1 farthing (the lowest value coin) = 1/4 penny 

A ha'penny (Halfpenny  a copper coin) = 1/2 penny (pronounced "heipnee") 

1 penny (a copper coin) = one of the basic units (1d) 

Tuppence (two cents) = 2 pence (2d) 

Threepence or Thruppenny Bit = 3 pence (pronounced "thruppence") 

Sixpence (a silver coin also called a "tanner") = 6 pence 

1 shilling = 12 pence (1s) 

1 florin = 2 shillings = 1/10 of a pound 

A halfcrown = 2 shillings and 6 pence 

1 crown = 5 shillings = 1/4 pound 

1 pound = 20 shillings = 240 pence (£1) 

1 sovereign = a gold coin with a face value of £1 (about .24 ounces of 22 carat gold) 

A guinea = a gold coin, originally made of gold from the Guinea coast of Africa, worth 21s (or £1 and 1s).
A guinea was considered a more gentlemanly amount than £1, so a gentleman paid his tailor in shillings, but his barrister in guineas.

