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Home / Calculators / Sales Tax Calculator

Free Sales Tax Calculator

Calculate sales tax amount and total price instantly. Works for before-tax or after-tax calculations.

Mode:
in dollars ($)
percentage (%)
Please enter a valid amount and tax rate.
$0.00
Total Price (after tax)
Tax: $0.00
Tax Breakdown
$0.00
Price Before Tax
$0.00
Sales Tax Amount
$0.00
Total Price
0%
Effective Tax Rate
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How to Use the Sales Tax Calculator

1

Choose Calculation Mode

Select "Before Tax" to add tax to a price, or "After Tax" to extract tax from a total.

2

Enter Amount & Rate

Enter the price or total amount and the applicable sales tax rate in your area.

3

Get Instant Results

Click "Calculate Tax" to see the tax amount, total price, and a full breakdown.

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About Sales Tax

Sales tax is a consumption tax imposed by governments on the sale of goods and services. It is typically calculated as a percentage of the purchase price and collected by the seller at the point of sale. In the United States, sales tax is administered at the state and local levels, which means rates can vary significantly depending on where you are.

Common sales tax rates around the world:

0–10%
United States (varies by state)
20%
United Kingdom (VAT)
19%
Germany (VAT)
10%
Australia (GST)
5%
Japan (Consumption Tax)
13%
Canada (HST/GST varies)

Frequently Asked Questions

Sales tax is calculated using the formula: Tax Amount = Price Before Tax × (Tax Rate / 100). The total price is then Price Before Tax + Tax Amount. For example, if an item costs $100 and the sales tax rate is 8%, the tax is $8 and the total is $108. To find the tax included in a total, use: Price Before Tax = Total / (1 + Tax Rate / 100).

Before-tax calculation is used when you know the price of an item before tax and want to find out how much tax will be added and what the final total will be. After-tax calculation is used when you know the total amount you paid (including tax) and want to determine the original price before tax and how much tax you actually paid. Both modes are supported by this calculator.

Yes, it is completely free. There are no hidden charges, subscription plans, or usage limits. You can use it as many times as you like, for personal, business, or educational purposes. No registration or sign-up is required.

No, absolutely not. Your amounts, tax rates, and results are processed entirely on your device using client-side JavaScript. No data is ever sent to any server, stored in cookies, or tracked. Your privacy and financial information are fully protected.

Yes. Sales tax, VAT (Value Added Tax), and GST (Goods and Services Tax) all follow the same percentage-based calculation method. Simply enter the applicable rate for your country or region. The calculator works for any type of consumption tax, whether it's US sales tax, UK VAT, Australian GST, or any other similar tax.

The applicable sales tax rate depends on your location. In the United States, rates vary by state, county, and city — ranging from 0% in states like Delaware and Oregon to over 10% in some cities. In many European countries, VAT rates range from 17% to 27%. Australia has a 10% GST. Check your local tax authority's website for the exact rate that applies to your purchase.

To remove tax from a total amount (also called "backwards tax calculation"), use this formula: Price Before Tax = Total Price / (1 + Tax Rate / 100). For example, if you paid $108 total and the tax rate is 8%, the price before tax is $108 / 1.08 = $100. The tax amount is $108 - $100 = $8. This calculator's "After Tax" mode performs this calculation automatically.

The calculator is mathematically accurate to the precision you enter. It uses standard rounding to two decimal places for currency amounts, which is the industry standard for financial calculations. However, always verify results with your local tax authority, as some jurisdictions have unique rounding rules, tiered rates, or exemptions for certain products.

Not necessarily. Many jurisdictions exempt certain items from sales tax, such as groceries, prescription medications, medical devices, educational materials, and essential clothing. Some services may also be exempt. Digital products and services have varying tax treatment worldwide. Check your local tax regulations to understand what is taxable in your area.
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