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VAT & Sales Tax Calculator

Add tax to a net price or extract it from a gross total, right in your browser.

How VAT & Tax Calculator works

The VAT and sales tax calculator works in both directions: give it a net price and a tax rate to get the gross total, or paste a tax-inclusive gross amount to recover the pre-tax net and the exact tax charged. Common rates such as 5, 10, 15, 20, 21 and 25 percent are one-tap presets, and any custom decimal rate is accepted for regional variations like 5.5 or 8.25 percent.

The same formula covers VAT, GST, HST and US state sales tax - only the rate changes. The remove-tax direction back-calculates with the standard formula net = gross / (1 + rate/100), so you can see at a glance how much tax a quoted price already contains. Every figure stays inside your browser; no numbers are sent to any server, making it useful for confidential business quotes.

Written by Bastien Sulyan

How to use VAT & Tax Calculator, step by step

  1. Select Add tax or Remove tax depending on which direction you need.
  2. Enter the price amount in the first field.
  3. Choose a rate preset or type your own rate in the custom field.
  4. Read the breakdown: net amount, tax amount and gross total update instantly.

Common use cases

  • A freelance designer adds 20% VAT to a net project quote to give a client the correct invoice total.
  • A traveller back-calculates whether a receipt amount already includes local GST before claiming a refund.
  • An e-commerce operator checks the split between net revenue and VAT across several EU rate zones.
  • An accountant stress-tests a margin by applying the 5.5% reduced French VAT rate to a food product price.

Frequently asked questions

Does the tax calculator send my figures to a server?

No. All arithmetic runs directly in your browser tab using plain JavaScript. The price and rate you enter are never transmitted anywhere - you can cut your internet connection after the page loads and every calculation still works.

What is the difference between Add tax and Remove tax?

Add tax starts with a net (before-tax) price and applies the rate on top: gross = net * (1 + rate/100). Remove tax starts with a gross (tax-inclusive) price and strips the embedded tax out: net = gross / (1 + rate/100). The exact tax amount is shown in both cases.

Which countries and tax types are covered?

Any jurisdiction that uses a percentage rate on top of a net price is covered: EU VAT, UK VAT, Australian GST, Canadian HST/GST, US state sales tax and similar systems. Enter your local rate in the custom field if it is not in the presets.

Can I enter a rate with decimal places like 5.5 or 7.7 percent?

Yes. The custom rate field accepts any non-negative decimal number. This covers reduced VAT rates such as 5.5% on food in France, 7.7% in Switzerland or 8.25% in some US counties.

Is this tool suitable for official tax returns or invoice compliance?

This tool is for estimation and quick checks only, not for certified accounting. Tax legislation varies by jurisdiction and product type. Confirm figures with a qualified tax professional or your accounting software before filing a return.

Does a zero-percent rate work?

Yes. Entering 0 as the rate will show the gross equal to the net and a tax of zero, which is correct for zero-rated goods under some VAT regimes. The formula handles the zero case cleanly without dividing by zero.