GST / VAT Calculator
Add 10% GST to price or extract GST from inclusive total instantly.
Last reviewed by the myCalculator Editorial Team
Input Parameters
Calculation Results
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Formula & How GST / VAT Calculator Works
Australian GST is 10% of the price of most goods and services. To add GST to a GST-exclusive price, multiply by 1.1: $250 becomes $275, of which $25 is GST. To find the GST inside a GST-inclusive price, divide by 11: a $110 price contains $10 of GST and $100 before GST. Dividing by 1.1 gives the ex-GST amount, which is the same $100. Businesses registered for GST use these figures on tax invoices and the BAS. Some items, such as basic food and many health and education services, are GST-free, so check whether GST actually applies before you use the result.
- Enter Price Amount ($): Input your target parameter value.
- Enter Calculation Mode: Input your target parameter value.
- Apply Formula: Calculate using
GST = Total / 11 (or Net × 0.10). - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
How do I extract GST from a total receipt?
Divide the GST-inclusive total price by 11.
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Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Official 2026/2027 Individual Income Tax Brackets, Stage 3 tax cuts, PAYG withholding, BAS & GST schedules.
National portal for business registration, fair work compliance, employer super guarantee rates (11.5% - 12%).
Official financial guidance on personal taxation, superannuation compounding, and business cash flow.
Dedicated Australian home loans, borrowing capacity, mortgage repayments & refinance modeling.