What is this calculator?
Add sales tax to a price or extract it from an inclusive total.
What can you use it for?
Use this tool to compare a financial scenario using the assumptions you control. Add sales tax to a price or extract it from an inclusive total.
How to use it
- Enter price excluding tax.
- Enter tax rate (%).
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
Tax amount = price excluding tax × tax rate/100
The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.
Worked example
Price excluding tax: 1000, Tax rate (%): 15. The result is 1,150 (tax-inclusive total).
Assumptions and limits
This is a mathematical estimate using the values you enter. Confirm real product terms, fees, tax rules and dates before acting on it.
Frequently asked questions
What inputs does the Sales Tax Calculator need?
Use price excluding tax, tax rate (%). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Sales Tax Calculator?
This is a mathematical estimate using the values you enter. Confirm real product terms, fees, tax rules and dates before acting on it.