How this calculator works
Pence sterling and pounds sterling are the same currency in different units, like cents and dollars. One pound is 100 pence, always and without an exchange rate. The ISO code GBP is used for pounds, and GBX is used for pence sterling, particularly on the London Stock Exchange where most share prices are quoted in pence. Confusing the two is a common and expensive mistake: a share quoted at 1,250 GBX costs £12.50, not £1,250. To go from pence to pounds, divide by 100; to go from pounds to pence, multiply by 100. Unlike a currency conversion, there is no spread, no fee and no rate to look up, because the two units measure the same money. The distinction matters when reading market data, calculating a portfolio value, or entering a share price into a spreadsheet that expects pounds. If a price feed shows a number that looks about a hundred times too small or too large, check whether it is quoted in GBX. The thousands figure in the results is useful for financial statements, which often report amounts in thousands of pounds.
Formula
Pounds = pence / 100. Pence = pounds x 100. Pounds in thousands = pounds / 1,000.
Worked example
A share quoted at 1,250 GBX is 1,250 / 100 = £12.50. A holding of 400 shares is therefore worth 400 x £12.50 = £5,000. Converting the other way, £275 is 27,500 GBX. In thousands, £275,000 is shown as 275.
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Frequently asked questions
What does GBX mean?
GBX is the market convention for pence sterling, used so that prices and quotes can be expressed in whole pence instead of small decimals of a pound. It is the same currency as GBP, just a different unit.
Is this an exchange rate?
No. Pence and pounds are fixed at 100 to 1. There is no market rate and no conversion fee. An exchange rate applies between different currencies, such as GBP and CAD.
Why do UK share prices appear in pence?
Because whole pence give a more precise quote without decimals. The London Stock Exchange quotes most listed shares in GBX, while funds and some other instruments may quote in GBP, so always check the unit on the price feed.
How do I spot a pence error in a spreadsheet?
If your portfolio value is exactly 100 times too large or too small, a GBX price has probably been mixed with a GBP amount. Multiply or divide by 100 to correct it, and label the column with its unit.