Our UK VAT Calculator helps you add or remove Value Added Tax from any amount at the standard 20% rate, the reduced 5% rate, or the 0% zero rate. Enter a figure and instantly see the net amount, the VAT element and the gross total — useful whether you are quoting a client, raising an invoice, reconciling a receipt or preparing a VAT return.

It is built for UK business owners, freelancers, contractors, accountants, bookkeepers and finance teams who need a quick, reliable VAT check without opening a spreadsheet. The calculator works in two directions: "Add VAT" applies the chosen rate to a net price, while "Remove VAT" extracts the VAT from a VAT-inclusive total.

The maths follows HMRC's standard method. To add 20% VAT, the net amount is multiplied by 1.20. To remove 20% VAT, the gross amount is divided by 1.20, and the difference is the VAT due. The same logic applies to the 5% reduced rate using a 1.05 multiplier. All figures are estimates for guidance only and should be cross-checked against current HMRC rules and your accounting records.