Calculate goods and services tax (GST) or value-added tax (VAT) instantly with our free online calculator. Whether you're a business owner in India, Nepal, UK, Europe, or anywhere else, our tool helps you quickly add or remove tax from any amount. Perfect for invoicing, pricing, and tax compliance.
How to Use GST/VAT Calculator
Add Tax to Amount
To add GST/VAT to your base amount, select "Add Tax" and enter your tax rate. The calculator will show the total including tax.
Remove Tax from Total
To extract the base amount from a total that includes tax, select "Remove Tax". Useful for reverse charge calculations.
Common GST/VAT Rates by Country
| Country/Region | Tax Name | Standard Rate |
|---|---|---|
| India | GST | 18% |
| Nepal | VAT | 13% |
| United Kingdom | VAT | 20% |
| European Union | VAT | 21% (avg) |
| Australia | GST | 10% |
| Canada | GST/HST | 5-15% |
| New Zealand | GST | 15% |
Frequently Asked Questions
What is the formula to add GST?
Tax Amount = (Base Amount × Tax Rate) / 100
Total Amount = Base Amount + Tax Amount
How do I calculate VAT in reverse?
Base Amount = Total Amount × (100 / (100 + Tax Rate))
What is the highest VAT in the world?
Hungary has the highest standard VAT rate at 27%, followed by Croatia and Denmark at 25%.