Convert Saudi Riyal (SAR) to Canadian Dollar (CAD)

1 saudi_riyal = 1 saudi_riyal

Exchange rates last updated: February 12, 2026 00:00

Conversion Formula for Saudi Riyal to Canadian Dollar

The formula of conversion of Saudi Riyal to Canadian Dollar is very simple. To convert Saudi Riyal to Canadian Dollar, we can use this simple formula:

1 Saudi Riyal = 2.762743076 Canadian Dollar

1 Canadian Dollar = 0.361959101 Saudi Riyal

One Saudi Riyal is equal to 2.762743076 Canadian Dollar. So, we need to multiply the number of Saudi Riyal by 2.762743076 to get the no of Canadian Dollar. This formula helps when we need to change the measurements from Saudi Riyal to Canadian Dollar

Saudi Riyal to Canadian Dollar Conversion

The conversion of Saudi Riyal currency to Canadian Dollar currency is very simple. Since, as discussed above, One Saudi Riyal is equal to 2.762743076 Canadian Dollar. So, to convert Saudi Riyal to Canadian Dollar, we must multiply no of Saudi Riyal to 2.762743076. Example:-

Saudi Riyal Canadian Dollar
0.01 Saudi Riyal 0.0276274308 Canadian Dollar
0.1 Saudi Riyal 0.2762743076 Canadian Dollar
1 Saudi Riyal 2.762743076 Canadian Dollar
2 Saudi Riyal 5.525486152 Canadian Dollar
3 Saudi Riyal 8.288229228 Canadian Dollar
5 Saudi Riyal 13.8137153801 Canadian Dollar
10 Saudi Riyal 27.6274307602 Canadian Dollar
20 Saudi Riyal 55.2548615203 Canadian Dollar
50 Saudi Riyal 138.1371538008 Canadian Dollar
100 Saudi Riyal 276.2743076017 Canadian Dollar
500 Saudi Riyal 1,381.3715380083 Canadian Dollar
1,000 Saudi Riyal 2,762.7430760165 Canadian Dollar

Details for Saudi Riyal (SAR) Currency

Introduction : The Saudi Riyal (SAR), symbolized as ﷼, is the official currency of the Kingdom of Saudi Arabia. Managed by the Saudi Central Bank (SAMA), the riyal is subdivided into 100 halalas. It is used for all forms of transactions within the country and plays a significant role in the oil-driven economy. The Saudi Riyal is known for its stability and is often pegged to the US dollar, reinforcing the country's financial strength and global trade relationships. With modern banknotes and coins in circulation, the riyal reflects Saudi Arabia's cultural heritage and economic resilience.

History & Origin : The Saudi Riyal has a history dating back to the early 20th century when the Kingdom of Saudi Arabia was formed in 1932. Prior to the riyal, trade in the region was conducted using a mix of foreign coins and currencies. The riyal was officially introduced to unify the monetary system and support the newly founded state's economy. Initially based on silver coins, the currency later transitioned into banknotes and more advanced denominations. Over time, the riyal became pegged to the US dollar at a fixed rate, enhancing stability and simplifying international transactions, especially in the oil and energy sectors.

Current Use : The Saudi Riyal is the exclusive legal tender used in Saudi Arabia. It is used across all sectors of the economy—from local purchases in souks and supermarkets to large-scale oil export contracts. The currency is also vital for the millions of Muslim pilgrims visiting the country annually for Hajj and Umrah. As Saudi Arabia diversifies its economy through its Vision 2030 initiative, the riyal continues to support infrastructure, technology, tourism, and renewable energy projects. Digital payment systems are growing, but cash still plays a prominent role in daily life across cities and rural areas alike.

Details of Saudi Arabia

Saudi Arabia, located in the Middle East on the Arabian Peninsula, is the largest country in the region and one of the most influential nations in the Islamic world. It shares borders with Jordan, Iraq, Kuwait, Qatar, the United Arab Emirates, Oman, and Yemen, and is bounded by the Red Sea to the west and the Persian Gulf to the east. The country is best known as the birthplace of Islam and home to the religion’s two holiest cities, Mecca and Medina, which draw millions of pilgrims each year.

Economically, Saudi Arabia is a global powerhouse due to its vast oil reserves, making it a leading member of OPEC and a major exporter of petroleum. The economy is heavily reliant on oil, but in recent years, the government has launched Vision 2030, a strategic framework aimed at reducing dependence on oil, developing public service sectors, and diversifying into areas like tourism, entertainment, and technology. Riyadh, the capital city, is a growing hub for finance and development.

Culturally, Saudi Arabia holds deep-rooted traditions linked to Bedouin heritage and Islamic practices. However, it is undergoing significant social reforms, including the promotion of women's rights and the opening of new entertainment and cultural venues. The country’s landscape ranges from vast deserts like the Rub' al Khali to dramatic mountain ranges and beautiful coastlines. With its strategic geopolitical position, historical significance, and ambitious development plans, Saudi Arabia continues to be a central player in regional and global affairs.

Details for Canadian Dollar (CAD) Currency

Introduction : The Canadian Dollar (CAD), symbolized as $, is the official currency of Canada and is commonly referred to as the 'loonie'—a nickname derived from the image of a loon on the one-dollar coin. The CAD is subdivided into 100 cents and is issued by the Bank of Canada. As one of the world’s most stable and widely traded currencies, the Canadian Dollar plays a central role in both domestic commerce and international trade. Known for its reliability and transparency, the CAD supports a wide range of economic activities across Canada’s vast and diverse economy.

History & Origin : The Canadian Dollar was established in 1858 when Canada adopted a decimal monetary system, replacing the British pound and other colonial currencies. Initially pegged to the U.S. dollar and later to gold, Canada moved to a floating exchange rate system in the early 1970s. Over the years, the currency has undergone significant changes in both design and material, transitioning from paper to polymer notes for enhanced durability and security. The Bank of Canada, founded in 1935, manages the issuance of banknotes and monetary policy, ensuring the CAD remains a stable and trusted currency in the global financial system.

Current Use : The Canadian Dollar is used throughout Canada for all financial transactions, including retail, business, banking, and government operations. It is available in both coins and banknotes, with denominations ranging from 5 cents to $100. Widely accepted in both physical and digital formats, the CAD supports a highly developed banking and fintech ecosystem. Internationally, it is held as a reserve currency and is actively traded in forex markets due to Canada’s economic strength and resource exports. Whether for local purchases or international dealings, the CAD is a cornerstone of economic life in Canada.

Details of Canada

Canada is the second-largest country in the world by land area, stretching from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic. Known for its stunning landscapes, multicultural society, and high standard of living, Canada offers a rich blend of urban innovation and natural beauty. The country is made up of ten provinces and three territories, with Ottawa serving as its capital city and Toronto as its largest metropolitan center.

Canada is a parliamentary democracy and a constitutional monarchy, with the British monarch as its ceremonial head of state. Its political system values transparency, inclusiveness, and diversity. English and French are both official languages, reflecting its colonial heritage and commitment to bilingualism. The country prides itself on its cultural mosaic, with large immigrant populations contributing to the vibrancy and richness of Canadian life.

Canada's economy is one of the largest in the world, driven by natural resources, manufacturing, technology, and services. It is a global leader in sectors such as energy, mining, and finance. The country also places strong emphasis on environmental sustainability and innovation. Healthcare and education systems are publicly funded and highly regarded globally, ensuring a high quality of life for its residents.

Tourism in Canada is thriving, thanks to its breathtaking national parks, cosmopolitan cities, and historical landmarks. From the majestic Rocky Mountains and Niagara Falls to cultural festivals in Montreal and Vancouver, Canada offers a wide range of experiences. Its welcoming attitude, safety, and infrastructure make it a top destination not only for travelers but also for international students and migrants seeking opportunity and stability.

Convert Saudi Riyal to Other Currencies

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

FAQ on Saudi Riyal (SAR) to Canadian Dollar (CAD) Conversion:

What is the Symbol of Saudi Riyal and Canadian Dollar?

The symbol for Saudi Riyal is '﷼', and for Canadian Dollars, it is '$'. These symbols are used to denote in everyday currency analysis.

How to convert Saudi Riyal(s) to Canadian Dollar(es)?

To convert Saudi Riyal(s) to Canadian Dollar(es), multiply the number of Saudi Riyals by 2.7627430760165 because one Saudi Riyal equals 2.7627430760165 Canadian Dollars.
Formula: Canadian Dollars = Saudi Riyals × 2.7627430760165.
This is a standard rule used in conversions.

How to convert Canadian Dollar(es) to Saudi Riyal(s) ?

To convert Canadian Dollar(es) to Saudi Riyal(s), divide the number of Canadian Dollars by 2.7627430760165, since, 1 Saudi Riyal contains exactly 2.7627430760165 Canadian Dollar(es).
Formula: Saudi Riyals = Canadian Dollar(s) ÷ 2.7627430760165.
It’s a common calculation in conversions.

How many Saudi Riyal(s) are these in an Canadian Dollar(es) ?

There are 0.36195910096782 Saudi Riyals in one Canadian Dollar. This is derived by dividing 1 Canadian Dollar by 2.7627430760165, as 1 Saudi Riyal equals 2.7627430760165 Canadian Dollar(s).
Formula: Saudi Riyal = Canadian Dollars ÷ 2.7627430760165.
It’s a precise currency conversion method.

How many Canadian Dollar(es) are these in an Saudi Riyal(s) ?

There are exactly 2.7627430760165 Canadian Dollars in one Saudi Riyal. This is a fixed value used in the measurement system.
Formula: Canadian Dollar(s) = Saudi Riyals × 2.7627430760165.
It's one of the most basic conversions.

How many Canadian Dollar in 10 Saudi Riyal?

There are 27.627430760165 Canadian Dollars in 10 Saudi Riyals. This is calculated by multiplying 10 by 2.7627430760165.
Formula: 10 Saudi Riyals × 2.7627430760165 = 27.627430760165 Canadian Dollars.
This conversion is helpful for measurements.

How many Canadian Dollar(s) in 50 Saudi Riyal?

There are 138.13715380083 Canadian Dollars in 50 Saudi Riyals. One can calculate it by multiplying 50 by 2.7627430760165.
Formula: 50 Saudi Riyals × 2.7627430760165 = 138.13715380083 Canadian Dollars.
This conversion is used in many applications.

How many Canadian Dollar(s) in 100 Saudi Riyal?

There are 276.27430760165 Canadian Dollar(s) in 100 Saudi Riyals. Multiply 100 by 2.7627430760165 to get the result.
Formula: 100 Saudi Riyals × 2.7627430760165 = 276.27430760165 Canadian Dollar(s).
This is a basic currency conversion formula.