Decimal Day weights and measures.) Around the time of Decimalisation Day, "Decimal Adders" and other converters were available to help people convert between the old and new coins. The following is a table showing conversions between the decimal and pre-decimal systems. All pre-decimal coins (except for certain non-circulating coins such as crowns, sovereigns, and double florins which were explicitly excluded from demonetisation) are now no longer legal tender. Public outcry at the proposed demise of the old sixpence (6d), worth exactly p and originally slated for early withdrawal, postponed its withdrawal until June 1980. Shillings and florins, together with their same-sized 5p
Penny (United States coin) mm) in thickness. Its weight has varied, depending upon the composition of metals used in its production (see further below). The U.S. Mint's official name for the coin is "cent" and the U.S. Treasury's official name is "one cent piece". The colloquial term "penny" derives from the British coin of the same name, the pre-decimal version of which had a similar place in the British system. In American English, "pennies" is the plural form. (The plural form "pence"—standard in British English—is not used in reference to American coins.) Although the coin's abolition has been proposed because it is now worth