How do I reverse calculate sales tax?
To find the pre-tax price from a total, divide the total by (1 + Tax Rate). For example, if the total is $107 and tax is 7%, you calculate $107 / 1.07 = $100.
Tool Categories
Free Sales Tax Calculator | 1ClickTools
Instantly add sales tax to a price, or reverse-calculate to find the pre-tax amount from a total receipt. 100% free.
Frequently Asked Questions
Is VAT calculated the same way?
Yes, Value Added Tax (VAT) is a percentage-based tax applied to the purchase price, just like standard sales tax.
Why do US states have different tax rates?
In the US, there is no federal sales tax. Instead, individual states, counties, and cities set their own sales tax rates, which are combined at the register.
How accurate is this sales tax calculator tool?
All processing runs entirely in your browser using verified algorithms. Results are computed with full double-precision — no server-side rounding or data transmission occurs.
How does 1ClickTools ensure my privacy and file security?
Privacy is our highest priority. All computations, data parsing, and file conversions take place locally inside your web browser's client-side memory using modern JavaScript and HTML5 APIs. Your data is never uploaded, stored, or transmitted to any external remote server.