# Cambodian riel

The riel (/riˈɛl/; Khmer: រៀល, romanized: riĕl; sign: ៛; code: KHR) is the currency of Cambodia. There have been two distinct riel, the first issued between 1953 and May 1975. Between 1975 and 1980, the country had no monetary system. A second currency, also named "riel", has been issued since 20 March 1980. Since the late 1990s, the riel has had an unofficial fixed exchange rate of 4,100:1 with the United States dollar, Cambodia's second de facto currency for commercial transactions.
Popular belief suggests that the name of the currency comes from the Mekong river fish riĕl ("small fish" in Khmer). It is more likely that it derives from the high-silver content Spanish-American dollar, whose value is eight reales, a coin widely used for international trade in Asia and the Americas from the 16th to 19th centuries.

## Concurrent use with foreign currencies

In rural areas the riel is used for virtually all purchases, large and small. However, the United States dollar is also used, particularly in urban Cambodia and tourist areas. In areas near the Thai border, the Thai baht is also accepted.
Dollarization started in the 1980s and continued to the early 90s when the United Nations contributed humanitarian aid, refugees began sending remittances home, and inflation as high as 177% per year eroded confidence in the riel. From 1991–1993, the United Nations Transitional Authority in Cambodia stationed 22,000 personnel throughout Cambodia, whose spending represented a large part of the Cambodian economy.
While the riel remains in common use in the provinces, the major cities and tourist areas heavily use the U.S. dollar. The latter is dispensed in ATMs, accepted in virtually all purchases, and USD quotations are required to price hotel rooms, airline tickets and significant financial transactions. The exchange rate of 4,000 KHR/US$ is widely known and employed frequently in retail trade, with riel paid out for change in fractions of a dollar.
In June 2020, the National Bank of Cambodia announced the phaseout from wide circulation of small U.S. dollar banknotes of $1, $2 and $5. This is aimed at reducing the cost of keeping the smaller US notes in circulation, as well as increasing the use of the riel in lieu of these notes. No fees were to be charged to collect these small notes before 31 August 2020, but after that date banks were expected to incur costs of transporting these notes.

## History
### Cambodian tical

Prior to the year 1875, the tical was the currency of Cambodia as well as Siam and Laos. However, as a result of French intervention in the region, the tical in Cambodia was replaced in 1875 by the Cambodian franc.

### Cambodian franc

The franc was the currency of Cambodia between 1875 and 1885. It was equal to the French franc and was similarly subdivided into 100 centimes. It replaced the tical and was replaced by the piastre.

### French Indochinese piastre

The piastre was introduced in French Indochina in 1885 at par with the Spanish-American silver dollar, and was in use until 1952.

### First riel (1953–1975)

In 1953, the Cambodia branch of the Institut d'Émission des États du Cambodge, du Laos et du Viet-nam issued notes dual denominated in piastre and riel with the riel being at par with the piastre. At the same time, the two other branches of the Institut had similar arrangements with the đồng in South Vietnam and the kip in Laos. The piastre itself was derived from Spanish pieces of eight (pesos).
The riel was at first subdivided into 100 centimes (abbreviated to cent. on the coins) but this changed in 1959 to 100 sen (សេន). For the first few years, the riel and piastre circulated alongside each other. The first riel banknotes were also denominated in piastres.
* First issue, 1955–56: 1 riel, 5 riels, 10 riels, 50 riels.
* Second issue, 1956: 1 riel, 20 riels, 50 riels, 100 riels, 500 riels.
* Third issue, 1956: 100 riels, 500 riels.
* Fourth issue, 1963: 5 riels, 10 riels, 100 riels.
* Fifth issue, 1972: 100 riels*, 500 riels, 1,000 riels*, 5,000 riels*. (* Unissued.)
* 1 riel
* 1 riel
* 10 riels
* 10 riels
* 500 riels
* 500 riels
Coins: The 10, 20 and 50 centimes of 1953 and sen coins were minted in aluminum and were the same size as the corresponding att and xu (su) coins of Laos and South Vietnam (though without the holes in the Lao coins). A 1 riel coin about the size of a U.S. nickel was to be issued in 1970, as part of the United Nations' Food and Agriculture Organization's coin program, but was not released, perhaps due to the overthrow of the government of Norodom Sihanouk by Lon Nol.

### Khmer Rouge (1975–1980, 1993–1999)

Although the Khmer Rouge printed banknotes, they were not issued as money was abolished after the Khmer Rouge took control of the country.
* Sixth issue, 1975: 0.1 riel (1 kak), 0.5 riels (5 kaks), 1 riel, 5 riels, 10 riels, 50 riels, 100 riels.
In 1993, they printed a series of coloured banknotes for limited use on territories controlled by them.
* Regional issue, 1993: 5 riels, 10 riels, 20 riels, 50 riels, 100 riels

## Second riel (1980–present)

After the Vietnamese attacked Khmer Rouge in 1978, the riel was re-established as Cambodia's national currency on 20 March 1980, initially at a value of 4 riels = 1 U.S. dollar. It is subdivided into 10 kaks (from the Hokkien 角 kak) or 100 sens (from the French cent). Because there was no money for it to replace and a severely disrupted economy, the central government gave away the new money to the populace in order to encourage its use. Near the same time, the United Nations gave humanitarian aid to Cambodia in U.S. dollars, and placed people in Cambodia to get it started, and the populace prefer the more stable U.S. dollar. As the supply of riels grew rapidly during the early 1990s, the riel devalued from 4 riels to 1 dollar in 1980 to a rate of around 4000 KHR/USD in the 2000s and around 4100 KHR/USD in the 2020s, where it has remained stable ever since.
* Seventh issue, 1979: 0.1 riel (1 kak), 0.2 riels (2 kaks), 0.5 riels (5 kaks), 1 riel, 5 riels, 10 riels, 20 riels, 50 riels.
* Eighth issue, 1987: 5 riels, 10 riels.
* Ninth issue, 1990–92: 50 riels, 100 riels, 500 riels.
* Tenth issue, 1992–93: 200 riels, 1,000 riels*, 2,000 riels*. (* Unissued.)
* Eleventh issue, 1995: 1,000 riels, 2,000 riels, 5,000 riels, 10,000 riels, 20,000 riels, 50,000 riels, 100,000 riels.
* Twelfth issue, 1995–99: 100 riels, 200 riels, 500 riels, 1,000 riels.
* Thirteenth issue, 2001–07: 50 riels, 100 riels, 500 riels, 1,000 riels, 2,000 riels, 5,000 riels, 10,000 riels, 50,000 riels.
* Fourteenth issue; 2008: 20,000 riels
* Fiftheeth issue; 2012–22: 100 riels, 200 riels, 500 riels, 1,000 riels, 2,000 riels, 5,000 riels, 10,000 riels, 20,000 riels, 50,000 riels, 100,000 riels.
* Commemorative issue; 2012-2024: 1,000 riels, 2,000 riels, 15,000 riels, 30,000 riels, 200,000 riels

### Banknotes

* 100 riels (2001-08-09 and 2015-01-14)
* 200 riels (1995 and 2022-11-14)
* 500 riels (2002-04-04 and 2014-01-14)
* 1,000 riels (2006-01-06 and 2017-10-25)
* 2,000 riels (2008-01-03, 2013-11-09 and 2022-11-14)
* 5,000 riels (2001-04-06 and 2017-10-25)
* 10,000 riels (2001-04-06 and 2015-05-07)
* 15,000 riels (2019)
* 20,000 riels (2008-05-12 and 2018)
* 30,000 riels (2021-10-18)
* 50,000 riels (2001-04-06 and 2014-05-06)
* 100,000 riels (1995 and 2013-05-14)
| Image | Image | Value | Dimensions | Main Colour | Description | Description | Date of | Date of | Date of | Date of |
| Obverse | Reverse | Value | Dimensions | Main Colour | Obverse | Reverse | printing | issue | withdrawal | lapse |
| | | 50 riels | 130 × 60 mm | Dark brown and tan | Banteay Srei | Dam | 2002 | 29 August 2002 | | current |
| | | 100 riels | 130 × 60 mm | Purple, brown and green | Independence Monument | School | 2001 | 9 August 2001 | | current |
| | | 100 riels | 138 × 64 mm | Orange and brown | Naga (mythical snake) head, Buddha, King Father Norodom Sihanouk as a young monk | Khmer statue, Wat Preah Keo (Silver pagoda), Buddha | 2014 | 14 January 2015 | | current |
| | | 200 riels | 138 × 64 mm | Gray, green and orange | Royal arms of Cambodia, Naga (mythical snake) head, King Norodom Sihamoni as a young man | Preah Thineang Chan Chhaya (Moonlight Pavilion) of the Royal Palace in Phnom Penh, Paul Ducuing’s statue of King Sisowath at the National Museum of Cambodia | 2022 | 14 November 2022 | | current |
| | | 500 riels | 138 × 64 mm | Red and purple | Angkor Wat | Kizuna bridge over the Mekong | 2002 2004 2014 | 4 April 2003 | | current |
| | | 500 riels | 138 × 64 mm | Red, pink and gray | Naga (mythical snake) head, arms, king Norodom Sihamoni | Neak Loeung Bridge, Kizuna bridge over the Mekong River, monument, frieze | 2014 | 14 January 2014 | | current |
| | | 1,000 riels | 138 × 64 mm | Brown and lilac | Southern gate at Bayon | Autonomous Port of Kampong Saom (Sihanoukville) | 2005 2007 2014 | 6 January 2006 | | current |
| | | 1,000 riels | 148 × 68 mm | Lilac and dark-blue | Naga (mythical snake) head, Royal Arms of Cambodia, King Norodom Sihanouk (1922–2012) | Royal Palace throne room, swan-shaped float carrying Sihanouk's body | 2012 | 30 January 2013 | | |
| | | 1,000 riels | 146 × 68 mm | Purple and blue | Naga (mythical snake) head, arms, King Norodom Sihanouk | Royal palace throne room, Kinnari (half-human, half-bird) | 2016 | 25 October 2017 | | current |
| | | 2,000 riels | 146 × 68 mm | Green, black and yellow | Prasat Preah Vihear | Angkor Wat and rice field Worker | 2007 2015 | 3 January 2008 | | current |
| | | 2,000 riels | 146 × 68 mm | Green | Naga (mythical snake) head, Royal Arms of Cambodia, King Norodom Sihanouk (1922–2012) | King Norodom Sihanouk alongside two soldiers crossing a river (December 1953); Independence Monument (Phnom Penh) | 2013 | 8 November 2013 | | |
| | | 2,000 riels | 146 × 68 mm | Green, orange, black, brown, and yellow | Royal arms of Cambodia, naga (mythical snake) head, King Norodom Sihamoni | Ancient stone artifact; Prasat Tao (King Lion Temple) at Sambo Prei Kuk Kampong Tom Province; chinthe (King Lion) | 2022 | 14 November 2022 | | current |
| | | 5,000 riels | 146 × 68 mm | Green and gray | King Norodom Sihanouk (1922–2012) | Bridge of Kampong Kdei (Siem Reap Province) | 2001 2002 2004 2007 | 6 April 2001 | | current |
| | | 5,000 riels | 146 × 68 mm | Violet and brown | Naga (mythical snake) head, vessel, King Norodom Sihanouk wearing beret | Naga (mythical snake) head, Kampong Kdei bridge (Siemreap Province), freezes, chariot | 2015 | 25 October 2017 | | current |
| | | 10,000 riels | 146 × 68 mm | Violet, brown and blue | King Norodom Sihanouk (1922–2012) | Sisowath Quay | 2001 2005 2006 | 6 April 2001 | | current |
| | | 10,000 riels | 155 × 72 mm | Blue | Naga (mythical snake); King Norodom Sihamoni | Neak Pean (entwined serpents) archeological ruins of Buddhist temple on circular island in Preah Khan Baray, Angkor; stone statue of horse, Balaha | 2015 | 15 May 2015 | | current |
| | | 15,000 riels | 170 x 75 mm | Purple | King Norodom Sihamoni, seven-headed naga | Coronation of Norodom Sihamoni, Win-Win Memorial, three-headed elephant carrying a garuda bearing a swan | 2019 | 7 October 2019 | | current |
| | | 20,000 riels | 155 × 72 mm | Violet and purple | King Norodom Sihamoni | Angkor Wat, Four faces of the Bodhisattva Avalokitesvara | 2008 | 5 December 2008 | | current |
| | | 20,000 riels | 155 x 72 mm | Light and dark pink and gray | Naga (mythical snake), king Norodom Sihamoni | Banteay Srei Temple in Siem Reap province | 2017 | 16 May 2018 | | current |
| | | 30,000 riels | 170 x 75 mm | Green, brown and purple | Naga (mythical snake), king Norodom Sihanouk | King Norodom Sihanouk and Prime Minister Samdech Techo Hun Sen, Royal Palace, Eiffel Tower and Independence Monument | 2021 | 18 October 2021 | | current |
| | | 50,000 riels | 150 × 70 mm | Violet, brown and blue | Norodom Sihanouk | Angkor Wat, three-headed elephant | 2001 | 6 April 2001 | | current |
| | | 50,000 riels | 155 × 72 mm | Brown | Naga (mythical snake), King Norodom Sihanouk | Bakong Temple and sculpture of elephant at Koh Ker temple | 2013 | 6 May 2014 | | current |
| | | 100,000 riels | 170 × 77 mm | Green | Royal Arms of Cambodia, King Father Norodom Sihanouk, Queen Mother Norodom Monineath, Naga (mythical snake) head | King Father Norodom Sihanouk, Queen Mother Norodom Monineath and King Norodom Sihamoni, stone sculpture | 2012 | 14 May 2013 | |
| These images are to scale at 0.7 pixel per millimetre. For table standards, see the banknote specification table. |||||||||||

### Coins

The first coins were 5 sen pieces, minted in 1979 and made of aluminum. No more coins were minted until 1994, when denominations of 50, 100, 200 and 500 riels were introduced. However, these are rarely found in circulation.
Coins of the Cambodian riel :
| Image | Image | Value | Diameter | Mass | Composition | Edge | Obverse | Reverse | Year of | Year of |
| Obverse | Reverse | Value | Diameter | Mass | Composition | Edge | Obverse | Reverse | first minting | withdrawal |
| | | 50 riels | 15.9 mm | 1.6 g | Steel | Plain/Smooth | Denomination, year of minting in Buddhist and Gregorian calendar | Independence Monument in Phnom Penh | 1994 | |
| | | 100 riels | 17.9 mm | 2 g | Steel | Plain/Smooth | Denomination, year of minting in Buddhist and Gregorian calendar | Angkor Wat | 1994 | |
| | | 200 riels | 20 mm | 2.4 g | Steel | Plain/Smooth | Denomination, year of minting in Buddhist and Gregorian calendar | 2 Ceremonial bowls (one above the other) Above this is symbol Om (in Khmer language) from which rays of light emitting | 1994 | |
| | | 500 riels | 25.8 mm | 6.5 g | Bi-Metallic; steel in center, brass in ring | Segmented (Plain and Reeded edges) | Denomination, year of minting in Buddhist and Gregorian calendar | Royal arms of Cambodia (Lesser version) | 1994 | |