Sales Tax Calculator is a simple online utility that helps you calculate sales tax on purchases or determine the pre-tax price from a total amount.
This tool allows you to:
- Enter a pre-tax price and a tax rate to find the tax amount and total
- Enter a total amount with tax and a tax rate to find the original pre-tax price
- Select a US state to automatically apply the correct state tax rate
It is designed to be fast, simple, and accurate, making it useful for everyday shopping, budgeting, and business calculations.
How the Sales Tax Calculator Works
Using the tool is straightforward.
- Choose your calculation mode: “Calculate Tax” or “Remove Tax from Total”
- Optionally select a US state to auto-fill the state sales tax rate
- Enter or confirm the tax rate (%)
- Enter your price amount
- Instantly see the tax breakdown and totals
The calculator processes your inputs and returns results immediately — no button press required.
What This Tool Calculates
Depending on your mode, the tool displays:
- Pre-Tax Amount — the original price before tax
- Tax Rate — the percentage applied
- Tax Amount — the dollar amount of tax charged
- Total Amount — the final price including tax
This makes it easy to understand the full cost of a purchase without manual arithmetic.
Calculation Modes
Calculate Tax (Forward)
Enter a pre-tax price and a tax rate. The calculator returns the tax amount and the total price you will pay.
Formula: Tax Amount = Pre-Tax Price × (Tax Rate / 100)
Remove Tax from Total (Reverse)
Enter a total amount that already includes tax and a tax rate. The calculator returns the original pre-tax price and the tax portion.
Formula: Pre-Tax Price = Total Amount / (1 + Tax Rate / 100)
US State Tax Rates
The tool includes a preset list of all 50 US state base sales tax rates. Selecting a state automatically fills in the corresponding rate. You can always override the rate manually for local or combined tax rates.
Note: State rates shown are base state rates. Local/county rates may apply on top of the state rate.
Why Use This Tool
Using Sales Tax Calculator helps you:
- Save time on manual calculations
- Reduce arithmetic errors
- Quickly check the tax on any purchase
- Verify prices before checkout
- Reverse-calculate pre-tax prices from receipts
Whether you are shopping, preparing invoices, or auditing receipts, this tool simplifies the process.
Try the Sales Tax Calculator
Enter your values in the calculator above to instantly see the result.
No signup required. Works instantly in your browser.
Frequently Asked Questions
What does the Sales Tax Calculator do?
The tool allows you to calculate sales tax on a price or remove tax from a total by processing the inputs you provide and returning the tax amount, pre-tax price, and total.
Is this calculator accurate?
The tool performs calculations using standard sales tax formulas and provides reliable results. For official tax reporting, always verify with your jurisdiction’s current rates.
Is my data stored?
No. All calculations run locally in your browser, and no input data is stored or transmitted.
Does it include local and county taxes?
The preset rates reflect base state sales tax rates only. Local and county taxes vary by city and county. You can manually enter a combined rate if you know it.
Is this tool a substitute for professional tax advice?
No. This tool is intended for informational and general-use purposes only and does not replace advice from a qualified tax professional.