Acre to Katha Calculator
Convert acres into katha instantly using the regional standard you need. Because katha values vary by locality, choose the correct region before calculating.
Quick reference
- 1 acre in square feet43,560 sq ft
- 1 acre in square meters4,046.8564224 sq m
- 1 acre in hectares0.40468564224 ha
- Bangladesh katha1 acre = 60 katha
- West Bengal katha1 acre = 32 katha
- Assam katha1 acre = 75 katha
Expert Guide to Using an Acre to Katha Calculator
An acre to katha calculator helps you convert a globally familiar land unit, the acre, into a locally recognized unit, the katha. This is particularly useful in South Asia, where land discussions, property advertisements, inheritance records, and agricultural references often rely on traditional units instead of purely metric measurements. The challenge is that katha is not uniform everywhere. In one place, 1 acre may equal 60 katha, while in another it may equal 32 or 75 katha. That is why a smart calculator should always include a regional option rather than offering a single universal answer.
If you are buying land, checking a deed, preparing a valuation, or comparing a listing with official records, accurate conversion matters. A small misunderstanding in unit standards can create a major pricing error. For example, the same 2 acre parcel converts very differently under different katha conventions. This page is designed to make that process easier by allowing you to enter acres, choose the applicable regional standard, and instantly see the result in katha along with related area units such as square feet, square meters, and hectares.
Before using any land conversion tool for legal or transactional purposes, always verify the local standard with the relevant land office, survey record, registry document, or official map. Traditional units are practical in daily use, but they can vary significantly across jurisdictions and even within nearby districts.
What is an acre?
An acre is a widely used land area unit in countries that follow or historically followed imperial or customary measurement systems. It remains common in real estate, agriculture, and land planning. The standard international acre is defined as 43,560 square feet, which is also equal to 4,046.8564224 square meters or about 0.4047 hectares. Because the acre has a precise modern definition, it is often used as the stable starting point for conversions into local units such as katha, bigha, decimal, or kanal.
In digital calculators, the acre is especially useful because it converts cleanly into square feet, square meters, hectares, and many regional units. If your title document is in acres but local sellers or brokers speak in katha, a conversion calculator acts as the bridge between official measurement and practical market language.
What is katha?
Katha is a traditional land measurement unit used in parts of Bangladesh and India, especially in regions such as West Bengal, Assam, Bihar, and neighboring areas. However, unlike the acre, the size of one katha is not universal. The exact value depends on the regional system in use. That means an acre to katha conversion cannot be correct unless the local standard is known first.
For everyday property communication, people often refer to land in katha because it feels more granular and market friendly than acres. Small residential plots, roadside commercial parcels, and urban fringe holdings are commonly described this way. In practical terms, katha functions as a local trading language for land. In legal terms, however, the underlying measurements should still be checked against survey records and official documents.
How the acre to katha formula works
The formula is simple once the region is selected:
- Take the land area in acres.
- Identify the regional conversion factor for katha.
- Multiply acres by the number of kathas in 1 acre.
So the general formula is:
Katha = Acre × Regional conversion factor
Examples:
- Using the Bangladesh standard: 1.5 acres × 60 = 90 katha
- Using the West Bengal standard: 1.5 acres × 32 = 48 katha
- Using the Assam standard: 1.5 acres × 75 = 112.5 katha
This difference shows why regional selection is essential. The same parcel size in acres can yield very different katha values depending on local usage.
Common acre to katha conversion standards
Below is a practical comparison of common standards used in acre to katha conversions. These values are broadly cited in regional land discussions, but local legal practice should still be checked before any sale, registration, mortgage, inheritance division, or court submission.
| Region or standard | 1 acre equals | Approximate size of 1 katha | Notes |
|---|---|---|---|
| Bangladesh standard | 60 katha | 720 sq ft | Commonly used in many Bangladesh land calculations |
| West Bengal standard | 32 katha | 1,361.25 sq ft | Widely referenced in West Bengal property contexts |
| Assam standard | 75 katha | 580.8 sq ft | Traditional conversion often used in Assam land discussions |
Notice the difference in the approximate size of one katha. In Bangladesh, a katha is commonly treated as 720 square feet. In West Bengal, it is often around 1,361.25 square feet. In Assam, it may be around 580.8 square feet. That means even if two sellers both say a plot is “10 katha,” the actual land size can differ dramatically if they are using different standards.
Fast reference table for popular acre values
The following table gives quick conversions for several common acre inputs across the three regional standards included in this calculator.
| Acres | Bangladesh standard | West Bengal standard | Assam standard |
|---|---|---|---|
| 0.25 | 15 katha | 8 katha | 18.75 katha |
| 0.50 | 30 katha | 16 katha | 37.5 katha |
| 1.00 | 60 katha | 32 katha | 75 katha |
| 2.00 | 120 katha | 64 katha | 150 katha |
| 5.00 | 300 katha | 160 katha | 375 katha |
When an acre to katha calculator is most useful
- Real estate buying and selling: Compare broker quotes stated in katha with deeds or survey records stated in acres.
- Agricultural planning: Translate acreage into the local unit used by workers, contractors, or neighboring farmers.
- Inheritance and family partition: Split land more clearly when family members understand local units better than acres.
- Construction and development: Estimate plot size for roads, setbacks, foundations, and layout planning.
- Record verification: Cross-check old handwritten records, municipal descriptions, and revenue documents against standardized units.
How to use this calculator correctly
- Enter the land area in acres.
- Select the region or standard that matches your deed, survey, or local market practice.
- Choose the decimal precision you want.
- Pick a secondary output unit if you want additional context in square feet, square meters, or hectares.
- Click Calculate to see the converted katha value and the supporting measurements.
This tool also displays a chart so you can visually compare the selected conversion against the other available regional standards. That is useful if you are working on cross-border property research, historical record interpretation, or market comparisons.
Common mistakes people make in land conversion
- Assuming katha is universal: This is the biggest error. Katha varies by locality.
- Ignoring document language: The property paper may use one standard while the market conversation uses another.
- Rounding too early: Large parcels can produce meaningful differences if rounding is done before the final step.
- Using informal broker values without verification: Always confirm with official records if the conversion affects price or legal rights.
- Confusing survey units with marketing units: Advertised sizes are sometimes rounded for convenience.
Acre, square feet, and metric equivalents
Even when your final answer is in katha, it helps to understand the acre in universal terms. Because 1 acre always equals 43,560 square feet, you can use square feet as a neutral benchmark when comparing regional katha definitions. Likewise, 1 acre equals 4,046.8564224 square meters and about 0.404685642 hectares, which makes metric conversion straightforward for engineering, planning, or academic work.
If a seller tells you a plot is 20 katha, you can reverse engineer the likely square footage if you know the regional standard. This is valuable when comparing land advertisements from different cities or districts. In situations involving loans, legal drafting, and survey-based planning, square feet or square meters often provide the clearest common language.
Why local verification is essential
Traditional land units developed through regional practice, and in many places they still coexist with official metric and survey systems. That means the same unit name may not carry the same exact area value everywhere. A reliable workflow is to use the calculator for estimation and comparison, then confirm the specific local standard through land records, revenue offices, cadastral maps, or registry documents before making any final financial or legal decision.
For more reliable background on land measurement standards and area conversions, consult authoritative sources such as the National Institute of Standards and Technology, the U.S. Geological Survey, and land records or revenue references published by regional governments such as the Government of West Bengal land records portal. These sources can help anchor your understanding of standard area units and official land administration practice.
Practical examples
Example 1: A buyer sees a listing for 0.75 acre and wants the figure in Bangladesh katha. Multiply 0.75 by 60. The result is 45 katha.
Example 2: A family deed mentions 2.25 acres, but local relatives use West Bengal katha. Multiply 2.25 by 32. The result is 72 katha.
Example 3: A farming parcel in Assam measures 3.4 acres. Multiply 3.4 by 75. The result is 255 katha.
These examples show how the same basic formula can be adapted once the regional factor is known. The calculator on this page automates the process and also returns supportive unit equivalents so you can compare the result across multiple systems.
Final takeaway
An acre to katha calculator is simple in concept but only accurate when it respects regional variation. The acre itself is standardized, but katha is not. If you choose the correct local conversion factor, the calculation becomes fast, clear, and highly practical for property transactions, land analysis, and record interpretation. Use this tool for quick conversion, but for anything involving money, title, tax, or legal effect, verify the standard with official documentation.
Important note: Regional usage of katha may vary by district, historical record set, or local administrative practice. This calculator provides practical reference conversions and should not replace certified survey data or legal advice.