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Sales Tax Calculator

Calculate the tax amount and total from a price and sales tax rate.

01 / INPUTS

amount
%

02 / RESULT

TOTAL

108

Tax amount
8
Total
108

Calculation trace

  1. 100 × 8% ÷ 100 = 8
    8
    Tax amount
  2. 100 + 8 = 108
    108
    Total
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How it works

Tax = price × tax rate ÷ 100, and total = price + tax. You enter the tax rate that applies where you are.

Assumptions & limits

  • The tax rate is user-supplied — no rates are built in.
  • A single combined rate is applied to the whole price.
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FAQ

Why isn’t my local rate pre-filled?
Sales-tax rates vary by state, county and city and change over time, so we do not embed them — enter your current combined rate.
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Related calculators

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SOURCES

  • OpenStax, Rice University
    Prealgebra 2e ↗

    Percent applications — sales tax (price × rate) and total; the tax rate is user-supplied

    Accessed 2026-08-23