Sales Tax Calculator

What the Sales Tax Calculator does

This tool figures out US-style sales tax, the kind that gets added on top of a listed price at the register rather than baked into it. You give it a starting price and a tax rate, and it tells you what the customer actually pays. It helps shoppers checking a receipt, small business owners quoting prices, cashiers double checking a till, and anyone who wants to know how much of a total is tax.

Every calculation returns three clear numbers: the total with tax, the sales tax amount by itself, and the pre-tax amount you started with. That makes it easy to copy the exact figure you need onto a quote, an invoice, or an expense note.

How to use it

1. Enter your price in the Amount before tax field.
2. Set your rate in the Sales tax rate (%) field (for example 8.25).
3. Click Calculate to see the total, the tax, and the pre-tax amount.
4. Change either field to test a different price or rate right away.

A quick worked example

Say a product is listed at 100 and the local rate is 8.25%. The tax works out to 8.25, so the total with tax is 108.25, and the pre-tax amount stays 100. The math is simply price times the rate, then added back on top. Remember that US sales tax rates combine state, county, and city portions, so the right rate depends on where the sale takes place.

This calculator runs entirely in your browser, so your numbers stay private and are never uploaded. It is completely free, with no sign-up and no limits.