calculationType
Sales Tax Calculator
Calculate sales tax amount and total price including tax. Support for all US state tax rates and custom tax percentages.
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Pick a scenario to see how the calculator works, then adjust the values
Sales Tax Calculator | Calculate Tax Amount & Total Price with Tax
Calculate sales tax amount and total price including tax. Support for all US state tax rates and custom tax percentages.
Key values: $250 · 8.68% CA avg · tax = $21.70
Zero-Tax State: Oregon Purchase of $500
Oregon, Montana, New Hampshire, Delaware, and Alaska have no general state sales tax.
Key values: $500 purchase · 0% sales tax · total = $500
Sales Tax Calculation
For example, a $50 item with 8.5% tax: Tax = $50 × 0.085 = $4.25. Total = $54.25.
Tax-Inclusive vs. Tax-Exclusive Pricing
Tax-Exclusive (US, Canada)
The displayed price does not include tax. Tax is added at checkout. Total = Price + Tax.
Tax-Inclusive (EU, UK, Australia)
The displayed price already includes tax (VAT). To find the pre-tax price: .
Multiple Items
Tax applies to the sum of all taxable items, not individually:
This ensures consistent rounding. Applying tax to each item separately can produce a different total due to rounding at each step.
Frequently Asked Questions
How do I calculate sales tax on a purchase?
Multiply the item price by the tax rate expressed as a decimal. For example, 8.5% tax on a $50 item: \\$50 \times 0.085 = \\$4.25 tax. Total = $54.25.
What is the difference between tax-inclusive and tax-exclusive pricing?
Tax-exclusive (US, Canada) means the displayed price does not include tax — tax is added at checkout. Tax-inclusive (EU, UK, Australia) means the displayed price already includes tax (VAT). To find the pre-tax price from an inclusive total, divide by .
Which US states have no sales tax?
Five states have no general state sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, Alaska allows local jurisdictions to impose their own sales taxes.
Should I calculate tax on each item separately or on the total?
Apply tax to the sum of all taxable items, not individually. Calculating tax per item can produce a different total due to rounding at each step. Most jurisdictions require tax on the subtotal.
How do I find the pre-tax price from a receipt total?
Divide the total by . For example, if the total is $108.50 with 8.5% tax: Pre-tax = \\$108.50 / 1.085 = \\$100.00.
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