Don't bother with using a converter just get used to using metric length as everything works that way now, in the horse world, even horse height is in metric rather than hands & inches..........I, like many others, had to get used to decimalisation back in 1970 when we went from £.s.d to £&p & that was really difficult!
12pennies in a shilling (5p)
20 shillings in a pound
240 pennies in a pound
The coins being half penny, penny, threepenny piece, sixpence, shilling, two shilling (or florin), two & six pence, 10 shilling note, pound note etc.
Eventually you get used to the change.