Sales Tax Calculator
Use the Sales Tax Calculator when you want to see how the figures change under a particular set of assumptions. Enter the values you know, review the result and compare a second scenario if you are weighing an option.
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Last reviewed January 15, 2026 — see our editorial & accuracy policy.
Method: Tax = price × rate; reverse mode divides the total by (1 + rate). US state rates vary — see our per-state pages for current 2026 rates.
How it works
The tax is the amount multiplied by the rate: Tax = Amount × (Rate ÷ 100). The total is the original amount plus the tax. The same method works for VAT or GST, just enter the relevant rate.
How to use the Sales Tax Calculator
Enter the values requested by the tool and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options. Keeping a note of the original figures makes the calculation easier to check later.
Use the result as a planning estimate rather than a quote or guarantee. Rates, fees, tax rules and personal circumstances can change the final figure.