Sales Tax Calculator — Free Online

Why use Sales Tax Calculator?

US sales tax varies by state, county and city — sometimes by ZIP code. When you need to add tax to a quote or back out the pre-tax price from a receipt, this calculator does both in a single click.

How it works

Enter the amount — Either the pre-tax price or the total.
Enter the local tax rate — Most states publish a combined state + local rate.
Pick mode — "Add" computes total; "Remove" computes pre-tax from total.

Tips & best practices

Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire and Oregon.
California has the highest base rate at 7.25% (plus local).
Online sellers must collect tax in states where they have nexus (Wayfair v. South Dakota).

Frequently asked questions

How do I find my local rate?+

Search your state's Department of Revenue site or use the ZIP-code lookup at avalara.com.

Is sales tax the same as VAT?+

No. VAT is collected at every step of production; US sales tax is only at the final sale.

Are services taxed?+

Depends on the state — tangible goods almost always are; services vary widely.

Does this work for any country?+

The math works for any flat consumption tax — just enter the local rate.