Understanding Land Measurement in Nepal: Ropani, Aana, and Bigha Explained

Navigating the Nepal real estate market can feel like learning a new language. While the world uses square meters and acres, Nepal operates on two distinct traditional systems: the Ropani system (Hilly regions/Kathmandu) and the Bigha system (Terai). 

If you are looking at a property listing in Kathmandu or a farm in Chitwan, this guide will help you decode the numbers.

1. The Hilly System: Ropani, Aana, Paisa, Daam

Commonly used in Kathmandu, Pokhara, and the mountain regions, this system is hierarchical. If you see a land size written as 1-2-3-1, it means 1 Ropani, 2 Aana, 3 Paisa, and 1 Daam. 

Unit | Equals | Sq. Feet (Approx.) | Sq. Meters (Approx.)1 Ropani | 16 Aana | 5,476 sq. ft. | 508.72 sq. m.
1 Aana | 4 Paisa | 342.25 sq. ft. | 31.80 sq. m.
1 Paisa | 4 Daam | 85.56 sq. ft. | 7.95 sq. m.
1 Daam | — | 21.39 sq. ft. | 1.99 sq. m.

Practical Context:

• A standard small house in Kathmandu usually sits on 3 to 4 Aana.
• A "generous" bungalow plot is often 8 Aana to 1 Ropani. 
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2. The Terai System: Bigha, Kattha, Dhur

If you are buying land in the flatlands (Terai) like Butwal, Bhairahawa, or Biratnagar, you will use the Bigha system. This system covers much larger areas of land. 

Unit | Equals | Sq. Feet (Approx.) | Sq. Meters (Approx.)1 Bigha | 20 Kattha | 72,900 sq. ft. | 6,772.63 sq. m.
1 Kattha | 20 Dhur | 3,645 sq. ft. | 338.63 sq. m.
1 Dhur | — | 182.25 sq. ft. | 16.93 sq. m.

Did you know? 1 Bigha is roughly equivalent to 13.31 Ropani. 

3. How to Read Your Lalpurja

When you receive your Lalpurja, the area is usually listed in four columns.

• For Kathmandu: [Ropani] - [Aana] - [Paisa] - [Daam] 
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• For Terai: [Bigha] - [Kattha] - [Dhur] - [Kanwa/Paisa] 
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Always double-check the measurement on the ground with a professional surveyor, as physical boundaries (fences/walls) can sometimes vary from the official government records.

4. Key Conversions for 2026 Investors

For those who prefer international standards, here are the quick "cheat sheet" numbers:

• 1 Hectare ≈ 19.65 Ropani (or 1.47 Bigha) 
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• 1 Acre ≈ 7.95 Ropani (or 0.60 Bigha) 
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• 1 Aana is almost exactly the size of a large studio room (31.8 sq. m.). 

Expert Tip for Buyers: In 2026, many banks now require the land area to be converted into Square Meters for loan processing. Always keep a conversion table handy during your negotiation phase.