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Toolvica

Sales Tax Calculator

Calculate the sales tax amount and final price for any purchase. Free, fast, and accurate.

Enter any two fields to calculate the third

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See combined state + local rates →

State base rate is pre-filled; add any local (county/city) surtaxes for your exact combined rate.

Try:

Table of Contents

How to Use the Sales Tax Calculator

  1. Select your preferred currency from the currency dropdown.
  2. Enter the before-tax price of the item in the "Before Tax Price" field.
  3. Enter your combined state + local sales tax rate percentage in the "Sales Tax Rate" field. Many jurisdictions stack state, county, and city taxes — check your local tax authority for the exact combined rate.
  4. Optionally, enter the after-tax price to auto-calculate the tax rate instead.
  5. View the sales tax amount, final price, and a step-by-step breakdown instantly.

About Sales Tax Calculator

A sales tax calculator is a free online tool that helps you quickly determine the sales tax amount and final price of a product or service. It saves you time compared to manual calculations and ensures accuracy every time.

Sales tax is a consumption tax paid to a government on the sale of certain goods and services. The tax rate varies by state, county, and city in the United States, and by country for VAT (Value-Added Tax) systems worldwide. The same math works for both — enter your total rate to calculate tax amounts for US sales tax or EU-style VAT.

Our calculator lets you compute any one of the three values — before-tax price, tax rate, or after-tax price — given the other two. This makes it useful for shoppers, business owners, and accountants alike.

In the United States, sales tax rates range from 0% to over 10% depending on the state and local jurisdiction.

Knowing your local combined rate (state + county + city) is key to accurate budgeting. Many items such as unprepared groceries, prescription drugs, and certain services are exempt from sales tax in several states, so the effective tax you pay depends on both your location and what you buy.

How to Calculate Sales Tax

Sales tax is calculated by multiplying the before-tax price by the tax rate:

After-Tax Price = Before-Tax Price × (1 + Tax Rate / 100)

Sales Tax Amount = Before-Tax Price × Tax Rate / 100

Before-Tax Price = The original price of the item

Tax Rate = Sales tax percentage

Tax Amount = Price × Rate / 100

Final Price = Price + Tax Amount

Example:

A $150 item with 8.5% sales tax.

  1. Tax amount: $150 × 8.5 / 100 = $12.75
  2. Final price: $150 + $12.75 = $162.75

Real-Life Examples

Electronics Purchase

A laptop priced at $999.99 with 8.875% NYC sales tax. Tax: $88.75. Final price: $1,088.74.

Clothing Shopping

A $200 outfit in Texas with 8.25% sales tax. Tax: $16.50. Final price: $216.50.

Electronics Purchase

An $85 electronics accessory in California with 7.25% state tax. Tax: $6.16. Final price: $91.16.

Online Purchase

A $50 gadget bought online from a state with 6% sales tax. Tax: $3.00. Final price: $53.00.

Frequently Asked Questions

How do I calculate sales tax?
Multiply the before-tax price by the tax rate and divide by 100 to get the tax amount. Add the tax amount to the original price to get the final price. For example, $100 at 8% tax: $100 × 8/100 = $8 tax, final price = $108.
What is the formula for sales tax?
The formula is: After-Tax Price = Before-Tax Price × (1 + Tax Rate / 100). The sales tax amount is: Tax = Before-Tax Price × Tax Rate / 100.
How do I find the before-tax price from the after-tax price?
Divide the after-tax price by (1 + tax rate / 100). For example, if you paid $108 with 8% tax: $108 / (1 + 0.08) = $108 / 1.08 = $100 before tax. This works for both US sales tax and VAT — enter your VAT rate as the percentage and the total (VAT-inclusive) price as the after-tax price.
How do I calculate the tax rate from two prices?
Subtract the before-tax price from the after-tax price to get the tax amount, then divide by the before-tax price and multiply by 100. Tax Rate = (After-Tax − Before-Tax) / Before-Tax × 100.
Does sales tax vary by state?
Yes. In the U.S., five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Other states range from about 2.9% to 7.25% at the state level, with additional local taxes that can push the total rate above 10% in some areas.
Does this work for VAT (Value-Added Tax) too?
Yes — the same math applies. VAT is a consumption tax used in over 160 countries, typically included in the displayed price (VAT-inclusive). Enter the total (VAT-inclusive) price in the "After-Tax Price" field and your VAT rate in the "Sales Tax Rate" field, or enter the pre-VAT price to compute the tax amount. The calculator handles both US-style point-of-sale sales tax and EU-style VAT identically.

Disclaimer

This Sales Tax Calculator is provided for informational and educational purposes only. It produces estimates based on the inputs you provide and does not constitute tax advice, a recommendation, or a substitute for professional guidance.

Sales tax rates vary by state, county, city, and the type of goods or services purchased. Certain items such as unprepared groceries, prescription medications, and manufacturing equipment may be exempt or taxed at a reduced rate. Always consult a qualified tax professional or your state's tax authority for accurate, jurisdiction-specific guidance.

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