How it works
Add a US sales-tax rate to a pre-tax price and see the tax and total.
Enter the pre-tax price and the combined sales-tax rate. The calculator computes the tax amount and the total price.
Formula
Tax = price × rate ÷ 100; total = price + tax.
P- Pre-tax price (currency)
r- Sales-tax rate (%)
Examples
- 100 at 8%Price 100 · rate 8%Tax 8 · total 108
Frequently asked questions
Which rate should I enter?
US sales tax combines state, county, and city rates. Enter your local combined rate; the calculator does not store tax tables.
Are all purchases taxed?
No. Many states exempt groceries, medicine, or certain categories. This calculator applies a flat rate you provide.
How to read the result
The total is the out-the-door price; the tax amount is collected for the taxing authority.
Limitations
A single flat rate; does not model exemptions, caps, or destination-based sourcing rules.
Source: Standard sales-tax net-to-total arithmetic.