GST Calculator
Add GST to a price or work out how much GST is inside one. Choose Australia, New Zealand, Canada (with HST by province) or India, and the right rates are filled in.
Built and checked by Saurabh Pandey · page updated
Calculator
Fee breakdown
Enter an amount.
How to use the GST Calculator
- Choose the country. Australia uses 10%, New Zealand 15%, Canada 5% GST or 13–15% HST depending on the province, and India has several slabs.
- Choose "Add GST" if your amount excludes GST, or "Remove GST" if it already includes it.
- Enter the amount and pick the rate. The GST-exclusive amount, the GST and the total appear instantly.
How it is calculated
Add GST: GST = price × rate ÷ 100 total = price + GST Remove GST: price = total ÷ (1 + rate ÷ 100) GST = total − price Australia 10%: GST inside a total = total ÷ 11 New Zealand 15%: GST inside a total = total × 3 ÷ 23
In Canada, provinces that have not joined the HST charge their own provincial sales tax (PST or QST) separately from the 5% GST. This calculator handles GST and HST; add PST or QST separately if it applies to you.
Worked examples
Australia: GST inside an A$110 price
A$110 ÷ 11 = A$10 GST.
| Amount before GST | A$100.00 |
| GST at 10% | A$10.00 |
| Amount including GST | A$110.00 |
Australia: add GST to an A$250 quote
| Amount before GST | A$250.00 |
| GST at 10% | A$25.00 |
| Amount including GST | A$275.00 |
New Zealand: GST inside NZ$230
NZ$230 × 3 ÷ 23 = NZ$30 GST.
| Amount before GST | NZ$200.00 |
| GST at 15% | NZ$30.00 |
| Amount including GST | NZ$230.00 |
Canada: add HST to C$100 in Ontario
Ontario HST is 13%.
| Amount before GST/HST | C$100.00 |
| GST/HST at 13% | C$13.00 |
| Amount including GST/HST | C$113.00 |
Canada: add HST to C$100 in Nova Scotia
Nova Scotia's HST fell from 15% to 14% on 1 April 2025.
| Amount before GST/HST | C$100.00 |
| GST/HST at 14% | C$14.00 |
| Amount including GST/HST | C$114.00 |
India: remove 18% GST from ₹1,180
₹1,180 ÷ 1.18 = ₹1,000 before GST.
| Amount before GST | ₹1,000.00 |
| GST at 18% | ₹180.00 |
| Amount including GST | ₹1,180.00 |
India: add 5% GST to ₹2,400
| Amount before GST | ₹2,400.00 |
| GST at 5% | ₹120.00 |
| Amount including GST | ₹2,520.00 |
Rates used by this calculator
| Country | Rate | % |
|---|---|---|
| Australia | GST | 10% |
| Australia | GST-free | 0% |
| New Zealand | GST | 15% |
| New Zealand | Zero-rated | 0% |
| Canada | GST only: AB, BC, MB, QC, SK, NT, NU, YT | 5% |
| Canada | HST: Ontario | 13% |
| Canada | HST: Nova Scotia | 14% |
| Canada | HST: New Brunswick, Newfoundland and Labrador, PEI | 15% |
| India | 18% (standard rate) | 18% |
| India | 5% (merit rate) | 5% |
| India | 40% (luxury & sin goods) | 40% |
| India | 3% (gold, silver, jewellery) | 3% |
| India | Nil / exempt | 0% |
Provincial sales taxes (PST in BC, SK, MB and QST in Quebec) are separate from GST and are not included here. Rates after the GST 2.0 reform effective 22 September 2025 (the 12% and 28% slabs were removed).
Last verified: . Official sources: ATO: How GST works · Inland Revenue: GST · Canada Revenue Agency: GST/HST rates · CBIC: GST rates
India's GST slabs after GST 2.0
From 22 September 2025 India moved to two main GST rates, 5% and 18%, with a 40% rate for luxury and "sin" goods and 0% for exempt essentials. The old 12% and 28% slabs were removed, and special rates such as 3% on gold, silver and jewellery continue. Always check the rate for your product's HSN code. To see what GST does to your profit, use the GST profit calculator.
GST on marketplace and platform fees
Etsy adds GST to its fees for Australian and Indian shops that have not given it a GST number, and Indian marketplaces charge 18% GST on their commission. The Etsy and marketplace fee calculators include this.
Frequently asked questions
How do I calculate GST in Australia?
Multiply the GST-exclusive price by 1.1 to add GST. To find the GST inside a GST-inclusive price, divide the price by 11: A$110 ÷ 11 = A$10 GST.
What is the GST rate in New Zealand?
15%. To find the GST in a GST-inclusive price, multiply it by 3 and divide by 23.
What is the GST/HST rate in each Canadian province?
5% GST in Alberta, British Columbia, Manitoba, Quebec, Saskatchewan and the territories; 13% HST in Ontario; 14% HST in Nova Scotia (from 1 April 2025); 15% HST in New Brunswick, Newfoundland and Labrador and Prince Edward Island.
What are the GST rates in India in 2026?
The main rates are 5% and 18%, with 40% on luxury and sin goods, 0% on exempt items, and special rates such as 3% on gold and jewellery. The 12% and 28% slabs were removed on 22 September 2025.
How do I calculate reverse GST?
Divide the GST-inclusive amount by (1 + rate ÷ 100). For 18% GST: ₹1,180 ÷ 1.18 = ₹1,000, so the GST is ₹180.