Sales Tax Calculator
Calculate sales tax, a before-tax price, or the tax rate.
Solve the missing price or sales tax rate.
Result
How to use this calculator
Solve the missing price or sales tax rate. Enter amounts in the units shown, select the applicable options, and click Calculate. Use Reset to restore the starting values.
Calculation formula
After-tax price = before-tax price × (1 + tax rate).
Assumptions and accuracy
Review timing, rates, fees and result notes when comparing scenarios. Future returns and rates are assumptions rather than guaranteed outcomes. Monetary display follows the currency’s precision; intermediate calculations retain additional digits.
Choose what to calculate
Sales tax calculator
Find the pre-tax price from an after-tax total and entered tax rate, or solve the total or rate. Local tax rates must be supplied by the user.
Open this calculationReverse sales tax calculator from total price
Find the pre-tax price from an after-tax total and entered tax rate, or solve the total or rate. Local tax rates must be supplied by the user.
Open this calculationUnderstanding this calculation
Add sales tax, remove it from an inclusive total or solve for an implied tax rate. The relationship uses a single entered taxable price and rate.
Worked examples
Add 7 percent sales tax to a price
Illustrative inputs are specified in the steps below; the example link loads the complete settings. Unmentioned settings use the linked defaults.
- Tax is 100 × 7% = 7; total price is 100 + 7 = 107. The rate is user-entered, not a jurisdiction lookup.
After-tax price: 107 USD.
Try these inputsCommon questions
How do I remove sales tax from a total?
Divide the tax-inclusive amount by 1 plus the rate as a decimal; do not subtract that percentage of the inclusive amount.
Can I use the calculator to look up my local tax rate?
No. The rate is an input or a solved relationship between entered prices, not an address-based tax lookup.
Scope and assumptions
The tool does not determine item exemptions, tax jurisdictions or every invoice rounding rule. Enter the applicable rate and taxable base.
Sources
- Calculation methodology, rule versions and testing limitations
- Reference calculator for feature comparison (not a model-parity certification)
Calculation notes checked . Examples are mathematical checks under the stated assumptions.
Calculation methods and formulas
After-Tax Price
Solve the missing price or sales tax rate.
After-tax price = before-tax price × (1 + tax rate).
Before-Tax Price
Solve the missing price or sales tax rate.
After-tax price = before-tax price × (1 + tax rate).
Sales Tax Rate
Solve the missing price or sales tax rate.
After-tax price = before-tax price × (1 + tax rate).
See our calculation methodology and review status for data versions, rounding and validation limitations.