Understanding Bigha to Katha Conversion – A Simple Land Measurement Guide

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Understanding Bigha to Katha Conversion – A Simple Land Measurement Guide

3 min 09 Oct 2025
Highlights:
  • What Is a Bigha vs. Katha?
  • Why You Need a Bigha to Katha Conversion?
  • How to Convert Bigha to Katha – The Basics
  • Why Conversions Differ Across Regions?
  • Why Understanding Conversion Helps Property Buyers?

Land measurement in India varies based on state, with each state (and sometimes even districts) using its own traditional units. Let's say you are dealing with a land transaction in which the property area is listed as "60 kathas" in one place and "3 bighas" in another. This kind of variation can easily cause confusion. Accuracy in comparing, valuing, or documenting property across states is ensured by having a thorough understanding of the bigha to katha conversion. 

What Is a Bigha vs. Katha?

In simpler terms, bigha and katha are traditional land units used widely in northern and eastern parts of India, including states like Bihar, Assam, West Bengal, and Uttar Pradesh. 

The size of a katha (and consequently, a bigha) differs based on regional standards. For instance, in Bihar, one bigha equals 20 kathas. But in Assam, it can be 5 kathas per bigha.  

Why You Need a Bigha to Katha Conversion?

If you’re dealing with land transactions—buying a home plot, checking property documents, or comparing prices—it’s vital to know how to convert bigha to katha accurately. This is because the difference impacts property valuation and taxation.  

Also Read: Bigha to Acre Conversion 

How to Convert Bigha to Katha – The Basics

Though these figures vary across states, here’s a general snapshot of area unit conversion from bigha to katha:  

  • Assam – 1 Bigha = 5 Kathas 
  • Bihar – 1 Bigha = 20 Kathas 
  • West Bengal – 1 Bigha = 20 Kathas 
  • Tripura – 1 Bigha = 20 Kathas 
  • Uttar Pradesh – 1 Bigha = 20 Kathas 

Why Conversions Differ Across Regions?

It all goes back to history—before India adopted the metric system, every region developed its own land measurement standards. So, while a bigha in Assam might cover around 1,200 square metres, in Bihar it could be nearly 2,500 square metres. And the katha follows suit. 

Think of it this way—just as languages differ across India, so do land units. But while dialects can be charming, unit confusion can lead to costly misunderstandings in property dealings. That’s why using verified bigha to katha conversion methods ensures accuracy. 

Also Read: Bigha in India Conversion 

Why Understanding Conversion Helps Property Buyers? 

Imagine that you intend to purchase a plot of land in West Bengal in order to construct your ideal house. Although your real estate agent refers to land in kathas, the seller states that it is 1.5 bighas. You risk misinterpreting the region (and, thus, the cost) if you don't know how to convert bigha to katha. 

Accurate conversions help you: 

  • Negotiate better – You know the real area being discussed 
  • Evaluate prices correctly – Property prices per katha can be compared easily 
  • Simplify documentation – Land records, tax slips, and sale deeds often use different units 

Land measurement might sound technical, but once you understand what a katha vs. a bigha is and how to use a bigha to katha conversion tool, everything becomes simpler. Whether you’re planning to buy land, verify a sale deed, or apply for a Loan Against Property, knowing how to measure accurately offers clarity. 

FAQs

FAQs

Bigha and katha are traditional land measurement units used mainly in northern and eastern India. The exact size of a bigha or katha varies by state—for instance, in Bihar, one bigha equals 20 kathas, while in Assam, one bigha equals 5 kathas.

These units are commonly used in Bihar, Assam, West Bengal, Tripura, and Uttar Pradesh. Each of these states has its own conversion standard, so checking region-specific values is important before finalising any land transaction.

Knowing how to convert bigha to katha ensures accuracy when buying or evaluating land. It helps in comparing property prices, negotiating effectively, and verifying land documents—especially when different units are used by sellers.

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