Decimalisation

decimal currencydecimaliseddecimalizationdecimaldecimal coinagedecimal currenciesdecimal systemdecimalizedcurrency decimalisationdecimal accounting
Decimalisation (American English: Decimalization) is the conversion of a system of currency or of weights and measures to units related by powers of 10.wikipedia
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Metrication in the United States

metricationMetric system in the United Statestransition to the metric system
Units of physical measurement, such as length and mass, were decimalised with the introduction of the metric system, which has been adopted by almost all countries with the prominent exception of the United States and, to a lesser extent, the United Kingdom.
The United States was one of the first nations to adopt a decimal currency, under the Coinage Act of 1792.

New Zealand dollar

NZ$NZD$
New Zealand decimalised on 10 July 1967, with the New Zealand dollars replacing the New Zealand pound.
Switching to decimal currency had been proposed in New Zealand since the 1930s, although only in the 1950s did any plans come to fruition.

Russian ruble

rublesrubleRUB
Russia converted to a decimal currency under Tsar Peter the Great in 1704, with the ruble being equal to 100 kopeks, thus making the Russian ruble the world's first decimal currency.
The ruble was the first currency in Europe to be decimalised, in 1704, when the ruble became equal to 100 kopeks.

Fijian dollar

F$FJ$FJD
Fiji followed the pattern of South Africa, Australia, and New Zealand in that when it adopted the decimal system, it decided to use the half pound unit as opposed to the pound unit of account.

Australian dollar

A$$AUD
Australia decimalised on 14 February 1966, with the Australian dollars replacing the Australian pound.
In commemoration of the 40th anniversary of decimal currency, the 2006 mint proof and uncirculated sets included one- and two-cent coins.

Decimal Day

decimalisationdecimalizationdecimal currency
(See £sd and Decimal Day.)
Decimal Day in the United Kingdom and in Ireland was on 15 February 1971, the day on which each country decimalised its respective £sd currency of pounds, shillings, and pence.

Dutch guilder

guildersguilderƒ
Dutch guilder decimalised in 1817 (became equal to 100 centen instead of 20 stuivers = 160 duits = 320 penningen), with the last pre-decimal coins withdrawn from circulation in 1848.
In 1817 it became decimalised, with one guilder equal to 100 cents.

Pound sterling

£GBPpounds
The United Kingdom decimalised the pound sterling and Ireland decimalised the Irish pound in 1971.
Since decimalisation on Decimal Day in 1971, the pound has been divided into 100 pence (denoted on coinage, until 1981, as "new pence").

Austro-Hungarian gulden

guldenflorinflorins
The Austro-Hungarian Empire decimalised the Austro-Hungarian gulden in 1857, concurrent with its transition from the Conventionsthaler to the Vereinsthaler standard.
The currency was decimalized in 1857, using the same names for the unit and subunit.

£sd

£shillings and pence per poundd
(See £sd and Decimal Day.)
Still others, notably Ireland, decimalised only when the UK did.

Australian pound

£A₤
Australia decimalised on 14 February 1966, with the Australian dollars replacing the Australian pound.
On 14 February 1966, a decimal currency, the dollar of one hundred cents, was introduced.

Metrication

metrificationmetricatedadopted
For weights and measures this is also called metrication, replacing traditional units that are related in other ways, such as those formed by successive doubling or halving, or by more arbitrary conversion factors.
Metrication did occur in some areas during this time period, including the re-surveying of Ordnance Survey maps in 1970, decimalisation of the currency in 1971, and teaching the metric system in schools.

Peruvian sol (1863–1985)

solsolesPeruvian sol
The sol was introduced in 1863 when Peru completed its decimalization, replacing the real at a rate of 1 sol = 10 reales.

Cypriot pound

CYPCY£pound
Cyprus decimalised the Cypriot pound in 1955, which comprised 1000 mils, later replaced by 100 cents.
In 1955, the British colonial authorities decimalised the Cypriot pound, using the system proposed in 1855 by Sir William Brown, a member of the United Kingdom parliament, that the pound sterling in the United Kingdom should be divided into 1000 parts, each called a mil (rather than 960 farthings).

Maltese lira

LmMALMaltese pound
Malta decimalised the lira in 1972.
Although using British coins, Malta did not decimalize with the UK in 1971.

Zambian kwacha

kwachaZMWngwee
The government voted in favor of decimalisation, and changing the main currency unit to Kwacha, with one kwacha being equal to 100 ngwee.

Irish pound

IR££IEP
The United Kingdom decimalised the pound sterling and Ireland decimalised the Irish pound in 1971.
The Report of the Metric System and Decimal Coinage Committee (1959) was amongst the first formal reports on decimalisation of the currency, discussion continued into the 1960s on the topic.

Iranian rial

rialsrialIRR
Iran decimalised its currency in 1932, with the rial, subdivided into 100 new dinars, replacing the qiran at par.
In 1825, the rial ceased to be issued, with the qiran subdivided into 20 shahi or 1,000 dinar and was worth one tenth of a toman, being issued as part of a decimal system.

Metric system

metricmetric unitsmetric unit
Units of physical measurement, such as length and mass, were decimalised with the introduction of the metric system, which has been adopted by almost all countries with the prominent exception of the United States and, to a lesser extent, the United Kingdom.
The metric system is an internationally recognised decimalised system of measurement.

Shilling

sshillingss.
It replaced the South African pound as legal tender, at the rate of 2 rand = 1 pound or 10 shillings to the rand.
In 1966, Australia's currency was decimalised and the shilling was replaced by a ten cent coin (Australian), where 10 shillings made up one Australian dollar.

Tongan paʻanga

pa'angaT$Tongan pa'anga
When Tonga introduced decimal currency, it decided not to call the main unit the dollar because the native word, tola, translated into a pig's snout, the soft end of a coconut, or, in vulgar language, a mouth.

Non-decimal currency

Non-decimal currenciesnon-decimalpre-decimal
Historically, most currencies were non-decimal, though today virtually all are now decimal.

Rupee

RsrupeesRs.
India changed from the rupee, anna, pie system to decimal currency on 1 April 1957.
Decimalisation occurred in Ceylon (Sri Lanka) in 1969, in India in 1957, and in Pakistan in 1961.

Decimal time

10-hour clockdecimal clocksdecimal multiple
While the common units of time, minute, hour, day, month and year, are not decimalised, there have been proposals for decimalisation of the time of day and decimal calendar systems.
Decimal time was part of a larger attempt at decimalisation in revolutionary France (which also included decimalisation of currency and metrication) and was introduced as part of the French Republican Calendar, which, in addition to decimally dividing the day, divided the month into three décades of 10 days each; this calendar was abolished at the end of 1805.

Indian anna

annaannasa very small fee
India changed from the rupee, anna, pie system to decimal currency on 1 April 1957.
The anna was demonetised as a currency unit when India decimalised its currency in 1957, followed by Pakistan in 1961.