I've made a spreadsheet template for counting up your cash and coins. By default, it will be in GBP, but you can change it to your local currency.
Download it here:
In most cases, the XLSX download should be the one you should use.
Users using the XLSX file and Microsoft Excel: You might want to change the font and text colour, as it will appear black, which is hard to read with the default colour scheme. I can't fix this as I don't have access to the latest Microsoft Office software at home. Sorry!