Calculate sales tax for any purchase amount. Add tax to a price, remove tax from a total, or find the tax rate. Includes US state tax rates.
Total with Tax
$108
Sales Tax
$8
8.25% rate
| Price | Tax | Total |
|---|---|---|
| $25 | $2 | $27 |
| $50 | $4 | $54 |
| $100 | $8 | $108 |
| $500 | $41 | $541 |
| $1,000 | $83 | $1,083 |
Alaska
0% tax
Delaware
0% tax
Montana
0% tax
New Hampshire
0% tax
Oregon
0% tax
Note: Alaska has no state sales tax but allows local municipalities to charge sales tax.
Combined rates include average local taxes. Actual rates vary by city/county.
Add Tax to Price
Total = Price × (1 + Tax Rate)
Example: $100 × 1.08 = $108
Remove Tax from Total
Original Price = Total ÷ (1 + Tax Rate)
Example: $108 ÷ 1.08 = $100
Find Tax Rate
Tax Rate = (Total - Original) ÷ Original × 100
Example: ($108 - $100) ÷ $100 × 100 = 8%
Total with Tax
$108
Sales Tax
$8
8.25% rate
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.
Compare how different tax rates affect your purchase total
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To calculate sales tax, multiply the price by the tax rate as a decimal. For example: $100 × 0.08 (8%) = $8 sales tax. Total = $108. To find the original price from a total including tax: divide total by (1 + tax rate). $108 ÷ 1.08 = $100.
The average combined state and local sales tax in the US is about 7.12%. However, rates vary significantly: some states have no sales tax (Alaska, Delaware, Montana, New Hampshire, Oregon), while others like Tennessee and Louisiana have combined rates over 9%.
Common exemptions include: groceries (most states), prescription medications, medical equipment, some clothing (varies by state), and items for resale. Each state has different rules. Some have tax holidays for back-to-school items or emergency supplies.
Sales tax is collected only at final sale to consumers. VAT (Value Added Tax) is collected at each stage of production/distribution. VAT is common outside the US and is typically already included in displayed prices, while US sales tax is added at checkout.
Yes, since the 2018 Supreme Court ruling (South Dakota v. Wayfair), states can require online retailers to collect sales tax even without physical presence. Most major retailers now collect tax based on shipping address. You may owe "use tax" on untaxed purchases.
To reverse-calculate the pre-tax price from a total that includes tax: divide the total by (1 + tax rate as decimal). Example: Total $108 with 8% tax → $108 ÷ 1.08 = $100 original price. The tax was $8.
Total with Tax
$108
Sales Tax
$8
8.25% rate