Sales Tax Calculator Free Online
Calculate sales tax (or VAT/GST) given pre-tax price + rate, or reverse it: extract the pre-tax amount from a tax-included total. Works for US sales tax, EU VAT, UK VAT, AU GST.
Results
Pro — bulk batch calculation, API access, history & favorites
API access · Priority queue · Team workspace
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Sales Tax Calculator Features
Forward & Reverse
Calculate tax from pre-tax price (forward), or extract pre-tax amount from a tax-included receipt (reverse). Both directions handled.
US, EU, UK, AU Presets
One-click chips for California 7.25%, New York 8.875%, Texas 8.25% (state portion), UK VAT 20%, EU standard VAT 21%, Australia GST 10%.
VAT vs Sales Tax
VAT is included in displayed prices (Europe). US sales tax is added at checkout. The reverse mode handles VAT-style "tax-included" totals.
Live Calculation
Change any input, all values update instantly.
Receipt Verification
Reverse mode is great for splitting business expenses or checking that a receipt's tax math is correct.
100% Private
All math runs in your browser.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Full sales tax calculation | ||
| Live calculation | ||
| Quick presets | ||
| Bulk CSV / Excel calculation | — | |
| REST API access | — | |
| Save & share calculations | — |
Frequently Asked Questions
Tax = Pre-tax × Rate. Total = Pre-tax × (1 + Rate). Example: $100 × 8.25% = $8.25 tax, $108.25 total.
Pre-tax = Total ÷ (1 + Rate). Example: $108.25 ÷ 1.0825 = $100 pre-tax. Tax = Total − Pre-tax = $8.25.
Sales tax (US) is added at the final point of sale and shown separately. VAT (EU/UK) is collected at every step of production but displayed prices already include it. Mathematically the calculator handles both via the "amount is total" toggle.
States set their own rates (0% in OR/MT/NH/DE/AK to ~7.25% in CA). Cities and counties add local sales tax on top, so combined rates can reach 9.5%+ in places like Chicago or LA.
Yes — most US states exempt groceries, prescription drugs, and some clothing. UK VAT has zero-rated (food, books) and reduced (5%) categories. This calculator assumes full taxable rate.