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 20 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) Pence must be between 0 and 11.75

Conversion result

Pre-decimal amount
-
Decimal pounds
-
-
In new pence
-

Quick examples (click to use)

6d (sixpence)
= £0.025
1s (one shilling)
= £0.05
2s 6d (half crown)
= £0.125
5s (crown)
= £0.25
10s 6d (ten and six)
= £0.525
£1 1s (guinea)
= £1.05

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.

This page was last updated 04 September 2025