Buying, selling, or registering land in Nepal almost always means juggling two worlds at once: the traditional Ropani-Aana-Paisa-Daam system used across the hills and the Bigha-Kattha-Dhur system used across the Terai plains — alongside the square feet, square meter, acre, and hectare figures that banks, valuers, and international buyers expect. Getting even one unit wrong on a lalpurja, a loan application, or a property listing can cost you real money or trigger a boundary dispute later. Below is a free, instant, survey-grade Nepal Land Area Converter, followed by a complete visual guide to every traditional and international unit you're likely to encounter.

Why Nepal Has Two Different Land Measurement Systems

Nepal's land measurement traditions grew out of two very different landscapes. In the hills and mountains — including the Kathmandu Valley — surveyors historically used the Ropani-Aana-Paisa-Daam system, a base-16 hierarchy well suited to smaller, terraced, irregularly shaped plots. Across the flat Terai plains bordering India, the Bigha-Kattha-Dhur system took hold instead — a base-20 hierarchy better suited to large, rectangular agricultural fields. Both systems remain legally valid today and both still appear on land ownership certificates (lalpurja), which is exactly why a reliable converter between them, and between them and international units, is so useful.

The Ropani System: Ropani, Aana, Paisa and Daam

The Ropani system is a base-16 hierarchy: one Ropani equals 16 Aana, one Aana equals 4 Paisa, and one Paisa equals 4 Daam. In metric terms, one Ropani is approximately 508.72 square metres — close to 5,476 square feet. Aana is the unit you'll see most often on urban Kathmandu Valley listings, since a typical residential plot runs 3 to 8 Aana rather than a full Ropani. Paisa and Daam show up mainly on subdivided or irregular residual parcels.

The Bigha System: Bigha, Kattha and Dhur

The Bigha system is a base-20 hierarchy: one Bigha equals 20 Kattha, and one Kattha equals 20 Dhur. One Bigha works out to roughly 6,772.63 square metres, or about 1.67 acres — a sizeable agricultural plot. Kattha is the everyday unit for residential Terai plots, playing a role similar to Aana in the hills, while Dhur is typically reserved for narrow roadside strips or small boundary adjustments. Note that some Mid- and Far-Western districts use the names Biswa and Dhurki in place of Kattha and Dhur — the hierarchy is the same, only the local vocabulary changes.

Quick Conversion Reference

If you only remember a handful of figures, remember these. They cover the majority of everyday Nepal property conversations, from a small Kathmandu plot quoted in Aana to a large Terai holding quoted in Bigha.

How to Use the Converter Above in 4 Simple Steps

The calculator at the top of this page is built to feel like a surveyor's field book: enter a value, pick your units, and read the result instantly — no page reload, no sign-up, and it keeps working even if your connection drops.

Worked Example: Reading a Real Land Deed

Suppose a Kathmandu Valley lalpurja lists a plot as "4 Aana 2 Paisa." Converting each part to square metres and adding them together gives roughly 143.1 square metres, or about 1,540 square feet — useful when comparing the listing to a square-foot-priced apartment nearby. Similarly, a Terai deed listing "2 Bigha 5 Kattha" converts to roughly 15,238 square metres, or about 3.77 acres — the figure a bank or international investor will actually want to see. The converter above handles both examples instantly, including the full traditional breakdown.

Common Land Measurement Mistakes to Avoid

The three mistakes we see most often when people convert Nepali land units on their own:

1. Mixing up Aana and Kattha. Both are commonly described as "the small unit," but they belong to entirely different systems and are not the same size.

2. Rounding too aggressively. On subdivided or boundary-adjustment plots, rounding to whole numbers can create a real gap between the paper figure and the actual survey — always use at least 3–4 decimal places for legal purposes.

3. Assuming one national figure for every regional unit. Kani and, to a lesser extent, Bigha can carry slightly different local factors from district to district — always confirm with your local Malpot (land revenue) office before a legal transaction.

Property Registration and Survey Tips

Nepal's land registration process typically expects area in both the traditional local unit and square metres, so it helps to have both figures ready before you visit the Malpot office. Keep your kitta number (the unique parcel identifier from the cadastral survey map, or napi naksha) on hand, and double-check that the boundary description on your citizenship-linked ownership documents matches your certificate exactly. If you're buying land, ask to see the most recent field survey rather than relying solely on an older deed's stated area — Nepal's cadastral resurveys occasionally update figures from earlier, less precise measurements.

Frequently Asked Questions

How many square feet are in 1 Ropani?
1 Ropani is approximately 5,476 square feet (508.72 square metres).

How many Kattha are in 1 Bigha?
1 Bigha equals 20 Kattha, with each Kattha approximately 338.63 square metres.

Is 1 Bigha the same everywhere in Nepal?
6,772.63 square metres is the most widely used reference figure, but some districts have historically applied slightly different local factors — always confirm with your district Malpot office for legal transactions.

How many Ropani are in 1 hectare?
1 hectare is approximately 19.66 Ropani.

Does this converter work without internet access?
Yes — once the page has loaded, all conversion math runs locally in your browser, so it keeps working even offline.

Final Thoughts

Whether you're comparing a Kathmandu Valley plot in Aana, a Terai field in Bigha, or matching either against an international listing in square feet or acres, accurate unit conversion is the first step toward a fair deal and a clean registration process. Bookmark this page, use the calculator above whenever a number needs checking, and always confirm final figures with a certified field survey before signing anything.