Convert Cuban Peso (CUP) to Cuban Convertible Peso (CUC)

1 cuban_peso = 1 cuban_peso

Exchange rates last updated: August 9, 2025 13:00

Conversion Formula for Cuban Peso to Cuban Convertible Peso

The formula of conversion of Cuban Peso to Cuban Convertible Peso is very simple. To convert Cuban Peso to Cuban Convertible Peso, we can use this simple formula:

1 Cuban Peso = 25.75 Cuban Convertible Peso

1 Cuban Convertible Peso = 0.0388349515 Cuban Peso

One Cuban Peso is equal to 25.75 Cuban Convertible Peso. So, we need to multiply the number of Cuban Peso by 25.75 to get the no of Cuban Convertible Peso. This formula helps when we need to change the measurements from Cuban Peso to Cuban Convertible Peso

Cuban Peso to Cuban Convertible Peso Conversion

The conversion of Cuban Peso currency to Cuban Convertible Peso currency is very simple. Since, as discussed above, One Cuban Peso is equal to 25.75 Cuban Convertible Peso. So, to convert Cuban Peso to Cuban Convertible Peso, we must multiply no of Cuban Peso to 25.75. Example:-

Cuban Peso Cuban Convertible Peso
0.01 Cuban Peso 0.2575 Cuban Convertible Peso
0.1 Cuban Peso 2.575 Cuban Convertible Peso
1 Cuban Peso 25.75 Cuban Convertible Peso
2 Cuban Peso 51.5 Cuban Convertible Peso
3 Cuban Peso 77.25 Cuban Convertible Peso
5 Cuban Peso 128.75 Cuban Convertible Peso
10 Cuban Peso 257.5 Cuban Convertible Peso
20 Cuban Peso 515 Cuban Convertible Peso
50 Cuban Peso 1,287.5 Cuban Convertible Peso
100 Cuban Peso 2,575 Cuban Convertible Peso
500 Cuban Peso 12,875 Cuban Convertible Peso
1,000 Cuban Peso 25,750 Cuban Convertible Peso

Details for Cuban Peso (CUP) Currency

Introduction : The Cuban Peso (CUP), also known as the 'moneda nacional,' is the official currency of Cuba. It is primarily used by Cuban residents for everyday transactions including groceries, utilities, and public services. Unlike the now-defunct Convertible Peso (CUC), the CUP is not tied to foreign currency values and plays a crucial role in the nation’s domestic economy. Its use reflects the country’s internal pricing system and economic structure. The CUP is issued by the Central Bank of Cuba and comes in both coins and banknotes of various denominations that serve a wide demographic for local trade and wage distribution.

History & Origin : The Cuban Peso has a long and complex history, originating in the 19th century as Cuba transitioned from Spanish colonial rule to independence. After the Cuban Revolution in 1959, the currency system was restructured to reflect socialist principles. For decades, the CUP was used alongside the Cuban Convertible Peso (CUC), a dual-currency system that created a divide between local and international transactions. The CUP remained the official domestic currency, while the CUC was pegged to the US Dollar and used for tourism and foreign goods. In January 2021, Cuba eliminated the CUC, making the CUP the sole national currency and implementing a major monetary reform to unify its economy and simplify financial operations.

Current Use : The Cuban Peso is now the single official currency used throughout Cuba following the 2021 monetary unification. It is utilized for all forms of internal trade, public salaries, transportation, local markets, and utility payments. While once overshadowed by the CUC in tourist-facing sectors, the CUP has assumed full responsibility for both domestic and international financial transactions within the country. Despite reforms, the CUP still faces challenges, including inflation and restricted convertibility on the international market. Efforts are ongoing to stabilize the currency, improve exchange rate systems, and better integrate Cuba’s economy into global financial systems while retaining sovereign monetary control.

Details of Cuba

Cuba is a Caribbean island nation located where the Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Known for its vibrant culture, revolutionary legacy, and scenic beauty, Cuba is the largest island in the Caribbean. Its capital, Havana, is famous for colorful colonial architecture, classic American cars, and a lively music and arts scene that embodies the soul of Cuban identity. The island features a mix of mountain ranges, lush valleys, pristine beaches, and extensive farmland.

Politically, Cuba is a socialist republic governed by the Communist Party since the 1959 revolution led by Fidel Castro. The revolution marked a historic shift from a US-backed dictatorship to a state-controlled socialist system, which nationalized industries and implemented widespread social reforms. While these changes brought improvements in education and healthcare, they also led to strained international relations, particularly with the United States, resulting in long-standing economic embargoes that persist today.

Cuba boasts some of the highest literacy rates and healthcare outcomes in the developing world, thanks to free and universal education and health services. Spanish is the official language, and cultural traditions blend Spanish, African, and Caribbean influences. Music, dance, and festivals are integral to Cuban life, with genres like salsa, rumba, and reggaetón dominating the airwaves and public squares.

Tourism is a major economic sector, attracting millions annually who seek Cuba’s beaches, cigars, and nostalgic charm. Yet, economic challenges remain due to limited access to international finance, resource constraints, and recent economic restructuring. Reforms aim to stimulate private enterprise and investment, though progress is cautious and measured. As Cuba navigates its path between preserving its socialist ideals and adapting to global economic demands, it continues to captivate the world with its resilience, heritage, and spirit.

Details for Cuban Convertible Peso (CUC) Currency

Introduction : The Cuban Convertible Peso (CUC) was a parallel currency once used in Cuba alongside the Cuban Peso (CUP). Known for its pegging to the US Dollar, the CUC was primarily used in foreign transactions and by tourists. Its existence created a dual economy that separated local and international sectors. It was symbolized as CUC$ or simply $. Although it no longer circulates, the CUC represented a significant period in Cuban financial history and served as an essential medium for foreign exchange, particularly when tourism began growing rapidly in the country during the early 21st century.

History & Origin : The Cuban Convertible Peso was introduced in 1994 during Cuba’s Special Period—a time of severe economic hardship following the collapse of the Soviet Union. It was meant to replace the use of the US Dollar in domestic markets and to provide Cuba with better control over its foreign reserves and economic independence. Pegged at 1:1 with the US Dollar, the CUC circulated mainly in the tourism and luxury goods sectors, whereas the Cuban Peso (CUP) remained for local use. The CUC existed for nearly three decades until it was officially phased out on January 1, 2021, as part of Cuba’s monetary unification efforts to streamline the economy and eliminate the dual-currency system.

Current Use : During its circulation, the CUC was the primary currency used in tourist zones, foreign businesses, and high-end markets in Cuba. It coexisted with the CUP, which often led to confusion, economic disparities, and inefficiencies in pricing and wages. Cuban citizens were often paid in CUP while many essential goods were priced in CUC, exacerbating income inequality. The government used the CUC to stabilize exchange operations and manage imports and exports tied to global markets. Since its withdrawal, Cuba has moved to consolidate all domestic and international transactions under the CUP, simplifying accounting and aiming to improve economic transparency and efficiency.

Details of Cuba

Cuba is the largest island in the Caribbean, located at the confluence of the Caribbean Sea, Gulf of Mexico, and Atlantic Ocean. It is known for its rich cultural heritage, tropical climate, colonial architecture, and revolutionary history. The capital, Havana, is a vibrant city featuring colorful buildings, vintage cars, and a lively arts scene. Cuba’s diverse landscapes include pristine beaches, mountainous terrain, lush valleys, and agricultural lands primarily dedicated to sugarcane, tobacco, and coffee production.

Politically, Cuba is a socialist republic led by the Communist Party since the 1959 Cuban Revolution, which brought Fidel Castro to power. The revolution reshaped the nation’s economy and foreign relations, especially with the United States, leading to decades-long embargoes and international isolation. Over the years, Cuba has maintained strong ties with other socialist or developing countries, receiving aid and support from various allies. In recent times, limited economic reforms have opened small windows for private enterprise and foreign tourism.

Despite economic challenges, Cuba has made notable achievements in healthcare and education. The country offers universal healthcare and free education, which have significantly improved literacy and life expectancy. The Cuban people are known for their resilience, warmth, and creativity. Music and dance are integral to Cuban culture, especially genres like salsa, son, and rumba. Spanish is the official language, and Roman Catholicism is the dominant religion, although Afro-Cuban spiritual traditions are also widely practiced.

Tourism remains a critical pillar of the Cuban economy, with visitors drawn to its history, nature, and cultural richness. However, ongoing economic struggles, partly due to embargoes and internal policies, have impacted growth. As Cuba navigates modernization and reform, it continues to balance tradition, ideology, and the demands of a changing global economy.

Convert Cuban Peso to Other Currencies

Cuban Peso to United Arab Emirates DirhamUnited Arab Emirates Dirham to Cuban Peso
Cuban Peso to Afghan AfghaniAfghan Afghani to Cuban Peso
Cuban Peso to Albanian LekAlbanian Lek to Cuban Peso
Cuban Peso to Armenian DramArmenian Dram to Cuban Peso
Cuban Peso to Netherlands Antillean GuilderNetherlands Antillean Guilder to Cuban Peso
Cuban Peso to Angolan KwanzaAngolan Kwanza to Cuban Peso
Cuban Peso to Argentine PesoArgentine Peso to Cuban Peso
Cuban Peso to Australian DollarAustralian Dollar to Cuban Peso
Cuban Peso to Aruban FlorinAruban Florin to Cuban Peso
Cuban Peso to Azerbaijani ManatAzerbaijani Manat to Cuban Peso
Cuban Peso to Bosnia Herzegovina Convertible MarkBosnia Herzegovina Convertible Mark to Cuban Peso
Cuban Peso to Barbadian DollarBarbadian Dollar to Cuban Peso
Cuban Peso to Bangladeshi TakaBangladeshi Taka to Cuban Peso
Cuban Peso to Bulgarian LevBulgarian Lev to Cuban Peso
Cuban Peso to Bahraini DinarBahraini Dinar to Cuban Peso
Cuban Peso to Burundian FrancBurundian Franc to Cuban Peso
Cuban Peso to Bermudan DollarBermudan Dollar to Cuban Peso
Cuban Peso to Brunei DollarBrunei Dollar to Cuban Peso
Cuban Peso to Bolivian BolivianoBolivian Boliviano to Cuban Peso
Cuban Peso to Brazilian RealBrazilian Real to Cuban Peso
Cuban Peso to Bahamian DollarBahamian Dollar to Cuban Peso
Cuban Peso to Bhutanese NgultrumBhutanese Ngultrum to Cuban Peso
Cuban Peso to Botswanan PulaBotswanan Pula to Cuban Peso
Cuban Peso to Belarusian RubleBelarusian Ruble to Cuban Peso
Cuban Peso to Belize DollarBelize Dollar to Cuban Peso
Cuban Peso to Canadian DollarCanadian Dollar to Cuban Peso
Cuban Peso to Congolese FrancCongolese Franc to Cuban Peso
Cuban Peso to Swiss FrancSwiss Franc to Cuban Peso
Cuban Peso to Chilean Unit Of Account UfChilean Unit Of Account Uf to Cuban Peso
Cuban Peso to Chilean PesoChilean Peso to Cuban Peso
Cuban Peso to Chinese Yuan OffshoreChinese Yuan Offshore to Cuban Peso
Cuban Peso to Chinese YuanChinese Yuan to Cuban Peso
Cuban Peso to Colombian PesoColombian Peso to Cuban Peso
Cuban Peso to Costa Rican ColonCosta Rican Colon to Cuban Peso
Cuban Peso to Cuban Convertible PesoCuban Convertible Peso to Cuban Peso
Cuban Peso to Cape Verdean EscudoCape Verdean Escudo to Cuban Peso
Cuban Peso to Czech Republic KorunaCzech Republic Koruna to Cuban Peso
Cuban Peso to Djiboutian FrancDjiboutian Franc to Cuban Peso
Cuban Peso to Danish KroneDanish Krone to Cuban Peso
Cuban Peso to Dominican PesoDominican Peso to Cuban Peso
Cuban Peso to Algerian DinarAlgerian Dinar to Cuban Peso
Cuban Peso to Egyptian PoundEgyptian Pound to Cuban Peso
Cuban Peso to Eritrean NakfaEritrean Nakfa to Cuban Peso
Cuban Peso to Ethiopian BirrEthiopian Birr to Cuban Peso
Cuban Peso to EuroEuro to Cuban Peso
Cuban Peso to Fijian DollarFijian Dollar to Cuban Peso
Cuban Peso to Falkland Islands PoundFalkland Islands Pound to Cuban Peso
Cuban Peso to British Pound SterlingBritish Pound Sterling to Cuban Peso
Cuban Peso to Georgian LariGeorgian Lari to Cuban Peso
Cuban Peso to Guernsey PoundGuernsey Pound to Cuban Peso
Cuban Peso to Ghanaian CediGhanaian Cedi to Cuban Peso
Cuban Peso to Gibraltar PoundGibraltar Pound to Cuban Peso
Cuban Peso to Gambian DalasiGambian Dalasi to Cuban Peso
Cuban Peso to Guinean FrancGuinean Franc to Cuban Peso
Cuban Peso to Guatemalan QuetzalGuatemalan Quetzal to Cuban Peso
Cuban Peso to Guyanaese DollarGuyanaese Dollar to Cuban Peso
Cuban Peso to Hong Kong DollarHong Kong Dollar to Cuban Peso
Cuban Peso to Honduran LempiraHonduran Lempira to Cuban Peso
Cuban Peso to Haitian GourdeHaitian Gourde to Cuban Peso
Cuban Peso to Hungarian ForintHungarian Forint to Cuban Peso
Cuban Peso to Indonesian RupiahIndonesian Rupiah to Cuban Peso
Cuban Peso to Israeli New SheqelIsraeli New Sheqel to Cuban Peso
Cuban Peso to Manx PoundManx Pound to Cuban Peso
Cuban Peso to Indian RupeeIndian Rupee to Cuban Peso
Cuban Peso to Iraqi DinarIraqi Dinar to Cuban Peso
Cuban Peso to Iranian RialIranian Rial to Cuban Peso
Cuban Peso to Icelandic KronaIcelandic Krona to Cuban Peso
Cuban Peso to Jersey PoundJersey Pound to Cuban Peso
Cuban Peso to Jamaican DollarJamaican Dollar to Cuban Peso
Cuban Peso to Jordanian DinarJordanian Dinar to Cuban Peso
Cuban Peso to Japanese YenJapanese Yen to Cuban Peso
Cuban Peso to Kenyan ShillingKenyan Shilling to Cuban Peso
Cuban Peso to Kyrgystani SomKyrgystani Som to Cuban Peso
Cuban Peso to Cambodian RielCambodian Riel to Cuban Peso
Cuban Peso to Comorian FrancComorian Franc to Cuban Peso
Cuban Peso to North Korean WonNorth Korean Won to Cuban Peso
Cuban Peso to South Korean WonSouth Korean Won to Cuban Peso
Cuban Peso to Kuwaiti DinarKuwaiti Dinar to Cuban Peso
Cuban Peso to Cayman Islands DollarCayman Islands Dollar to Cuban Peso
Cuban Peso to Kazakhstani TengeKazakhstani Tenge to Cuban Peso
Cuban Peso to Laotian KipLaotian Kip to Cuban Peso
Cuban Peso to Lebanese PoundLebanese Pound to Cuban Peso
Cuban Peso to Sri Lankan RupeeSri Lankan Rupee to Cuban Peso
Cuban Peso to Liberian DollarLiberian Dollar to Cuban Peso
Cuban Peso to Lesotho LotiLesotho Loti to Cuban Peso
Cuban Peso to Libyan DinarLibyan Dinar to Cuban Peso
Cuban Peso to Moroccan DirhamMoroccan Dirham to Cuban Peso
Cuban Peso to Moldovan LeuMoldovan Leu to Cuban Peso
Cuban Peso to Malagasy AriaryMalagasy Ariary to Cuban Peso
Cuban Peso to Macedonian DenarMacedonian Denar to Cuban Peso
Cuban Peso to Myanma KyatMyanma Kyat to Cuban Peso
Cuban Peso to Mongolian TugrikMongolian Tugrik to Cuban Peso
Cuban Peso to Macanese PatacaMacanese Pataca to Cuban Peso
Cuban Peso to Mauritanian OuguiyaMauritanian Ouguiya to Cuban Peso
Cuban Peso to Mauritian RupeeMauritian Rupee to Cuban Peso
Cuban Peso to Maldivian RufiyaaMaldivian Rufiyaa to Cuban Peso
Cuban Peso to Malawian KwachaMalawian Kwacha to Cuban Peso
Cuban Peso to Mexican PesoMexican Peso to Cuban Peso
Cuban Peso to Malaysian RinggitMalaysian Ringgit to Cuban Peso
Cuban Peso to Mozambican MeticalMozambican Metical to Cuban Peso
Cuban Peso to Namibian DollarNamibian Dollar to Cuban Peso
Cuban Peso to Nigerian NairaNigerian Naira to Cuban Peso
Cuban Peso to Nicaraguan CordobaNicaraguan Cordoba to Cuban Peso
Cuban Peso to Norwegian KroneNorwegian Krone to Cuban Peso
Cuban Peso to Nepalese RupeeNepalese Rupee to Cuban Peso
Cuban Peso to New Zealand DollarNew Zealand Dollar to Cuban Peso
Cuban Peso to Omani RialOmani Rial to Cuban Peso
Cuban Peso to Panamanian BalboaPanamanian Balboa to Cuban Peso
Cuban Peso to Peruvian Nuevo SolPeruvian Nuevo Sol to Cuban Peso
Cuban Peso to Papua New Guinean KinaPapua New Guinean Kina to Cuban Peso
Cuban Peso to Philippine PesoPhilippine Peso to Cuban Peso
Cuban Peso to Pakistani RupeePakistani Rupee to Cuban Peso
Cuban Peso to Polish ZlotyPolish Zloty to Cuban Peso
Cuban Peso to Paraguayan GuaraniParaguayan Guarani to Cuban Peso
Cuban Peso to Qatari RialQatari Rial to Cuban Peso
Cuban Peso to Romanian LeuRomanian Leu to Cuban Peso
Cuban Peso to Serbian DinarSerbian Dinar to Cuban Peso
Cuban Peso to Russian RubleRussian Ruble to Cuban Peso
Cuban Peso to Rwandan FrancRwandan Franc to Cuban Peso
Cuban Peso to Saudi RiyalSaudi Riyal to Cuban Peso
Cuban Peso to Solomon Islands DollarSolomon Islands Dollar to Cuban Peso
Cuban Peso to Seychellois RupeeSeychellois Rupee to Cuban Peso
Cuban Peso to Sudanese PoundSudanese Pound to Cuban Peso
Cuban Peso to Swedish KronaSwedish Krona to Cuban Peso
Cuban Peso to Singapore DollarSingapore Dollar to Cuban Peso
Cuban Peso to Saint Helena PoundSaint Helena Pound to Cuban Peso
Cuban Peso to Sierra Leonean LeoneSierra Leonean Leone to Cuban Peso
Cuban Peso to Somali ShillingSomali Shilling to Cuban Peso
Cuban Peso to Surinamese DollarSurinamese Dollar to Cuban Peso
Cuban Peso to South Sudanese PoundSouth Sudanese Pound to Cuban Peso
Cuban Peso to Sao Tome And Principe DobraSao Tome And Principe Dobra to Cuban Peso
Cuban Peso to Salvadoran ColonSalvadoran Colon to Cuban Peso
Cuban Peso to Syrian PoundSyrian Pound to Cuban Peso
Cuban Peso to Swazi LilangeniSwazi Lilangeni to Cuban Peso
Cuban Peso to Thai BahtThai Baht to Cuban Peso
Cuban Peso to Tajikistani SomoniTajikistani Somoni to Cuban Peso
Cuban Peso to Turkmenistani ManatTurkmenistani Manat to Cuban Peso
Cuban Peso to Tunisian DinarTunisian Dinar to Cuban Peso
Cuban Peso to Tongan PaangaTongan Paanga to Cuban Peso
Cuban Peso to Turkish LiraTurkish Lira to Cuban Peso
Cuban Peso to Trinidad And Tobago DollarTrinidad And Tobago Dollar to Cuban Peso
Cuban Peso to New Taiwan DollarNew Taiwan Dollar to Cuban Peso
Cuban Peso to Tanzanian ShillingTanzanian Shilling to Cuban Peso
Cuban Peso to Ukrainian HryvniaUkrainian Hryvnia to Cuban Peso
Cuban Peso to Ugandan ShillingUgandan Shilling to Cuban Peso
Cuban Peso to United States DollarUnited States Dollar to Cuban Peso
Cuban Peso to Uruguayan PesoUruguayan Peso to Cuban Peso
Cuban Peso to Uzbekistan SomUzbekistan Som to Cuban Peso
Cuban Peso to Venezuelan Bolivar SoberanoVenezuelan Bolivar Soberano to Cuban Peso
Cuban Peso to Vietnamese DongVietnamese Dong to Cuban Peso
Cuban Peso to Vanuatu VatuVanuatu Vatu to Cuban Peso
Cuban Peso to Samoan TalaSamoan Tala to Cuban Peso
Cuban Peso to Cfa Franc BeacCfa Franc Beac to Cuban Peso
Cuban Peso to Silver Troy OunceSilver Troy Ounce to Cuban Peso
Cuban Peso to Gold Troy OunceGold Troy Ounce to Cuban Peso
Cuban Peso to East Caribbean DollarEast Caribbean Dollar to Cuban Peso
Cuban Peso to Special Drawing RightsSpecial Drawing Rights to Cuban Peso
Cuban Peso to Cfa Franc BceaoCfa Franc Bceao to Cuban Peso
Cuban Peso to Palladium OuncePalladium Ounce to Cuban Peso
Cuban Peso to Cfp FrancCfp Franc to Cuban Peso
Cuban Peso to Platinum OuncePlatinum Ounce to Cuban Peso
Cuban Peso to Yemeni RialYemeni Rial to Cuban Peso
Cuban Peso to South African RandSouth African Rand to Cuban Peso
Cuban Peso to Zambian KwachaZambian Kwacha to Cuban Peso

FAQ on Cuban Peso (CUP) to Cuban Convertible Peso (CUC) Conversion:

What is the Symbol of Cuban Peso and Cuban Convertible Peso?

The symbol for Cuban Peso is '₱ or CUP$', and for Cuban Convertible Pesos, it is 'CUC$'. These symbols are used to denote in everyday currency analysis.

How to convert Cuban Peso(s) to Cuban Convertible Peso(es)?

To convert Cuban Peso(s) to Cuban Convertible Peso(es), multiply the number of Cuban Pesos by 25.75 because one Cuban Peso equals 25.75 Cuban Convertible Pesos.
Formula: Cuban Convertible Pesos = Cuban Pesos × 25.75.
This is a standard rule used in conversions.

How to convert Cuban Convertible Peso(es) to Cuban Peso(s) ?

To convert Cuban Convertible Peso(es) to Cuban Peso(s), divide the number of Cuban Convertible Pesos by 25.75, since, 1 Cuban Peso contains exactly 25.75 Cuban Convertible Peso(es).
Formula: Cuban Pesos = Cuban Convertible Peso(s) ÷ 25.75.
It’s a common calculation in conversions.

How many Cuban Peso(s) are these in an Cuban Convertible Peso(es) ?

There are 0.038834951456311 Cuban Pesos in one Cuban Convertible Peso. This is derived by dividing 1 Cuban Convertible Peso by 25.75, as 1 Cuban Peso equals 25.75 Cuban Convertible Peso(s).
Formula: Cuban Peso = Cuban Convertible Pesos ÷ 25.75.
It’s a precise currency conversion method.

How many Cuban Convertible Peso(es) are these in an Cuban Peso(s) ?

There are exactly 25.75 Cuban Convertible Pesos in one Cuban Peso. This is a fixed value used in the measurement system.
Formula: Cuban Convertible Peso(s) = Cuban Pesos × 25.75.
It's one of the most basic conversions.

How many Cuban Convertible Peso in 10 Cuban Peso?

There are 257.5 Cuban Convertible Pesos in 10 Cuban Pesos. This is calculated by multiplying 10 by 25.75.
Formula: 10 Cuban Pesos × 25.75 = 257.5 Cuban Convertible Pesos.
This conversion is helpful for measurements.

How many Cuban Convertible Peso(s) in 50 Cuban Peso?

There are 1287.5 Cuban Convertible Pesos in 50 Cuban Pesos. One can calculate it by multiplying 50 by 25.75.
Formula: 50 Cuban Pesos × 25.75 = 1287.5 Cuban Convertible Pesos.
This conversion is used in many applications.

How many Cuban Convertible Peso(s) in 100 Cuban Peso?

There are 2575 Cuban Convertible Peso(s) in 100 Cuban Pesos. Multiply 100 by 25.75 to get the result.
Formula: 100 Cuban Pesos × 25.75 = 2575 Cuban Convertible Peso(s).
This is a basic currency conversion formula.