VAT Calculator

2026

VAT Calculator

Add or remove VAT, check the tax breakdown, and calculate totals using a rate you choose.

Project overview

About the Project

Add VAT to a price or remove VAT from a total using a rate you choose. See the original price, VAT amount and final total in one clear breakdown.

The calculator supports custom rates from 0% to 100%, four currency labels, copying a breakdown and printing. It uses integer arithmetic for currency amounts and rounds the displayed amounts to two decimal places. Currency labels change the display; they do not perform currency conversion.

This Codex-assisted Innovation Lab pilot was reviewed and tested by Godwin Lawson. The calculator runs in your browser and does not send or save the figures you enter. The initial 7.5% rate is an example; choose the rate that applies to your transaction.

Context

The Challenge

People pricing products or checking invoices need to separate the price before VAT, VAT amount and final total. This calculator makes that breakdown clear and helps avoid subtracting a VAT percentage directly from a total that already includes VAT.