Sales Tax Calculator
Calculate sales tax, add tax to a price, or remove tax from a tax-inclusive price. Useful for shopping, invoices, quotations, and retail pricing.
Tax Amount = Price × Tax Rate / 100
Final Price = Price + Tax Amount
Pre-tax Price = Tax-Inclusive Price ÷ (1 + Tax Rate / 100)
A price of 100 with 8% sales tax gives 8 tax and a final price of 108.
Choose whether to add or remove tax, enter the price and tax rate, then calculate.
Use it for shopping, quotations, invoices, and checking final purchase prices.
Common mistakes include using the wrong tax rate, adding tax twice, or removing tax with simple subtraction.
Examples
Example 1: Add tax
Price: 100
Tax Rate: 8%
Example 2: Remove tax
Tax-inclusive price: 108
Tax Rate: 8%
Example 3: Tax only
Price: 250
Tax Rate: 8%
When to Use This Calculator
- Add tax to product price
- Remove tax from total price
- Check receipts
- Prepare quotations
- Compare before-tax and after-tax prices
How It Works
- Choose add or remove tax.
- Enter the price and rate.
- The calculator applies the correct tax formula.
Common Mistakes
- Adding tax twice
- Using the wrong tax rate
- Removing tax by subtraction
- Rounding too early
Related Calculators
Frequently Asked Questions
What is sales tax?
Sales tax is a tax added to the sale price of goods or services in some locations.
How do I add sales tax?
Multiply the price by the tax rate and add the tax amount to the price.
How do I remove sales tax?
Divide the tax-inclusive price by 1 plus the tax rate as a decimal.
Can I change the tax rate?
Yes. Enter any tax rate required for your location.
Is this the same as VAT?
The calculation method is similar, but the tax rules may differ by country or region.