Sales Tax Calculator
Add sales tax to a price to find the total amount you'll pay.
Comment ça marche
This calculator adds sales tax to a price to find the total you'll actually pay at checkout: tax = price × (tax rate ÷ 100), and total = price + tax. On a $50 item at an 8% sales tax rate, tax = $4.00 and the total comes to $54.00.
Sales tax rates aren't universal — they vary by country, and within countries like the US, by state, county, and sometimes even city, often stacking multiple local rates into one combined rate. This calculator is rate-agnostic by design: enter whatever combined rate applies where you're shopping, since there's no single "correct" default rate to assume.
Going the other direction — finding the pre-tax price from a total you already paid — uses a different formula: pre-tax price = total ÷ (1 + tax rate as a decimal). If a receipt shows $54.00 total at an 8% rate, the pre-tax price was 54 ÷ 1.08 = $50.00.
Sales tax (common in the US) and VAT (Value Added Tax, common in the EU, UK, and many other countries) achieve a similar end result — adding a percentage to the price — but work differently behind the scenes: sales tax is collected only once, at the final retail sale, while VAT is collected incrementally at each stage of production and distribution. For calculating VAT specifically (including reversing a VAT-inclusive price), the dedicated VAT Calculator handles both directions directly.
Not everything is taxed at the same rate, or at all — many jurisdictions exempt or reduce tax on categories like groceries, prescription medication, or children's clothing. Always check the rate that actually applies to your specific purchase and location rather than assuming a flat rate.
Some countries also display prices tax-inclusive by default (the sticker price already includes tax, as is common in much of Europe), while others — notably the US — display tax-exclusive prices and add tax only at checkout. This calculator works for either convention; just be clear on whether your starting "price" already includes tax or not before adding this calculator's tax on top.
Can I find the pre-tax price from a total?
This tool goes price → total; for reverse calculations, divide the total by (1 + rate).
Why do some countries show tax-inclusive prices while the US doesn't?
It's largely a regulatory and retail convention difference — many countries (especially in Europe) require or default to displaying the final tax-inclusive price, while US retail commonly shows the pre-tax price and adds tax at checkout.
Why do sales tax rates vary so much by location?
Sales tax is typically set by state, county, and sometimes city governments, and rates get combined into one total — that's why identical purchases can be taxed differently just a few miles apart.
What's the difference between sales tax and VAT?
Sales tax is collected once, at the final sale to the consumer. VAT is collected at each stage of production and distribution, though the end consumer typically pays an amount similar to what a comparable sales tax rate would produce.
Are all products taxed at the same rate?
No — many places exempt or reduce tax on certain categories like groceries, medication, or clothing below a certain price. Check your local tax rules for the specific item.
How do I calculate the tax amount alone, not the total?
Tax amount = price × (tax rate ÷ 100) — this calculator shows that figure separately from the total, so you can see exactly how much of the final price is tax.
Does this work for combined state and local tax rates?
Yes — simply enter the full combined rate (state + county + city, if applicable) as a single percentage, since the math is the same regardless of how many jurisdictions contribute to that rate.
Can I use this calculator outside the US?
Yes, for any flat-percentage sales tax — for VAT-style taxes that need reverse (gross-to-net) calculation, the dedicated VAT Calculator is built specifically for that.
How is sales tax different from income tax?
Sales tax is charged on purchases at the point of sale; income tax is charged on earnings. They're calculated completely differently and usually go to different levels of government.
Why did my receipt show a slightly different tax amount than expected?
Rounding rules and per-item versus per-transaction tax calculation can create small differences of a cent or two from a straightforward percentage calculation — this is normal and not a sign of an error.