VAT Calculator vat-calculator.net
This calculator does not yet use updating exchange rates. You need to set the currency conversion rate yourself in the 'Your own rate' field. The values 'CUR_FROM' and 'CUR_TO' are used as the currency names.
By selecting the 'Taxation country' option for either 'From currency' or 'To currency', you determine which currency the VAT is calculated in. This can affect how the figures are rounded.