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Home / Calculators / Sales Tax Calculator

Free Sales Tax Calculator

Calculate sales tax amount and total price instantly. Supports before-tax and after-tax calculations.

dollars ($)
percent (%)
Please enter valid positive numbers for both fields.
$0.00
Total Price (after tax)
Tax: $0.00
Breakdown
$0.00
Price Before Tax
$0.00
Tax Amount
$0.00
Total Price
0.00%
Effective Rate

How to Use the Sales Tax Calculator

1

Choose Mode

Select "Before Tax" to add tax to a price, or "After Tax" to find the original price from a tax-inclusive total.

2

Enter Values

Enter the price amount and the applicable sales tax rate as a percentage.

3

View Results

Click "Calculate" to see the tax amount, total price, price before tax, and effective rate.

About Sales Tax

Sales tax is a percentage-based tax applied to the sale of goods and services. It is calculated by multiplying the pre-tax price by the applicable tax rate. The total amount paid is the sum of the original price and the tax. For currency conversions try our Currency Converter, or evaluate business returns with ROI Calculator.

In the United States, sales tax rates vary by state, county, and city — ranging from 0% in some states to over 10% in others. Many countries use a national VAT (Value Added Tax) or GST (Goods and Services Tax) instead, which follows the same percentage-based calculation.

To find the price before tax from a tax-inclusive total, divide the total by (1 + tax rate). For example, if the total is $108 and the tax rate is 8%, the price before tax is $108 ÷ 1.08 = $100. The tax amount is $108 - $100 = $8.

  • Before Tax: Calculate tax on a known pre-tax price to find the total amount due.
  • After Tax: Reverse-calculate from a tax-inclusive total to find the original price and tax amount.
  • VAT / GST: This calculator works for any consumption tax, including VAT and GST.

For official sales tax rates, visit SalesTaxHandbook or learn more at Investopedia's Sales Tax Guide.

Frequently Asked Questions

Enter the price or total amount and the sales tax rate. Choose whether you want to calculate tax on a pre-tax price or find the tax included in a total. Click Calculate to see the sales tax amount, total price, and a detailed breakdown.

Before-tax calculation: You enter the price before tax, and the calculator adds the sales tax to give you the total. After-tax calculation: You enter the total amount including tax, and the calculator works backward to find the original price and the tax amount.

The sales tax rate depends on your location. In the United States, rates vary by state, county, and city — ranging from 0% in some states to over 10% in others. Many countries have a national VAT or GST rate instead. Check your local tax authority for the correct rate.

Yes, it is completely free. There are no hidden charges, subscriptions, or usage limits. You can use it as many times as needed for personal, business, or educational purposes.

No, absolutely not. All calculations happen locally in your browser. Your amounts, tax rates, and results are never sent to any server, stored, or tracked. Your privacy is fully protected.

Yes. Sales tax, VAT (Value Added Tax), and GST (Goods and Services Tax) all follow the same percentage-based calculation. Enter the applicable rate for your country or region, and the calculator will work for any type of consumption tax.

Sales tax is calculated by multiplying the price before tax by the tax rate. For example, if the price is $100 and the tax rate is 8%, the tax amount is $100 × 0.08 = $8. The total price is $100 + $8 = $108. For after-tax calculation, divide the total by (1 + tax rate) to find the price before tax.

To remove tax from a total price, use the formula: Price Before Tax = Total ÷ (1 + Tax Rate). For example, if the total is $108 and the tax rate is 8% (0.08), the price before tax is $108 ÷ 1.08 = $100. The tax amount is $108 - $100 = $8.

Absolutely. The tool is fully responsive and works on all devices — desktops, laptops, tablets, and smartphones. The layout adapts to your screen size for a comfortable experience on any device.