Sales Tax Calculator
Add sales tax to a price or remove tax from a total to find the net amount.
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How it works
In add-tax mode you enter a pre-tax amount and a tax rate; the tool multiplies to find the tax and adds it for the total. In remove-tax mode you enter a tax-inclusive total and it works backward — dividing by one plus the rate — to recover the net price and the tax portion. This reverse calculation is handy for receipts that show only the final amount. Currency formatting is configurable, and all arithmetic runs locally in your browser.
total = amount × (1 + rate)
net = total ÷ (1 + rate)
Common use cases
- Adding local sales tax to a quoted price to see the final cost.
- Backing out the tax already baked into a receipt total.
- Comparing a price across two different tax rates.
Frequently asked questions
How does removing tax from a total work?
A tax-inclusive total equals the net price times one plus the rate. Dividing the total by (1 + rate) recovers the net price, and the difference is the tax — useful when a receipt shows only the final amount.
Can I use it for VAT or GST?
Yes. The math is identical for any single-rate consumption tax — enter your VAT or GST percentage in place of the sales-tax rate.
Does it handle different currencies?
Yes. The currency symbol, separators, and decimal places are configurable, so results format correctly for your locale. The calculation itself is currency-agnostic.
Embed this tool
Add this free sales tax calculator to your own website or blog — copy the code below and paste it into your page HTML. No signup, no API key.
<iframe src="https://otoolrun.com/embed/sales-tax-calculator/" width="100%" height="560" style="border:0;border-radius:12px" loading="lazy" title="Sales Tax Calculator"></iframe>
<p style="font-size:14px"><a href="https://otoolrun.com/tools/sales-tax-calculator/">Sales Tax Calculator by oToolRun</a></p>