I occasionally read stuff that references old money. While I am very grateful to Project Britain for their explanation, I find it hard to hold onto the information because it jumps all around. While stuck in quarantine, I made a list based on the Project Britain page so that it would stick better in my head.
The list is in order of how many pennies each unit is worth
e.g. a farthing is a quarter of a penny
'Slang' terms are in quotes
e.g. coppers is slang for pennies
(Other useful non-penny unit) breakdowns are in parentheses
e.g. a crown is worth 5 shillings or a quarter of a pound
[Abbreviation] terms are in brackets
e.g. d stands for denarius
The UNITS in all caps are the ones used in writing prices and sums
e.g. 1l.2s.5d.
The list uses a fixed-width font so that the pennies align
Viola
farthing 0.25d
halfpenny 0.5d
PENNY d. 1d 'copper' [denarius]
half groat 2d
threepence 3d (0.25s) 'joey'
groat 4d
sixpence 6d (0.5s) 'tanner'
SHILLING s. 12d 'bob' [solidus]
florin 24d '2 bob bit'
1/2 crown 30d (2.5s)
crown 60d (5s=0.25l) 'dollar'
1/2 sovereign 120d (10s=0.5l)
1/2 guinea 126d (10.5s)
POUND l. 240d (20s) ** [libra]
guinea g. 252d (21s)
** £coin='sovereign' £note='quid'
Florin: Leeds Museums & Galleries
Quid: Wikipedia