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Sales Tax & VAT Calculator

DataMath

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INPUT

Auto Process

OUTPUT

Client Side


Pre-Tax Price	-
Tax Amount	-
Total (incl. Tax)	-

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Guide

Sales Tax & VAT Calculator

Instantly calculate sales tax and VAT on any price. Enter an amount and tax rate to see the pre-tax price, tax amount, and total. The calculator supports both adding tax to a price and removing tax from a tax-inclusive total (reverse VAT), making it useful for invoicing, receipt verification, and price comparisons across countries.

How to Use

Select your calculation mode: choose “Add Tax to Price” if you have a pre-tax amount, or “Remove Tax from Price” if you have a tax-inclusive total. Enter the price and set your tax rate manually or pick a common country preset from the dropdown. Results update instantly in the table below, showing the pre-tax price, tax amount, and total.

Features

Add Tax Mode – Calculate total price by adding tax to a pre-tax amount
Reverse VAT Mode – Extract the pre-tax price and tax amount from a tax-inclusive total
Country Rate Presets – Quickly apply common VAT and GST rates for UK, EU, Australia, Canada, India, Japan, and more
Instant Results – Calculations update in real time as you type

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 FAQ

What is the difference between sales tax and VAT?

Sales tax is charged once at the point of sale to the end consumer, while VAT (Value Added Tax) is collected at every stage of the supply chain. Both are consumption taxes, but VAT allows businesses to reclaim tax paid on inputs, whereas sales tax applies only at the final transaction.
How do you calculate the pre-tax price from a tax-inclusive total?

Divide the total by (1 + tax rate as a decimal). For example, if the total is $120 and the tax rate is 20%, the pre-tax price is $120 / 1.20 = $100. The tax amount is the difference: $120 - $100 = $20.
Why do VAT rates vary between countries?

Each country sets its own VAT or GST rate based on fiscal policy, government spending needs, and economic strategy. Rates range from as low as 5% in Canada (federal GST) to 25% or more in Scandinavian countries, reflecting different approaches to taxation and public services funding.