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FinanceUnited States versionFormula-based · Runs in your browser

Sales Tax Calculator

Calculate subtotal, sales tax, and total for one or more items.

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Preparing saved example…

Inputs

Enter the values you know. Optional fields may be left empty.

Local save controls below
Required
$
Required
Required
%

Result

Updates as valid inputs change.

Calculated locally
Total
—
Subtotal
—
Sales tax
—
Total per item
—

Saved locally, explained clearly

Drafts, calculations, scenarios, and workflow progress stay in this browser unless you export them.

Opening local database…

Calculation steps

Follow what happened from the selected formula to the displayed answer.

Show substituted values and intermediate working
Calculate current inputs to see the working.
  1. 1

    Formula selected

    The calculator uses the following formula or method.

    Tax = price × quantity × tax rate; total = subtotal + tax

  2. 2

    Values entered

    Your values are placed into the calculation.

    Enter values to see what is used in this step.

  3. 3

    Result calculated

    The formula or method produces the following result values.

    Results will appear after a successful calculation.

  4. 4

    Answer formatted

    Displayed values are rounded and formatted using each output’s configured precision.

Scenario comparison

Save working scenarios, then select two or three to compare. Formula versions and inputs remain visible.

No scenarios saved for this calculator yet.

Recent calculations

Successful calculations are retained locally according to your privacy settings.

No local history for this calculator yet.

Data and privacy
Additional planning scenario: Sales Tax Calculator

The original calculator and its saved-project input names remain unchanged above. This additional model is independent: use its own share-link button, not the original calculator’s project or export controls.

Add or extract general retail tax with dated Canadian rates or a US state/base reference plus your separately verified local component. A population-weighted state average is never used as a transaction rate.

Formula: Exclusive tax = price × combined rate. Inclusive pretax price = total / (1 + combined rate).

Preparing saved example…

Inputs

Enter the values you know. Optional fields may be left empty.

Separate scenario — use its own link
Required
USD
Required
Required
Required
Required
%
Required
%

Result

Updates as valid inputs change.

Calculated locally
Illustrative defaults are not local quotes or verified legal rules. Dated reference components and user-entered assumptions are explicitly distinguished. Professional review is pending.
Total including tax
—
Price before tax
—
Combined rate used, %
—
Sales tax
—

The main page’s project/export controls apply to the original calculator, not this separate scenario. A scenario link includes its input values.

Scope and limitations

  • Planning calculation, not a tax return, benefit decision, credit approval or legal opinion. No eligibility is inferred from a numeric result.
  • Only the stated tax year and expressly supported rule components are included. Entered amounts require independent verification.

Reference scope

  • US income authority — retrieved 2026-09-24. Use only the expressly supported schedule components; this link does not validate unrelated taxes.
  • Tax Foundation original July 2026 state/local rate research — retrieved 2026-09-25. 51 published state-level general-rate reference rows. Weighted local rates and maxima are rounded research figures, not an address lookup or statutory cap; special products and exemptions need transaction-specific checks.
  • missouri tax authority — retrieved 2026-09-25. 51 published state-level general-rate reference rows. Weighted local rates and maxima are rounded research figures, not an address lookup or statutory cap; special products and exemptions need transaction-specific checks.
  • minnesota tax authority — retrieved 2026-09-25. 51 published state-level general-rate reference rows. Weighted local rates and maxima are rounded research figures, not an address lookup or statutory cap; special products and exemptions need transaction-specific checks.
  • new-mexico tax authority — retrieved 2026-09-25. 51 published state-level general-rate reference rows. Weighted local rates and maxima are rounded research figures, not an address lookup or statutory cap; special products and exemptions need transaction-specific checks.
  • new-jersey tax authority — retrieved 2026-09-25. 51 published state-level general-rate reference rows. Weighted local rates and maxima are rounded research figures, not an address lookup or statutory cap; special products and exemptions need transaction-specific checks.

How it works

The item price is multiplied by quantity. Sales tax is then added to that subtotal.

Input query strings and outputs

Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.

Input query strings

3
  • ?price= Price per item

    Money · Required · Default: 100

  • ?quantity= Quantity

    Number · Required · Default: 1

  • ?taxRate= Sales tax rate

    Percentage · Required · Default: 8.25

Outputs

4
  • total Total

    Currency · Primary output

  • subtotal Subtotal

    Currency

  • taxAmount Sales tax

    Currency

  • totalPerItem Total per item

    Currency

Tax rate

Enter the rate that applies to the purchase. The calculator does not look up local rates.

Sources
  • No external reference is listed for this calculator. Its formula and variable definitions are shown above.
Limitations
  • Estimates use the rates, timing, and assumptions entered. Fees, taxes, lender rules, and future changes are included only where explicitly shown.

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