Historical currency converters giving slightly different results?

icicat

For my capital gains tax I need to create a shares summary sheet. As my shares were held in the US all the figures are in dollars. I am using a historical calculator to convert them to GBP based on the dates they were purchased. I need to acquire a figure for cost so I can put that in the return.

However, I noticed different historical currency converters show slightly different conversions. So one says £5.44 and the other says £5.70 then another says £6.10.

I need an accurate conversion as the figure for cost will be deducted from the full amount.  Any idea why they differ and any idea how to get the most accurate result?

molerat

There are HMRC and BoE tables available on line.

eskbanker

icicat said:

However, I noticed different historical currency converters show slightly different conversions. So one says £5.44 and the other says £5.70 then another says £6.10.

If you confirm exactly which sites gave such radically different answers (and the relevant input amount and date), then someone may be able to help identify why there's a discrepancy - minor anomalies might be expected, given that sites may choose different times of day, for example, but variances of over 10% can't be explained by that....

icicat

molerat said:

There are HMRC and BoE tables available on line.

Yeah I looked at those and to be honest I have no idea what to do with them. Even the Lady at HMRC couldn't tell me how to use them and said to just use the site I was using and supply a link to it.

I used this website: https://fxtop.com/en/historical-currency-converter.php