Convert Cfp Franc (XPF) to Hong Kong Dollar (HKD)

1 cfp_franc = 1 cfp_franc

Exchange rates last updated: March 31, 2026 01:00

Conversion Formula for Cfp Franc to Hong Kong Dollar

The formula of conversion of Cfp Franc to Hong Kong Dollar is very simple. To convert Cfp Franc to Hong Kong Dollar, we can use this simple formula:

1 Cfp Franc = 13.2696439964 Hong Kong Dollar

1 Hong Kong Dollar = 0.075359972 Cfp Franc

One Cfp Franc is equal to 13.2696439964 Hong Kong Dollar. So, we need to multiply the number of Cfp Franc by 13.2696439964 to get the no of Hong Kong Dollar. This formula helps when we need to change the measurements from Cfp Franc to Hong Kong Dollar

Cfp Franc to Hong Kong Dollar Conversion

The conversion of Cfp Franc currency to Hong Kong Dollar currency is very simple. Since, as discussed above, One Cfp Franc is equal to 13.2696439964 Hong Kong Dollar. So, to convert Cfp Franc to Hong Kong Dollar, we must multiply no of Cfp Franc to 13.2696439964. Example:-

Cfp Franc Hong Kong Dollar
0.01 Cfp Franc 0.13269644 Hong Kong Dollar
0.1 Cfp Franc 1.3269643996 Hong Kong Dollar
1 Cfp Franc 13.2696439964 Hong Kong Dollar
2 Cfp Franc 26.5392879929 Hong Kong Dollar
3 Cfp Franc 39.8089319893 Hong Kong Dollar
5 Cfp Franc 66.3482199821 Hong Kong Dollar
10 Cfp Franc 132.6964399643 Hong Kong Dollar
20 Cfp Franc 265.3928799285 Hong Kong Dollar
50 Cfp Franc 663.4821998214 Hong Kong Dollar
100 Cfp Franc 1,326.9643996427 Hong Kong Dollar
500 Cfp Franc 6,634.8219982136 Hong Kong Dollar
1,000 Cfp Franc 13,269.6439964272 Hong Kong Dollar

Details for CFP Franc (XPF) Currency

Introduction : The CFP Franc (XPF), symbolized as ₣, is the official currency used in the French overseas collectivities of the Pacific, including New Caledonia, French Polynesia, and Wallis and Futuna. Issued by the Institut d’Émission d’Outre-Mer (IEOM), the CFP Franc is pegged to the euro, ensuring currency stability and facilitating economic ties with mainland France. Although not a globally traded currency, it plays a crucial role in local economies by supporting commerce, tourism, and government operations. The CFP Franc’s reliability and connection to the eurozone help ensure financial security for these remote island economies.

History & Origin : The CFP Franc was introduced in 1945 as part of France’s effort to stabilize its colonial currencies in the wake of World War II. Originally standing for 'Colonies Françaises du Pacifique', its meaning has since evolved to 'Change Franc Pacifique' to reflect the modern political relationship between France and its overseas collectivities. Initially pegged to the French franc, the XPF was revalued in 1949 and again in 1999, aligning it with the euro at a fixed exchange rate. The IEOM, based in Nouméa, was established to manage the issuance and regulation of the currency. Despite discussions of currency unification or euro adoption, the CFP Franc remains a vital symbol of financial and administrative autonomy within the French Republic.

Current Use : The CFP Franc is used exclusively in the French Pacific territories and is not accepted elsewhere. It serves as the primary medium of exchange for residents and tourists in New Caledonia, French Polynesia, and Wallis and Futuna. All economic activities, including government salaries, retail transactions, and banking operations, are conducted in XPF. Because it is pegged to the euro, the CFP Franc benefits from exchange rate stability, which is essential for these island economies that rely heavily on imports, tourism, and financial transfers from mainland France. The IEOM ensures smooth monetary policy implementation, including efforts to modernize banking services and encourage digital payment systems.

Details of French Pacific Territories (New Caledonia, French Polynesia, Wallis and Futuna)

The CFP Franc is used across three French overseas collectivities in the Pacific: **New Caledonia**, **French Polynesia**, and **Wallis and Futuna**. These territories, while politically affiliated with France, each enjoy a unique degree of autonomy and cultural distinction, with diverse histories, languages, and economic profiles. Despite their geographic isolation, they are closely connected to the French Republic through administrative, legal, and financial systems.

**New Caledonia**, located east of Australia, is known for its mineral wealth, especially nickel, and has experienced growing political movements seeking greater independence. It is the most economically developed of the three territories, with a population that blends indigenous Kanak traditions with French and multicultural influences. Nouméa, the capital, is a regional economic hub in the South Pacific.

**French Polynesia**, which includes Tahiti, is world-famous for its breathtaking lagoons, overwater bungalows, and vibrant Polynesian culture. The economy here is largely driven by tourism, pearl farming, and some light manufacturing. Despite its reliance on imports, French financial support helps maintain infrastructure, education, and healthcare systems. Papeete, the capital, is the administrative and economic center.

**Wallis and Futuna**, the smallest and most remote of the three, is located northeast of Fiji. It has a largely rural economy based on subsistence agriculture and remittances from expatriates. The traditional chiefly system continues to play a significant role in governance and community life. French administration ensures the provision of public services and legal order.

All three territories benefit from French citizenship, representation in French institutions, and the use of the CFP Franc, which links their local economies to the stability of the eurozone. While each has its own challenges, such as geographic isolation and economic vulnerability, they remain culturally rich and strategically significant parts of the wider French Pacific presence.

Details for Hong Kong Dollar (HKD) Currency

Introduction : The Hong Kong Dollar (HKD) is the official currency of the Hong Kong Special Administrative Region (SAR) of China. It is denoted by the symbol HK$ and is widely used in both domestic and international financial markets. The HKD is divided into 100 cents and issued by three major commercial banks—HSBC, Standard Chartered, and Bank of China—under the supervision of the Hong Kong Monetary Authority. Its value is pegged to the US Dollar through a currency board system, which supports exchange rate stability. As one of the most traded currencies globally, the HKD plays a crucial role in global finance and commerce.

History & Origin : The Hong Kong Dollar was introduced in the 1860s during British colonial rule, replacing various currencies in circulation, including the Mexican peso and Spanish dollar. Initially issued by private banks, the HKD evolved into a fully regulated currency system under British administration. In 1983, the government established a linked exchange rate system, pegging the HKD to the US Dollar at around 7.8 HKD to 1 USD—a move that has largely remained unchanged to date. Even after the 1997 handover of Hong Kong to China, the region retained full autonomy over its monetary policy, allowing the HKD to remain distinct from the Chinese yuan (CNY).

Current Use : The HKD is used for all financial transactions within Hong Kong, from retail shopping and transportation to large-scale real estate deals and international business transactions. It is also accepted in nearby Macau and by some establishments in mainland China. The fixed peg to the US Dollar provides confidence and predictability in currency value, making it attractive for foreign investors and tourists. Hong Kong’s financial infrastructure, including digital wallets, contactless cards, and advanced banking systems, ensures the HKD is seamlessly integrated into both traditional and modern economies. It remains a cornerstone of Hong Kong’s status as a global financial center.

Details of Hong Kong

Hong Kong is a Special Administrative Region (SAR) of China, located on the southeastern coast of the country. Known for its iconic skyline, bustling harbor, and dynamic blend of East and West, Hong Kong operates under the "one country, two systems" principle, allowing it to maintain its own legal, economic, and political systems separate from mainland China.

The city is made up of Hong Kong Island, Kowloon Peninsula, the New Territories, and over 200 smaller islands. Its total population exceeds 7 million, making it one of the most densely populated regions in the world. Despite limited land, Hong Kong has developed into one of the most important financial and trade hubs globally.

Hong Kong’s economy is highly service-oriented, with finance, shipping, real estate, and tourism being the major sectors. It boasts one of the busiest container ports in the world and has a vibrant stock exchange. The city’s low tax rates, robust legal system, and ease of doing business attract global enterprises and investors.

Culturally, Hong Kong is a fusion of Chinese traditions and British colonial influences, visible in its language, food, architecture, and festivals. Both Cantonese and English are official languages, and the city celebrates traditional Chinese festivals alongside Western holidays. Popular attractions include Victoria Peak, Hong Kong Disneyland, and the Temple Street Night Market.

Despite facing political challenges in recent years, Hong Kong continues to be a resilient, innovative, and globally connected city. Its public transportation is world-class, education and healthcare systems are highly regarded, and its cosmopolitan nature makes it a melting pot for people from all walks of life. Hong Kong remains a unique and influential player on the global stage.

Convert Cfp Franc to Other Currencies

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

FAQ on Cfp Franc (XPF) to Hong Kong Dollar (HKD) Conversion:

What is the Symbol of Cfp Franc and Hong Kong Dollar?

The symbol for Cfp Franc is '₣', and for Hong Kong Dollars, it is 'HK$'. These symbols are used to denote in everyday currency analysis.

How to convert Cfp Franc(s) to Hong Kong Dollar(es)?

To convert Cfp Franc(s) to Hong Kong Dollar(es), multiply the number of Cfp Francs by 13.269643996427 because one Cfp Franc equals 13.269643996427 Hong Kong Dollars.
Formula: Hong Kong Dollars = Cfp Francs × 13.269643996427.
This is a standard rule used in conversions.

How to convert Hong Kong Dollar(es) to Cfp Franc(s) ?

To convert Hong Kong Dollar(es) to Cfp Franc(s), divide the number of Hong Kong Dollars by 13.269643996427, since, 1 Cfp Franc contains exactly 13.269643996427 Hong Kong Dollar(es).
Formula: Cfp Francs = Hong Kong Dollar(s) ÷ 13.269643996427.
It’s a common calculation in conversions.

How many Cfp Franc(s) are these in an Hong Kong Dollar(es) ?

There are 0.075359971998438 Cfp Francs in one Hong Kong Dollar. This is derived by dividing 1 Hong Kong Dollar by 13.269643996427, as 1 Cfp Franc equals 13.269643996427 Hong Kong Dollar(s).
Formula: Cfp Franc = Hong Kong Dollars ÷ 13.269643996427.
It’s a precise currency conversion method.

How many Hong Kong Dollar(es) are these in an Cfp Franc(s) ?

There are exactly 13.269643996427 Hong Kong Dollars in one Cfp Franc. This is a fixed value used in the measurement system.
Formula: Hong Kong Dollar(s) = Cfp Francs × 13.269643996427.
It's one of the most basic conversions.

How many Hong Kong Dollar in 10 Cfp Franc?

There are 132.69643996427 Hong Kong Dollars in 10 Cfp Francs. This is calculated by multiplying 10 by 13.269643996427.
Formula: 10 Cfp Francs × 13.269643996427 = 132.69643996427 Hong Kong Dollars.
This conversion is helpful for measurements.

How many Hong Kong Dollar(s) in 50 Cfp Franc?

There are 663.48219982136 Hong Kong Dollars in 50 Cfp Francs. One can calculate it by multiplying 50 by 13.269643996427.
Formula: 50 Cfp Francs × 13.269643996427 = 663.48219982136 Hong Kong Dollars.
This conversion is used in many applications.

How many Hong Kong Dollar(s) in 100 Cfp Franc?

There are 1326.9643996427 Hong Kong Dollar(s) in 100 Cfp Francs. Multiply 100 by 13.269643996427 to get the result.
Formula: 100 Cfp Francs × 13.269643996427 = 1326.9643996427 Hong Kong Dollar(s).
This is a basic currency conversion formula.