Sales Tax Calculator

Add sales tax to a pre-tax price or remove sales tax from a total that already includes it.

Preparing Sales Tax Calculator

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Input

Choose whether you are adding tax or backing tax out of a total, then enter the amount and the tax rate. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Sales Tax Calculator

Enter the purchase amount and the applicable tax rate, and the calculator will show either the tax-on amount or the pre-tax base.

What this calculator is for

This calculator is for receipts, invoices, and purchase planning when you need to separate the tax portion cleanly from the base price. It is helpful both for shoppers and for small-business paperwork.

Tips

Use the local combined rate that actually applies to the transaction rather than a national average.
If a receipt total already includes tax, switch to reverse mode so you do not accidentally tax the amount twice.