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Add or remove VAT from any price instantly.
Our free VAT calculator lets you quickly add VAT to a price or extract VAT from a VAT-inclusive amount. Works with any VAT rate. The calculator is designed to give a fast answer, but the quality of the answer still depends on accurate inputs and a clear idea of what decision you are trying to support.
- Enter Amount, VAT Rate, and Calculation Mode using the same units you plan to compare or report.
- Read the main vat amount first, then use the supporting outputs to understand the trade-offs behind that result.
- Compare your numbers with the worked examples below if you want a quick reasonableness check.
The output separates the net amount, VAT amount, and gross amount so you can see the tax component clearly instead of treating the final price as a black box. On this page, the primary output is vat amount.
Scenario 1: Add 20% VAT to £100. Inputs used: amount: 100, rate: 20, mode: add. Example result: £20 VAT (£120 total). Adding 20% VAT to £100 gives a VAT amount of £20 and a total price of £120. Scenario 2: Remove 20% VAT from £120. Inputs used: amount: 120, rate: 20, mode: remove. Example result: £20 VAT (£100 net). Removing 20% VAT from £120 gives a net price of £100 with £20 VAT.
Core formula: add VAT: gross = net * (1 + rate); remove VAT: net = gross / (1 + rate). The calculator works in both directions: it can apply tax to a net amount or extract the tax portion from a tax-inclusive price.
- VAT amount is always the difference between gross and net.
- The same rate can produce different tax amounts depending on whether you start from net or gross input.
Use this calculator when pricing invoices, checking receipts, or moving between tax-exclusive and tax-inclusive amounts. Related paths for follow-up analysis include percentage calculator, roi calculator, and profit margin calculator.
Most bad outputs come from a few repeated input errors or interpretation mistakes. Use this short checklist before relying on the result.
- Applying VAT twice when the source amount already includes tax.
- Using the wrong regional rate for the transaction.
- Confusing sales tax workflows with VAT-inclusive pricing logic.
