Finance
Sales Tax Calculator
Calculate sales tax amount and total price, or reverse-calculate from total.
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What is Sales Tax Calculator?
A sales tax calculator computes the tax amount and total price when purchasing goods or services. It handles varying state and local tax rates across the US, and can reverse-calculate the pre-tax price from a total amount that includes tax.
How to Use
- Enter the item price before tax
- Enter the sales tax rate (or select your state for the default rate)
- See the tax amount and total price instantly
- Use reverse mode to find the pre-tax price from a tax-inclusive total
Formula
Tax Amount = Price x (Tax Rate / 100); Total = Price + Tax Amount
Frequently Asked Questions
- Which US states have no sales tax?
- Alaska, Delaware, Montana, New Hampshire, and Oregon have no statewide sales tax. However, Alaska allows local municipalities to levy their own sales taxes.
- How do I calculate tax from a total that already includes it?
- Pre-tax price = Total / (1 + Tax Rate). For example, a $107 total with 7% tax: $107 / 1.07 = $100 pre-tax.
- Do online purchases have sales tax?
- Yes, since the 2018 Supreme Court ruling (South Dakota v. Wayfair), most online retailers collect sales tax based on the buyer's state and local rates.