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🇧🇩 Bangladesh · Katha · Bigha · Decimal · Global Units
Land Area Converter
Convert between Katha, Bigha, Decimal (Shotok), Square Feet, Acre, Hectare, Square Metre and more. Built for Bangladesh land buyers, sellers, and surveyors.
How to Use
- 1Enter the land area value you want to convert.
- 2Select the unit you are converting from (e.g. Katha).
- 3All other units are calculated and shown instantly.
- 4Use the quick preset buttons for the most common BD units.
Example
Input: 5 Katha
- = 3,600 sqft
- = 334.45 sqm
- = 8.264 Decimal
- = 0.25 Bigha
- = 0.08264 Acre
- = 0.03345 Hectare
Land Area Conversion Formulas
Result = Value × (From unit in sqft) ÷ (To unit in sqft)
Unit base values (in sqft):
1 Katha = 720 sqft · 1 Bigha = 14,400 sqft
1 Decimal = 435.6 sqft · 1 Acre = 43,560 sqft
1 Hectare = 107,639 sqft · 1 sqm = 10.7639 sqft
Katha = 720 sqft per Bangladesh Survey Act and DLRS standard. Decimal = 1/100 Acre by definition. Hectare = 10,000 m² (SI).
References & Data Sources for Land Conversion
- Bangladesh Survey Act (Amendment) — DLRS (Department of Land Records and Surveys): 1 Katha = 720 sqft standard for official urban land records.
- Bangladesh Land Administration Manual — Decimal (Shotok) defined as 1/100 of an Acre = 435.6 sqft for all government khatian records.
- SI International System of Units — 1 Hectare = 10,000 m² = 107,639.1 sqft (exact conversion).
- US Survey — 1 Acre = 43,560 sqft (exact); 1 Acre = 100 Decimal (by DLRS definition).
- AC Land Office, Bangladesh — Mouza map and CS/SA/RS/BRS porcha standards for regional Katha variations.
- Conversion factors last reviewed May 2026. Regional variations in Katha (600–720 sqft) exist in older documents — always verify with source porcha.
Land Conversion Tips for Bangladesh
- 1Always verify with official land documents (porcha/পর্চা) which unit is being used — different surveys may use different standards.
- 2Old deeds may use local sub-units: 'sher' and 'gonda' — 1 Katha = 16 gonda, 1 gonda = 80 squarely. Consult a licensed surveyor for old documents.
- 3For large agricultural land, Bigha and Acre are most commonly quoted — use the Bigha preset button for quick conversions.
- 4Government khatian (খতিয়ান) records use Decimal as the standard — convert to Katha only when communicating with buyers or builders.
- 5Cross-check area measurements: take the sqft figure from this converter and compare it to your architect's or surveyor's CAD drawing.
- 6Always get a fresh mouza map (মৌজা ম্যাপ) from the AC Land office before finalising a purchase — the recorded area may differ from physical boundary measurements.
Frequently Asked Questions
How many Katha in 1 Bigha in Bangladesh?
1 Bigha = 20 Katha in Bangladesh under the standard measurement used in Dhaka and most urban districts. 1 Bigha therefore equals 14,400 square feet (20 × 720 sqft). In some older rural land records, Bigha definitions may vary — always verify with the official mouza map or khatian document.
How many Decimal in 1 Bigha?
1 Bigha = 33 Decimal (approximately) in Bangladesh. More precisely: 1 Bigha = 14,400 sqft ÷ 435.6 sqft/Decimal ≈ 33.06 Decimal. For legal documents, use the exact figure from the official khatian rather than rounding.
What is the difference between Katha and Decimal?
Katha and Decimal (Shotok/শতক) are both common in Bangladesh but have different sizes. 1 Katha = 720 sqft. 1 Decimal = 435.6 sqft = 1/100th of an acre. They are not equal — 1 Katha ≈ 1.65 Decimal. Urban deeds in Dhaka typically use Katha; government khatian records and rural deeds often use Decimal.
How many Decimal in 1 Acre?
1 Acre = 100 Decimal = 43,560 square feet. This relationship is exact by definition — the Decimal (Shotok) was historically defined as 1/100th of an acre, which is why it equals 435.6 sqft (43,560 ÷ 100).
Why does Katha size differ in old land documents?
The standard Katha in Bangladesh is 720 sqft, but pre-partition and colonial-era documents sometimes used different local standards — 600 sqft, 660 sqft, or 720 sqft depending on district. Some areas in Chittagong and Sylhet used different local 'sher' and 'gonda' sub-units. Always read the mouza-specific reference in the official survey document (CS, SA, RS, or BRS porcha) to confirm the exact Katha size used in that record.
Which unit does the Bangladesh government use in official land records?
Bangladesh government land records (khatian/খতিয়ান) primarily use Decimal (Shotok) as the standard unit for recording land area. The Record of Rights (RoR) and Cadastral Survey (CS) records express area in Acres, Decimals, and Katha-based sub-units. Court documents and mutation (namjari) records follow the same system. In practice, buyers and sellers commonly negotiate in Katha in urban areas.