Land area converter

Two systems that do not meet at a round number

Nepal measures land two different ways, and which applies depends on where the land is. The hills and the Kathmandu Valley use ropani, aana, paisa and daam. The Terai uses bigha, kattha and dhur.

Within each system the divisions are clean: 1 ropani is 16 aana, 1 bigha is 20 kattha. Between them nothing is clean. One bigha is about 13.31 ropani. That is not a rounding artefact. A ropani is a square 74 feet on a side, a bigha a square 270 feet on a side, and neither was derived from the other. A Terai seller quoting per kattha and a Valley buyer thinking per aana are about 10.6 times apart on the same ground.

Where the numbers come from

• 1 daam21.390625 sq ft (1 ropani ÷ 256)
• 1 paisa85.5625 sq ft (4 daam)
• 1 aana342.25 sq ft (4 paisa)
• 1 ropani5,476 sq ft (74 ft × 74 ft)
• 1 dhur182.25 sq ft (13.5 ft × 13.5 ft)
• 1 kattha3,645 sq ft (20 dhur)
• 1 bigha72,900 sq ft (270 ft × 270 ft)

Metric values are derived from those exact squares using the international foot (0.3048 m exactly), not stored as a pre-rounded 508.74 m². Converting through a rounded constant is how a long chain of conversions quietly drifts.

Why 2-3-1-0 as well as 2.19

No land certificate says "2.19 ropani". It says ropani, aana, paisa and daam as four whole numbers. A decimal is right for arithmetic and wrong for paperwork, so both are shown.

Area does not give you dimensions

One ropani can be a 74 ft square, or 148 ft by 37 ft, or any pair with the same product, and the road frontage differs enormously between them. Be careful with any tool offering to tell you a plot's dimensions from its area. It is guessing.

Length × width works for a rectangular plot

If the plot is rectangular, multiply its measured length by its width to get the area. For example, 60 ft × 30 ft is 1,800 sq ft. The calculator converts that area into both Nepal land systems. Do not use this shortcut for a tapered, triangular or irregular boundary.

Reading the figure off the certificate

The number on a lalpurja is written as a run of digits — 0-4-2-1, or 1-5-10 — and which system it belongs to depends on where the land is.Reading area notation on a Nepali lalpurja works through both, and the registration fee calculator covers what the transfer costs once you have the area right.

लालपुर्जाको क्षेत्रफल कसरी बुझ्ने?

नेपालमा जग्गाको नापजाँच गर्दा मुख्यतया दुईवटा प्रणालीको प्रयोग गरिन्छ। पहाड र काठमाडौं उपत्यकामा रोपनी, आना, पैसा र दाम चल्छ भने तराईमा बिघा, कट्ठा र धुरको चलन छ।

यस क्याल्कुलेटरको मद्दतले तपाईँले आफ्नो लालपुर्जामा भएको वा आफूले किन्न लागेको जग्गाको क्षेत्रफल सजिलै वर्ग फुट (Square Feet), वर्ग मिटर (Square Metres) वा अन्य कुनै एकाइमा रूपान्तरण गर्न सक्नुहुन्छ।

रोपनी-आना-पैसा-दाम प्रणाली (पहाड र उपत्यका)

पहाडमा जग्गा नाप्दा सबैभन्दा सानो एकाइ दाम हो। ४ दाम बराबर १ पैसा हुन्छ, ४ पैसा बराबर १ आना हुन्छ र १६ आना बराबर १ रोपनी हुन्छ। तपाईंको लालपुर्जामा क्षेत्रफल लेख्दा ०-४-२-१ जस्तो ढाँचामा लेखिएको हुन्छ। यसको अर्थ ० रोपनी, ४ आना, २ पैसा, १ दाम हो।

बिघा-कट्ठा-धुर प्रणाली (तराई)

तराईमा जग्गाको नाप बिघामा हुन्छ। २० धुरको १ कट्ठा हुन्छ भने २० कट्ठाको १ बिघा हुन्छ। लालपुर्जामा यसलाई १-५-१० जस्तो ढाँचामा लेखिन्छ, जसको अर्थ १ बिघा, ५ कट्ठा, १० धुर हो।