Pre-decimal currency converter

Convert old pounds, shillings and pence (£sd) to modern decimal currency

In the UK today, we use a decimal currency with 100 pennies (p) in the pound (£). Before 1971, our currency was made up of pounds (£), shillings (s) and pence (d). There were 240 old pennies to the pound and a shilling was 12 old pennies. 

This tool helps you understand historical prices and wages by converting old money into decimal values. For inflation-adjusted modern values, use our inflation calculator

Enter pre-decimal amount

Enter number of pounds
Enter number of shillings (0-19) Shillings must be between 0 and 19
Enter number of pence (0-11, can include farthings as 0.25)

Conversion result

Pre-decimal amount
Decimal pounds
In new pence

Quick examples (select to use)

Understanding pre-decimal currency

Before 15 February 1971 (Decimal Day), the UK used the £sd system which had been in place for more than 1,000 years:

  • £1 = 20 shillings
  • 1 shilling = 12 pence
  • £1 = 240 old pence
  • 1 old penny = 4 farthings

Common coins: farthing (¼d), halfpenny (½d), penny (1d), threepence (3d), sixpence (6d), shilling (1s or 12d), florin (2s), half-crown (2s 6d), crown (5s)

Common notation: amounts were written as £5 10s 6d or £5/10/6 (five pounds, ten shillings and sixpence)

To find the modern purchasing power of historical amounts, first convert them here, then use our inflation calculator.

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This page was last updated 02 March 2026