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Sales Tax Calculator

Add sales tax to a base price, or extract the base price from a tax-inclusive total.

Sales tax formulas

Taxtax = price × rate
Totaltotal = price × (1 + rate)
Price before taxprice = total1 + rate

Worked examples

  1. $250 purchase at 8.875% (New York City).

    1. Tax = 250 × 0.08875 = 22.1875
    2. Total = 250 + 22.19

    Answer: Tax $22.19, total $272.19

  2. A receipt total is $107.25 including 7.25% tax. What was the price?

    1. 107.251.0725

    Answer: $100.00 (tax $7.25)

Tips & common mistakes

  • To remove tax, divide by (1 + rate) — subtracting the rate from the total gives the wrong answer.