	11.5702 Decimal
8 Katha	13.2231 Decimal
9 Katha	14.876 Decimal
10 Katha	16.5289 Decimal
15 Katha	24.7934 Decimal
20 Katha	33.0579 Decimal
25 Katha	41.3223 Decimal
30 Katha	49.5868 Decimal
40 Katha	66.1157 Decimal
50 Katha	82.6446 Decimal
75 Katha	123.9669 Decimal
100 Katha	165.2893 Decimal

Decimal to katha table

Decimal	Katha
1 Decimal	0.605 Katha
2 Decimal	1.21 Katha
3 Decimal	1.815 Katha
4 Decimal	2.42 Katha
5 Decimal	3.025 Katha
8 Decimal	4.84 Katha
10 Decimal	6.05 Katha
15 Decimal	9.075 Katha
20 Decimal	12.1 Katha
25 Decimal	15.125 Katha
33 Decimal	19.965 Katha
50 Decimal	30.25 Katha
100 Decimal	60.5 Katha

Katha to satak

Satak, shotok and shotangsho are the Bangla names for decimal, so 1 katha = 1.65 satak and 1 satak = 0.605 katha. 20 katha (one bigha) = 33 satak in a deed, and 60.5 katha = 100 satak = 1 acre.

Katha	Satak	Satak	Katha
1	1.653	1	0.605
2	3.306	2	1.21
3	4.959	5	3.025
5	8.264	10	6.05
10	16.529	20	12.1
20	33.058	33	19.965
60.5	100	100	60.5

Why the two units exist

Decimal comes from the Gunter's chain survey: an acre is 10 square chains and a decimal is a hundredth of it, so every khatian is written in acres and decimal. Katha and bigha are the older units of everyday dealing. A bigha of 33 decimal in a deed is really 33.06 decimal (14,400 sq ft), and the 0.06 decimal difference is about 25 sq ft, well inside normal survey error. For larger areas use the exact factor rather than the rounded 33.