Trouble is, these retro-calculators never work. The biggest change in the 'value' of things is the cost of labour - something that has soared over the past century.
£40 an hour is not unusual for a skilled craftsperson these days, wheras in the days of indentures and sweated labour, hourly work could be reckoned in pennies.
Which is one reason why our lives are now full of mass-produced, machine-made gewgaws, and why decorative plastering, woodwork and other craft skills are only within the reach of the super-rich or those who can do the job themselves.
And, at the risk of total thread-creep, anyone who hasn't read The Ragged Trousered Philanthropists by Robert Tressell has missed one of the great inspirational books on the real value of money and labour. I just wish some of the present UK government had read it!