Katha to Decimal Conversion: Formula and Examples

In summary

To convert Katha to Decimal, multiply the Katha value by the conversion factor applicable to the relevant state or local measurement system.

• 1 Katha can equal different Decimal values depending on the region
• Formula: Decimal = Katha × applicable conversion factor
• Katha is used for land and property measurement in regions where this unit applies
• Decimal is used for land-area measurement in several parts of India
• The conversion expresses the same physical land area in another unit

For property comparisons or formal documents, use the conversion applicable to the property location and compare the result with the area stated in the sale deed, relevant plan, or registered property record.

Last updated: October 2026

Multiply the area in Katha by the conversion factor applicable to the region to convert it into Decimal.

Use this formula: Decimal = Katha × applicable conversion factor

For example, using a conversion of approximately 3.13 Decimal per Katha:

1 Katha × 3.13 = 3.13 Decimal

Therefore: 1 Katha = approximately 3.13 Decimal

The result can differ in another region because the size of 1 Katha is not uniform across India.

To convert Decimal back to Katha, divide the Decimal value by the applicable Katha-to-Decimal conversion factor.

Use this formula: Katha = Decimal ÷ applicable conversion factor

For example, using the Assam conversion of approximately 6.61 Decimal per Katha:

33.05 Decimal ÷ 6.61 = 5 Katha

Therefore: 33.05 Decimal = approximately 5 Katha

The reverse conversion can help when one property document uses Decimal while another property description or local discussion uses Katha.

An area conversion calculator can help you perform the calculation after selecting the relevant location and measurement units.

For example, to convert 5 Katha to Decimal using the Assam conversion:

1. Select the applicable state or regional measurement.
2. Select Katha as the starting unit.
3. Select Decimal as the target unit.
4. Enter 5 as the area.
5. Review the converted value.

Using the applicable conversion: 5 × 6.61 = 33.05 Decimal

Therefore: 5 Katha = approximately 33.05 Decimal

For a formal property transaction, compare the calculated figure with the area stated in the relevant sale deed, plan or registered property document.

Use Katha when the property description, local record or land transaction uses Katha. Use Decimal when the relevant property record, calculation or local land-measurement practice uses Decimal. The important distinction is that Katha does not have one uniform value across India. The property location should therefore be considered before converting the measurement.

For example:

• A property in West Bengal may use 1 Katha ≈ 1.65 Decimal
• A property in Bihar may use 1 Katha ≈ 3.13 Decimal under the applicable reference value
• A property in Jharkhand may use 1 Katha ≈ 4 Decimal
• A property in Assam may use 1 Katha ≈ 6.61 Decimal

For property comparisons, use the conversion applicable to the location and compare it consistently with the area stated in the relevant document.

Katha can also be expressed in other commonly used area units. Since Katha varies by region, the applicable regional convention should be checked before using a conversion.

*These Katha values apply to the stated reference conversion and should not be treated as a universal Katha standard.

Square feet and square metres can help when land area needs to be compared across property documents or measurement systems.

Because Katha has regional variations, check the applicable local conversion before using the measurement for a property transaction or formal comparison.

Land area is one of the factors considered when assessing property value. Suppose a property record states the land area in Katha while another valuation document records it in Decimal. Converting both measurements using the applicable regional factor can help you check whether they describe a consistent land area.

Accurate measurement can support:

• Comparing property areas
• Reviewing plot size
• Understanding valuation reports
• Checking plans or sale deeds
• Comparing property records

Area alone does not determine property value. Location, property type, permitted use, access, development, legal status, condition and market conditions can also influence valuation. If you are considering property-backed borrowing, a mortgage loan involves a separate assessment of the property, its documents and its valuation rather than relying only on a Katha-to-Decimal conversion.

Correct land measurement can support property assessment for a loan against property, particularly when different property documents express the same area using different units. However, Katha-to-Decimal conversion does not determine loan eligibility, the eligible loan amount or approval.

A lender separately assesses factors such as:

• Property area and type
• Property location
• Ownership documents
• Legal and technical aspects
• Property valuation
• Income and repayment capacity

If one document records a property in Katha and another uses Decimal, converting the measurements correctly can help you check whether both records describe the same area before property assessment. You can compare loan against property interest rates when reviewing potential borrowing costs. You can also use a loan against property EMI calculator to estimate repayments based on the loan amount, interest rate and tenure. EMI stands for Equated Monthly Instalment.

Planning to avail of property-backed finance. Check eligibility for a loan against property with Bajaj Finance and find out how much you can borrow.