Sales Tax Calculator
Add sales tax, VAT or GST to a price, or remove it from a tax-inclusive price, in one click.
About the Sales Tax Calculator
Whether it is called sales tax, VAT or GST, this calculator adds tax to a net price or works backwards from a price that already includes tax. It is useful for shoppers, freelancers writing invoices and small business owners.
How to Use the Sales Tax Calculator
- Choose whether to add or remove tax.
- Enter the price and the tax rate.
- Press Calculate to see the tax amount and the net and gross prices.
Formula and How It Works
Adding tax: tax = price × rate ÷ 100, and total = price + tax. Removing tax: net price = price ÷ (1 + rate ÷ 100), and tax = price − net price.
Frequently Asked Questions
Why can’t I just subtract the tax percentage?
Because the tax was calculated on the lower net price. With 10% tax, 110 includes 10 of tax, not 11.
Does this work for VAT and GST?
Yes. Enter your country’s VAT or GST rate and the maths is the same.
Results are estimates for planning purposes only and are not financial advice. Actual figures from your bank or lender may differ.