Universal Sales Tax, VAT & GST Calculator

Compute forward tax additions or reverse pre-tax net values from gross receipts with custom rates across USD, GBP, EUR, AUD, and CAD. Built by SYED MUQEEM.

Forward & Reverse Tax Mathematics

Essential tax accounting calculations for retail, commercial billing, and international invoicing.

Forward & Reverse Tax Modes

Easily calculate tax to add on top of net amounts, or reverse-calculate pre-tax net figures from tax-inclusive totals.

Multi-Currency Formatting

Switch between US Dollars ($), British Pounds (£), Euros (€), Australian Dollars (A$), and Canadian Dollars (C$).

Common Regional Tax Presets

Quickly apply standard benchmarks including UK 20% VAT, Australian 10% GST, and common North American sales tax brackets.

100% In-Browser Privacy

All tax calculations occur inside your client browser RAM. Zero commercial receipts or financial numbers leave your device.

How to Calculate Sales Tax in 3 Steps

Determine exact tax additions or extract pre-tax sums in seconds.

Select Mode & Currency

Choose "Add Tax" or "Reverse Tax", and pick your currency (USD, GBP, EUR, AUD, CAD).

Enter Amount & Tax Rate

Input your amount and enter the tax percentage (e.g., 20% UK VAT, 10% AUS GST, or custom).

View Itemized Breakdown

Inspect pre-tax net amount, calculated tax sum, and final gross total immediately.

Common Use Cases Across Global Markets

Practical tax accounting for cross-border businesses and shoppers.

US State & Local Sales Tax Billing

Compute checkout totals across varying US state rates (e.g. 6% Florida, 7.25% California, 8.875% NYC combined).

UK HMRC VAT Compliance (20%)

Extract VAT components from business expense receipts for quarterly UK HMRC VAT returns and bookkeeping.

Australian GST Reporting (10%)

Calculate Business Activity Statement (BAS) goods and services tax obligations on commercial sales and invoices.

Canadian GST / HST Remittances

Accurately account for Canadian 5% federal GST or harmonized sales tax (HST 13% Ontario, 15% Atlantic provinces).

Frequently Asked Questions

Key information regarding sales tax, VAT, and GST calculations.

Reverse tax extraction determines the original pre-tax amount from a total gross receipt that already includes tax. The formula is Net Amount = Gross Total / (1 + Tax Rate). For example, $120 gross with 20% VAT yields $100 net and $20 tax.

United Kingdom standard VAT is 20%; Australia GST is 10%; Canada charges 5% federal GST plus provincial rates (totaling 5% to 15% HST); United States state and local sales taxes vary by jurisdiction between 0% and 10.25%.

Yes. You can switch between USD ($), GBP (£), EUR (€), AUD (A$), and CAD (C$). Both the input labels and itemized summary result cards format with your chosen currency.

Yes. All tax arithmetic is performed locally in your client web browser. Zero financial values or invoice amounts are ever stored or uploaded to remote cloud servers.

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