Sales Tax Calculator
Add sales tax to a price, or back the tax amount out of a tax-included total.
This calculates a single flat sales tax rate — it doesn't account for jurisdiction-specific rules, exemptions, or combined state/local rates that may apply to your situation.
Overview
A straightforward calculator for the two directions sales tax questions usually go: adding tax to a known pre-tax price, or figuring out the pre-tax price from a total that already includes tax.
- Both directions in one tool
- Instant results with no page reload
How to use it
- 1Choose whether you're adding tax or removing it from a total
- 2Enter the amount and tax rate
- 3Read the before-tax, tax, and total breakdown
Frequently asked questions
Does this account for different tax rates by state or country?
No — you enter whatever flat rate applies to your situation. Combined state, county, and city rates, along with exemptions, vary too much to build into a single generic calculator responsibly.
What does 'back tax out of a total' mean?
If you only know a tax-included total — like a receipt showing $108 that already includes 8% tax — this mode calculates what the pre-tax price and tax amount were.