Convert Rwandan Franc (RWF) to Manx Pound (IMP)

1 rwandan_franc = 1 rwandan_franc

Exchange rates last updated: August 10, 2025 02:00

Conversion Formula for Rwandan Franc to Manx Pound

The formula of conversion of Rwandan Franc to Manx Pound is very simple. To convert Rwandan Franc to Manx Pound, we can use this simple formula:

1 Rwandan Franc = 1,943.3130212537 Manx Pound

1 Manx Pound = 0.0005145851 Rwandan Franc

One Rwandan Franc is equal to 1,943.3130212537 Manx Pound. So, we need to multiply the number of Rwandan Franc by 1,943.3130212537 to get the no of Manx Pound. This formula helps when we need to change the measurements from Rwandan Franc to Manx Pound

Rwandan Franc to Manx Pound Conversion

The conversion of Rwandan Franc currency to Manx Pound currency is very simple. Since, as discussed above, One Rwandan Franc is equal to 1,943.3130212537 Manx Pound. So, to convert Rwandan Franc to Manx Pound, we must multiply no of Rwandan Franc to 1,943.3130212537. Example:-

Rwandan Franc Manx Pound
0.01 Rwandan Franc 19.4331302125 Manx Pound
0.1 Rwandan Franc 194.3313021254 Manx Pound
1 Rwandan Franc 1,943.3130212537 Manx Pound
2 Rwandan Franc 3,886.6260425074 Manx Pound
3 Rwandan Franc 5,829.9390637611 Manx Pound
5 Rwandan Franc 9,716.5651062685 Manx Pound
10 Rwandan Franc 19,433.130212537 Manx Pound
20 Rwandan Franc 38,866.260425074 Manx Pound
50 Rwandan Franc 97,165.651062685 Manx Pound
100 Rwandan Franc 194,331.3021253699 Manx Pound
500 Rwandan Franc 971,656.5106268496 Manx Pound
1,000 Rwandan Franc 1,943,313.0212536992 Manx Pound

Details for Rwandan Franc (RWF) Currency

Introduction : The Rwandan Franc (FRw), represented by the currency code RWF, is the official currency of Rwanda. Issued and managed by the National Bank of Rwanda, the franc plays a crucial role in the country's economy and daily transactions. It is subdivided into 100 centimes and is available in various coin and banknote denominations. As a relatively stable and reliable currency in the East African region, the Rwandan franc supports the country’s ambitions toward economic modernization and growth. It reflects Rwanda’s unique identity and commitment to financial inclusion and development across its population.

History & Origin : The Rwandan Franc was first introduced in 1964, replacing the Rwanda and Burundi franc which was used when the two countries were under joint Belgian colonial rule. Upon gaining independence in 1962, Rwanda established its own monetary authority and later introduced its own national currency to mark sovereignty and control over fiscal policy. The initial transition was smooth, and the Rwandan franc quickly became the dominant medium of exchange. Over the decades, the currency has undergone several updates, particularly in its physical design and security features, to prevent counterfeiting and adapt to the evolving economy. The Rwandan central bank has consistently worked to stabilize and modernize the currency amidst regional and global economic pressures.

Current Use : The Rwandan Franc is used for all economic transactions within Rwanda. From daily purchases in local markets to government and corporate financial operations, the franc is the standard unit of exchange. While cash is still common, Rwanda has made significant strides toward cashless payments, with mobile banking and electronic transactions gaining popularity. The currency also supports tourism, agriculture, and international trade sectors, which are vital to the nation’s development. Rwanda's central bank enforces monetary policy to ensure the stability of the franc, maintain low inflation rates, and encourage sustainable economic growth.

Details of Rwanda

Rwanda, often referred to as the 'Land of a Thousand Hills,' is a small, landlocked country located in East-Central Africa. It is bordered by Uganda, Tanzania, Burundi, and the Democratic Republic of Congo. Despite its compact size, Rwanda is known for its stunning landscapes, lush green hills, and rich biodiversity, including the famous mountain gorillas that attract visitors from around the world. Kigali, the capital city, is recognized for its cleanliness, safety, and rapidly growing infrastructure.

Historically, Rwanda endured a tragic period during the 1994 genocide, which devastated the population and economy. However, the country has since undergone a remarkable transformation. Today, Rwanda is one of Africa’s fastest-growing economies, with strong emphasis on technology, sustainability, and development. The government has implemented innovative policies to promote gender equality, education, and health, making Rwanda a model of recovery and resilience in the region.

Economically, Rwanda relies heavily on agriculture, particularly coffee and tea exports. It is also expanding its reach in the service and tourism sectors, drawing visitors with its wildlife, cultural experiences, and eco-tourism efforts. The Rwandan people are known for their unity, discipline, and national pride, which has played a key role in the country’s successful rebuilding. Rwanda is an active member of the East African Community (EAC) and maintains strong diplomatic and trade ties with both regional and international partners. As it moves toward becoming a middle-income country, Rwanda continues to invest in innovation, infrastructure, and digital transformation to drive its vision for inclusive and sustainable development.

Details for Manx Pound (IMP) Currency

Introduction : The Manx Pound (IMP) is the official currency of the Isle of Man, a self-governing British Crown Dependency located in the Irish Sea. It is pegged at par with the British Pound Sterling (GBP) and is used interchangeably within the island. The Manx Pound shares the same symbol (£) and is issued in similar denominations, but features distinct Manx-themed designs. While not legal tender in the United Kingdom, it is widely accepted across the Isle of Man for all transactions, including government services, retail, and banking. The currency highlights the island's unique identity while maintaining strong economic ties with the UK.

History & Origin : The history of the Manx Pound dates back centuries, with early records of currency usage on the Isle of Man emerging in the 17th century. Initially, various forms of British and foreign coins circulated, but in 1839, the island officially adopted British currency. In 1961, the Isle of Man began issuing its own coins, and later, banknotes followed under the authority of the Isle of Man Government. Despite being pegged 1:1 to the British Pound, the Manx Pound features distinct imagery showcasing Manx culture and history. The introduction of the Manx Pound served as a statement of autonomy while still preserving economic integration with the UK.

Current Use : The Manx Pound is used exclusively on the Isle of Man for everyday transactions, including shopping, public services, and business dealings. All banks and ATMs on the island issue Manx currency, and it is accepted by all local vendors and institutions. British Pounds are also accepted interchangeably, although the reverse is not true—Manx currency is not accepted in the UK mainland. The dual-acceptance system offers convenience while highlighting the island’s independent governance. The currency's visually rich designs, which include local wildlife, historical figures, and landmarks, foster a strong sense of regional pride and cultural awareness.

Details of Isle of Man

The Isle of Man is a self-governing British Crown Dependency located in the Irish Sea between Great Britain and Ireland. Although not part of the United Kingdom, it maintains a close constitutional relationship with it. The island has its own parliament, known as the Tynwald, which is one of the oldest continuous parliaments in the world, dating back over 1,000 years.

With a population of around 85,000 people, the Isle of Man is known for its unique blend of Celtic and Norse heritage. The native Manx language, although not widely spoken, is a key part of the island's identity and cultural preservation efforts. English remains the predominant language used for daily communication, education, and government affairs.

The island boasts a diverse economy, with major sectors including financial services, tourism, information technology, and manufacturing. Its favorable tax regime has attracted numerous international businesses, making it a well-regarded offshore financial center. Tourism thrives especially during the world-famous Isle of Man TT motorcycle races, drawing thousands of visitors each year.

Scenic beauty is abundant on the island, featuring rugged coastlines, rolling hills, and medieval castles. Outdoor enthusiasts enjoy hiking, cycling, and wildlife watching. The Isle of Man is also home to a variety of museums and heritage centers that celebrate its rich history and traditions.

The Isle of Man is not a member of the European Union, and it manages its own domestic affairs independently. However, it relies on the UK for defense and international representation. Its political stability, high quality of life, and unique cultural identity make it a distinctive and respected jurisdiction in both the British Isles and the global community.

Convert Rwandan Franc to Other Currencies

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

FAQ on Rwandan Franc (RWF) to Manx Pound (IMP) Conversion:

What is the Symbol of Rwandan Franc and Manx Pound?

The symbol for Rwandan Franc is 'FRw', and for Manx Pounds, it is '£'. These symbols are used to denote in everyday currency analysis.

How to convert Rwandan Franc(s) to Manx Pound(es)?

To convert Rwandan Franc(s) to Manx Pound(es), multiply the number of Rwandan Francs by 1943.3130212537 because one Rwandan Franc equals 1943.3130212537 Manx Pounds.
Formula: Manx Pounds = Rwandan Francs × 1943.3130212537.
This is a standard rule used in conversions.

How to convert Manx Pound(es) to Rwandan Franc(s) ?

To convert Manx Pound(es) to Rwandan Franc(s), divide the number of Manx Pounds by 1943.3130212537, since, 1 Rwandan Franc contains exactly 1943.3130212537 Manx Pound(es).
Formula: Rwandan Francs = Manx Pound(s) ÷ 1943.3130212537.
It’s a common calculation in conversions.

How many Rwandan Franc(s) are these in an Manx Pound(es) ?

There are 0.00051458513840187 Rwandan Francs in one Manx Pound. This is derived by dividing 1 Manx Pound by 1943.3130212537, as 1 Rwandan Franc equals 1943.3130212537 Manx Pound(s).
Formula: Rwandan Franc = Manx Pounds ÷ 1943.3130212537.
It’s a precise currency conversion method.

How many Manx Pound(es) are these in an Rwandan Franc(s) ?

There are exactly 1943.3130212537 Manx Pounds in one Rwandan Franc. This is a fixed value used in the measurement system.
Formula: Manx Pound(s) = Rwandan Francs × 1943.3130212537.
It's one of the most basic conversions.

How many Manx Pound in 10 Rwandan Franc?

There are 19433.130212537 Manx Pounds in 10 Rwandan Francs. This is calculated by multiplying 10 by 1943.3130212537.
Formula: 10 Rwandan Francs × 1943.3130212537 = 19433.130212537 Manx Pounds.
This conversion is helpful for measurements.

How many Manx Pound(s) in 50 Rwandan Franc?

There are 97165.651062685 Manx Pounds in 50 Rwandan Francs. One can calculate it by multiplying 50 by 1943.3130212537.
Formula: 50 Rwandan Francs × 1943.3130212537 = 97165.651062685 Manx Pounds.
This conversion is used in many applications.

How many Manx Pound(s) in 100 Rwandan Franc?

There are 194331.30212537 Manx Pound(s) in 100 Rwandan Francs. Multiply 100 by 1943.3130212537 to get the result.
Formula: 100 Rwandan Francs × 1943.3130212537 = 194331.30212537 Manx Pound(s).
This is a basic currency conversion formula.