VAT Calculator
Add or remove VAT from any amount at 20%, 5%, 0% or a custom rate.
UK VAT Calculators
Free calculators for everyday VAT sums. Each one uses the current UK rates, shows its working and runs in your browser — nothing you type is stored.
Reverse VAT Calculator
Start from a VAT-inclusive price and find the net amount and VAT inside it.
VAT Percentage Calculator
Work out the VAT on a net amount at any percentage.
VAT Invoice Calculator
Add invoice lines, mix VAT rates and get the VAT and invoice total.
VAT Margin Calculator
See your profit margin with VAT handled correctly on cost and price.
VAT Registration Calculator
Check your rolling 12-month turnover against the VAT threshold.
Which calculator do I need?
| If… | Use |
|---|---|
| I have a price before VAT and want the total | VAT Calculator |
| I have a total that includes VAT and want the VAT part | Reverse VAT Calculator |
| I want to know which VAT rate was charged | VAT Percentage Calculator |
| I have several items at different rates | VAT Invoice Calculator |
| I want my profit after VAT | VAT Margin Calculator |
| I want to know if I need to register for VAT | VAT Registration Calculator |
All calculators use the rates on our UK VAT rates page (last reviewed 26 September 2026). Results are for guidance only and are not tax advice.
Want to understand the numbers?
Our guides explain how VAT is worked out, with examples and links to HMRC.
Run a website? Add our VAT calculator to it
Free for accountants, bloggers and small businesses. Copy one piece of code; we keep the rates up to date.