🛒 Sales Tax Calculator

Quick-fill from US State

🛍️ Multi-Item Sales Tax Calculator

Add multiple items and calculate total tax at once.

Tax Rate (%)

🗺️ US State Sales Tax Rates

Click any state to use its rate in the calculator.

State	State Rate	Avg Combined (with local)	Notes

* Combined rates include average local/county taxes. Actual local rates vary by city. Source: Tax Foundation 2024.

📐 Sales Tax Formulas

Add Tax to Price (Tax-Exclusive)

Tax Amount = Price × (Tax Rate / 100)
Final Price = Price + Tax Amount
Final Price = Price × (1 + Tax Rate / 100)

Example: $100 item, 8.5% tax
Tax = $100 × 0.085 = $8.50
Total = $100 + $8.50 = $108.50

Remove Tax from Price (Tax-Inclusive / Reverse)

Given a price that ALREADY includes tax, find the original price and tax amount.

Pre-Tax Price = Final Price / (1 + Tax Rate / 100)
Tax Amount = Final Price − Pre-Tax Price

Example: $108.50 total, 8.5% tax
Pre-Tax = $108.50 / 1.085 = $100.00
Tax = $108.50 − $100.00 = $8.50

Find Tax Rate

Tax Rate = (Tax Amount / Pre-Tax Price) × 100
OR
Tax Rate = ((Final Price / Pre-Tax Price) − 1) × 100

Example: Paid $108.50, item was $100
Tax Rate = (8.50 / 100) × 100 = 8.5%

Multi-Item with Different Tax Categories

Some items may be tax-exempt or taxed differently:
Food (groceries): often exempt or reduced rate
Clothing under $110: exempt in some states (NY, PA)
Digital goods: taxed differently state by state
Prescription drugs: usually exempt

Total Tax = Σ (taxable_item_price × applicable_rate)

❓ Frequently Asked Questions

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🛒 Sales Tax Calculator