About the Sales Tax Calculator
The Sales Tax Calculator handles both net-to-gross addition and correct extraction from an already tax-inclusive amount. Extraction divides by one plus the rate rather than simply subtracting the same percentage.
How to use the Sales Tax Calculator
- Choose whether the entered amount excludes or includes tax.
- Enter amount and rate.
- Calculate net, tax component and gross total.
Practical tips
- Tax rules and rounding vary by jurisdiction and invoice type.
- Use the rate applicable to the exact product and location.