Sales Tax Calculator - Add or Remove Tax
Calculate sales tax on any purchase or reverse-calculate the pre-tax price. Supports custom tax rates with common US presets.
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Frequently Asked Questions
How does the Sales Tax Calculator work?
In forward mode, the tool multiplies the pre-tax price by the tax rate (as a decimal) to get the tax amount, then adds it to the price for the total. In reverse mode, it divides the total by (1 + rate) to recover the pre-tax price. Preset rates for common US states are stored in a lookup table for quick selection.
Can I calculate the pre-tax price from a total?
Yes. Enter the total amount paid and the tax rate, and the tool reverse-calculates the original pre-tax price and the tax amount. This is useful for expense reporting and receipt verification.
What tax rates are pre-loaded?
Common US state sales tax rates are available as presets for quick selection. You can also enter any custom tax rate for your specific location or product category.
Does it handle multiple tax rates?
Enter the combined tax rate for your location. For example, if your state charges 6% and your city adds 2%, enter 8% as the total rate.