Old Belarusian Ruble (BYR) and Mauritania Ouguiya (MRO) Currency Exchange Rate Conversion Calculator

This Old Belarusian Ruble and Mauritania Ouguiya convertor is up to date with exchange rates from September 19, 2026.

Enter the amount to be converted in the box to the left of Old Belarusian Ruble. Use "Swap currencies" to make Mauritania Ouguiya the default currency. Click on Mauritania Ouguiyas or Old Belarusian Rubles to convert between that currency and all other currencies.

Old Belarusian Ruble (BYR)	Mauritania Ouguiya (MRO)

Other countries and currencies

The Old Belarusian Ruble is the currency in Belarus (BY, BLR, Belorussia). The Mauritania Ouguiya is the currency in Mauritania (MR, MRT). The symbol for BYR can be written BR. The symbol for MRO can be written UM. The Mauritania Ouguiya is divided into 5 khoums. The exchange rate for the Old Belarusian Ruble was last updated on September 18, 2026 from MSN. The exchange rate for the Mauritania Ouguiya was last updated on June 5, 2023 from MSN. The BYR conversion factor has 4 significant digits. The MRO conversion factor has 3 significant digits.