Sales Tax Calculator Tool

Sales Tax Calculator

Sales Tax Calculator calculates the sales tax amount and final price based on the purchase price and tax rate.

Subtotal: Tax Rate (in %):

Result:

This tool calculates the sales tax amount and the total price including tax.

Sales Tax Amount = Price × (Tax Rate ÷ 100)
Total Price = Price + Sales Tax Amount

Or directly:
Total Price = Price × (1 + Tax Rate ÷ 100)

Item price = $120, Sales tax rate = 8%
Tax amount = 120 × 0.08 = $9.60
Total price = 120 + 9.60 = $129.60

How do I calculate sales tax?

Multiply the taxable price by the tax rate as a decimal.

What is the total price formula?

Total price = original price × (1 + tax rate/100).

Does the calculator work with any tax rate?

Yes, enter whatever percentage applies in your location.

What if the price already includes tax?

Then you need to extract the pre-tax price first (divide total by 1 + tax rate).

Can I calculate tax backwards from the total?

Yes. Pre-tax price = Total ÷ (1 + tax rate/100).

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