Land in Nepal's hilly districts — including the Kathmandu Valley, where plots are small and prices are high — is measured in the ropani system. One ropani is exactly 5,476 square feet, which is precisely a 74 ft × 74 ft square (74² = 5,476). It subdivides by fours: 1 ropani = 16 aana, 1 aana = 4 paisa, 1 paisa = 4 daam.
Because valley real estate is priced per aana, converting to square feet matters for anyone comparing against construction costs or against Terai land priced per kattha. One aana is 342.25 sq ft — an 18.5 ft × 18.5 ft square. A typical 4-aana house plot in Kathmandu is therefore 1,369 sq ft of land. Our converter accepts combined Ropani-Aana-Paisa-Daam entries exactly as they appear in a Nepali land certificate (lalpurja).