Pounds, shillings and pence calculator

SterlingCalc LSD 240

Sterling calculator


Sadly, electronic calculators arrived too late for Britain's pounds, shillings and pence system. The first calculators went on sale in late 1970. Decimalisation was already on the way in the UK, so no-one made a sterling pocket calculator.

I wanted to see what one would have looked like if the technology had been available a little sooner, or if we had kept pounds shillings and pence until 1975.



To add £5 8s 11d and 7s 6d:

Enter: '5' - '£' - '8' - 's' - '1' -' 1' - 'd'

Enter: '+':

Enter: '7' - 's' - '6' - 'd':

Enter: '='


To subtract 7s 6d from £5 8s 11d:

Enter: '5' - '£' - '8' - 's' - '1' -' 1' - 'd'

Enter: '-':

Enter: '7' - 's' - '6' - 'd':

Enter: '='


To multiply £5 8s 11d by 9:

Enter: '5' - '£' - '8' - 's' - '1' -' 1' - 'd'

Enter: 'x':

Enter: '9':

Enter: '='


To divide £5 8s 11d by 3:

Enter: '5' - '£' - '8' - 's' - '1' -' 1' - 'd'

Enter: '÷':

Enter: '3':

Enter: '='

Division rounds to the nearest 1d.

Add your comments

"Brilliant! Thanks so much for doing that. I'd certainly buy a LSD calculator if one was available. It would be even better if it could include farthings as well.

Thanks again, I appreciate your work; as a non-techie, I am in awe of your coding skills." Philip 27/03/2020

"I'm glad you liked it. You can make it more realistic if you look at the page on a smart phone. It can display the calculator on its own. It looks and feels more like the real thing.

I might work on the farthings at a later date. All the best." Steven 28/03/2020

"I can't divide £1 by 3d because it comes out £NaN NaNs NaNd" Juan José Berdaguer Hijano 07/08/2020

"It's an error. I'm not sure what it means to divide a pound by three pence. You can divide a pound by 3." Steven 07/08/2020

"Very useful as i give my niblings their allowance in predecimal coins. i use this calculator nearly daily. very happy with it.

if you could add farthings that would be super!!!" Isabelle Kelly 14/10/2020

"Thank you so much!!" Beth 10/11/2020

"Great. Just what I was looking for!" A Marshall 26/01/2021

"I want to be able to multiply my hourly rate of 5s 11d and three farthings by 60 hours per week to get my gross salary your calculator does not allow for halfpennies or farthings" Gordon Rennie 29/03/2021

"Hi Gordon,
Try rounding up to 6s per hour. Then you can subtract 15 pence. As 60 farthings is 15d. best regards" Steven 29/03/2021

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Retrowow - vintage, retro and social history

20th Century History ★ Antiques & Collectibles

Retrowow - vintage, retro and social history

★ 20th Century History ★ Antiques & Collectibles ★