VAT Calculator 20% VAT Calculator If you are running an online shop, you will often have to enter your prices excluding VAT, but you will also want a 'clean' price for your customers. Adding VAT to a price is easy but calculating VAT 'backwards' can sometimes be a little more tricky - as you can't simply take 20% off the VAT included price. To help you out Scoosh has developed this handy little VAT Calculator.Simply enter the amount you want to work with, select whether that amount already includes VAT or not. 20% Vat Calculator Input Amount » Inclusive of VAT? Calculate » VAT Amount Amount SummaryArticle NameVAT Calculator 'forwards' and 'backwards'AuthorScooshDescriptionTool to both add or remove 20% VAT from a number.