Buying, selling or inheriting land in Nepal often requires dealing with traditional units of measurement that differ significantly from the metric system. The hilly regions use the Ropani system, while the Terai plains use the Bigha system. Each system has smaller subdivisions that can be confusing if you’re unfamiliar with them. This article demystifies these traditional units, provides conversion formulas and examples, and helps you understand how to accurately measure land whether you’re dealing with a hillside farm or a flat Terai plot.

The Ropani System (Hilly Regions)

In the hilly districts, land area is often measured in Ropani, Aana, Paisa and Daam. One Ropani equals 16 Aana, 64 Paisa or 256 Daam and covers an area of about 508.72 square metres (approximately 5,476 square feet)【897413210384820†L135-L151】. One Aana equals 4 Paisa or 16 Daam and covers about 31.80 m² (342.25 ft²)【897413210384820†L135-L151】. A Paisa measures 7.95 m² (85.56 ft²) and a Daam about 1.99 m² (21.39 ft²)【897413210384820†L135-L151】. Knowing these base conversions allows you to calculate land area precisely. For example, if you own 2 Ropani 3 Aana 2 Paisa, convert each unit to square metres and sum them: (2 × 508.72) + (3 × 31.80) + (2 × 7.95) ≈ 1,171.64 m².

The Bigha System (Terai Regions)

The Terai plains use a different system comprised of Bigha, Kattha and Dhur. One Bigha equals 20 Kattha or 400 Dhur and covers approximately 6,772.63 m² (72,900 ft²)【897413210384820†L135-L151】. One Kattha equals 20 Dhur and measures about 338.63 m² (3,645 ft²), while a Dhur is roughly 16.93 m² (182.25 ft²)【897413210384820†L135-L151】. Because the Bigha system represents much larger tracts, conversions to metric units are important for registration and taxation. To convert Bigha to Ropani, note that 1 Ropani is approximately 0.0752 Bigha, and conversely 1 Bigha is about 13.31 Ropani【897413210384820†L153-L158】.

Conversion Table

Here’s a quick reference table for converting between traditional units and metric measures:

Unit	Equivalent	Area (m²)	Area (ft²)
1 Ropani	16 Aana / 64 Paisa / 256 Daam	508.72	5,476
1 Aana	4 Paisa / 16 Daam	31.80	342.25
1 Paisa	4 Daam	7.95	85.56
1 Bigha	20 Kattha / 400 Dhur	6,772.63	72,900
1 Kattha	20 Dhur	338.63	3,645
1 Dhur	—	16.93	182.25

Why Conversions Matter

Converting traditional units to square metres or feet is crucial for several reasons. First, land registry and property deeds often require area in metric units for official records. Second, calculating taxes and fees—such as land registration fees or property taxes—depends on accurate area measurements. Third, construction planning relies on exact dimensions to estimate building materials and costs. Misunderstanding units can lead to costly errors or disputes, especially when transacting across regions that use different systems.

Online tools like Mero Tool’s Land Area Converter simplify these conversions. You input your land size in Ropani/Aana/Paisa/Daam or Bigha/Kattha/Dhur, and the tool outputs the equivalent area in metric units and the other traditional system. This feature is especially useful for people buying or selling property across hilly and Terai regions. Knowing that 1 m² equals about 10.7639 ft²【897413210384820†L155-L159】 also helps when working with international builders or architects.

Conclusion

Nepal’s diverse geography and history have produced two distinct land measurement systems. The Ropani system, used in the hills, breaks down into Aana, Paisa and Daam, while the Terai’s Bigha system subdivides into Kattha and Dhur. Understanding these units and their metric equivalents allows for precise transactions, fair taxation and efficient planning. Whether you’re a farmer, homeowner, real-estate agent or developer, a solid grasp of these conversions—and the ability to switch between them—will help you navigate land dealings with confidence and clarity.