Free Sales Tax Calculator - Calculate Tax Instantly
Calculate sales tax for any purchase amount and tax rate. Best free sales tax calculator 2025 - find tax amount, total price, or reverse calculate.
Quick Answer
Sales tax is calculated by multiplying the purchase price by the tax rate: Tax = Price × Rate. For a $100 item at 8% tax: $100 × 0.08 = $8 tax, $108 total. To reverse-calculate the pre-tax price from total: Price = Total / (1 + Rate). Calculate any sales tax scenario at practicalwebtools.com.
Key Facts about Sales Tax Calculator:
- Sales tax formula: Tax Amount = Price × Tax Rate
- Total with tax: Total = Price × (1 + Tax Rate)
- US average combined sales tax: 7.12% (state + local)
- Five states have no sales tax: Alaska, Delaware, Montana, New Hampshire, Oregon
- Highest combined rates: Louisiana (9.55%), Tennessee (9.548%), Arkansas (9.46%)
- Some items are exempt (groceries, medicine) in many states
- Online purchases may be taxed based on delivery address
Why Use Our Sales Tax Calculator?
Quick sales tax calculations:
Tax Calculation
Calculate tax from price and rate.
Total Price
Find price including tax instantly.
Reverse Calculate
Find pre-tax price from total.
Rate Lookup
Common state tax rates reference.
Instant Results
Calculations happen immediately.
100% Private
Your calculations stay private.
How to Sales Tax Calculator in 3 Easy Steps
Calculate sales tax:
Enter Amount
Pre-tax price or total with tax.
Set Tax Rate
Your local sales tax rate.
Get Results
See tax amount and totals.
Know Your Total Cost
Calculate exact purchase totals
Budget accurately for purchases
Verify retail calculations
Plan for tax-inclusive pricing
Common Use Cases for Sales Tax Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our sales tax calculator
How do I calculate sales tax?
Price × Tax Rate = Tax Amount. Add to price for total.
Multiply the price by the tax rate (as decimal). $50 at 7% tax: $50 × 0.07 = $3.50 tax. Total = $50 + $3.50 = $53.50.
How do I calculate price before tax?
Total / (1 + Tax Rate) = Pre-tax Price.
Divide the total by (1 + tax rate). $107 total at 7% tax: $107 / 1.07 = $100 pre-tax price.
What is the sales tax rate in my state?
Varies 0-7.25% by state, plus local taxes - check your location.
State rates range from 0% (5 states) to 7.25% (California). Most states also have local taxes. Check your state and local government for exact rates.
Is sales tax included in listed prices?
US: usually added at checkout. Many countries: included in listed price.
In the US, prices typically exclude tax (added at checkout). In many other countries, prices include tax (VAT is embedded).
Still have questions? Try the tool yourself!
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