About the Sales Tax Calculator
Estimate how a stated tax rate changes a price. Switch between tax-exclusive and tax-inclusive prices to see the difference.
Formula or method
Tax-exclusive total = net price × (1 + tax rate). For a tax-inclusive price, net price = gross price ÷ (1 + tax rate).
Worked example
At an 8% rate, a tax-exclusive item priced at 100 totals 108. For a tax-inclusive price of 108, the net price is 100 and tax is 8.
How to use the tool
Start with the example values above, then replace each input with your own figures. The results update immediately. Review the units, denominators, and assumptions before using any number in an important decision.
Assumptions and limitations
This is a basic single-rate model, not jurisdiction-specific tax advice. Different items, exemptions, delivery fees, rounding requirements and multiple rates may apply.
Frequently asked questions
Why is removing 8% tax not the same as subtracting 8%?
The gross price already includes the tax, so remove it by dividing by 1.08, not by subtracting 8% of the gross amount.
Privacy and support
Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.