GST Calculator
Add or remove goods and services tax at the official rate for Australia, New Zealand, Singapore, India, Canada by province, the UK — or type your own rate.
GST Calculator: with the default inputs, tax amount is 10.
In whatever currency the jurisdiction uses — the arithmetic is the same and nothing is converted.
Each rate comes from that government's own page, linked with the results.
In the currency you entered.
- Price excluding tax
- 100
- Price including tax
- 110
- Rate applied
- 10%
- Made up of
- GST 10%
- Tax fraction of the gross price
- 1 ÷ 11 of the tax-inclusive priceThe shortcut for pulling tax out of a tax-inclusive price.
- Tax as a share of the gross price
- 9.09%
Assumptions
- Rates verified 9 September 2026 from each government's own page: Australia 10% (business.gov.au), New Zealand 15% (Inland Revenue), Singapore 9% (IRAS), Canada GST/HST and provincial rates (CRA, plus BC, Saskatchewan, Manitoba and Revenu Québec), UK 20%/5% (gov.uk), Malaysia SST (Royal Malaysian Customs).
- India's 5% / 18% / 40% structure is as recommended by the 56th GST Council and effective 22 September 2025; the current slab for a specific HSN or SAC code should be confirmed before use, and some tobacco products remained on the previous rates pending a separate transition date.
- Australia's rate was taken from business.gov.au because ato.gov.au blocks automated requests; both are Australian Government sites.
- In the provinces with a separate PST, RST or QST the rates are simply added, which is correct arithmetic but assumes both taxes apply to the supply — their exemption lists differ.
- No currency conversion is performed. Amounts are in whatever currency you enter.
- Registration thresholds, place-of-supply rules, reverse charges, input tax credits, margin schemes and item-level exemptions are outside the scope of this calculator.
| Jurisdiction | Rate | Tax | Price including tax |
|---|---|---|---|
| Australia — GST 10% | 10% | 10 | 110 |
| New Zealand — GST 15% | 15% | 15 | 115 |
| Singapore — GST 9% | 9% | 9 | 109 |
| Canada — GST only 5% (AB, NT, NU, YT) | 5% | 5 | 105 |
| Canada — Ontario HST 13% | 13% | 13 | 113 |
| Canada — Nova Scotia HST 14% | 14% | 14 | 114 |
| Canada — New Brunswick HST 15% | 15% | 15 | 115 |
| Canada — Newfoundland & Labrador HST 15% | 15% | 15 | 115 |
| Canada — Prince Edward Island HST 15% | 15% | 15 | 115 |
| Canada — British Columbia GST 5% + PST 7% | 12% | 12 | 112 |
| Canada — Saskatchewan GST 5% + PST 6% | 11% | 11 | 111 |
| Canada — Manitoba GST 5% + RST 7% | 12% | 12 | 112 |
| Canada — Quebec GST 5% + QST 9.975% | 14.975% | 14.98 | 114.98 |
| India — GST 5% (merit rate) | 5% | 5 | 105 |
| India — GST 18% (standard rate) | 18% | 18 | 118 |
| India — GST 40% (de-merit rate) | 40% | 40 | 140 |
| United Kingdom — VAT 20% (standard) | 20% | 20 | 120 |
| United Kingdom — VAT 5% (reduced) | 5% | 5 | 105 |
| Malaysia — service tax 8% | 8% | 8 | 108 |
| Malaysia — sales tax 10% | 10% | 10 | 110 |
Applied to your tax-exclusive amount, so the rows are directly comparable.
How this is worked out
The formula
Adding tax: tax = net price × rate
gross price = net price × (1 + rate)
Removing tax: net price = gross price ÷ (1 + rate)
tax = gross price − net price
The tax fraction of a tax-inclusive price is rate ÷ (1 + rate):
10% → 1/11 of the gross 15% → 3/23 20% → 1/6
Rates used (all verified 9 September 2026):
Australia GST 10% · New Zealand GST 15% · Singapore GST 9% · UK VAT 20% (5% reduced)
Canada GST 5%; HST 13% Ontario, 14% Nova Scotia, 15% New Brunswick / Newfoundland and
Labrador / Prince Edward Island; GST + PST 12% British Columbia, 11% Saskatchewan,
12% Manitoba, 14.975% Quebec
India 5% merit / 18% standard / 40% de-merit
Malaysia service tax 8%, sales tax 10%Open How it’s calculated above to see this worked through with your own numbers.
What you enter
- What do you want to do?
- Choose one of 2 options.Add GST — I have the price before tax · Remove GST — I have the price including tax
- Amount
- In whatever currency the jurisdiction uses — the arithmetic is the same and nothing is converted.in dollars · 0 or more · defaults to 100
- Where
- Each rate comes from that government's own page, linked with the results.Australia — GST 10% · New Zealand — GST 15% · Singapore — GST 9% · Canada — GST only 5% (AB, NT, NU, YT) · Canada — Ontario HST 13% · Canada — Nova Scotia HST 14% · Canada — New Brunswick HST 15% · Canada — Newfoundland & Labrador HST 15% · Canada — Prince Edward Island HST 15% · Canada — British Columbia GST 5% + PST 7% · Canada — Saskatchewan GST 5% + PST 6% · Canada — Manitoba GST 5% + RST 7% · Canada — Quebec GST 5% + QST 9.975% · India — GST 5% (merit rate) · India — GST 18% (standard rate) · India — GST 40% (de-merit rate) · United Kingdom — VAT 20% (standard) · United Kingdom — VAT 5% (reduced) · Malaysia — service tax 8% · Malaysia — sales tax 10% · Somewhere else — I'll type the rate
- Your own rate(under More options)
- Used only when “Somewhere else” is selected above.a percentage · from 0 to 100 · defaults to 10
What you get back
- Tax amountmain answer
- In the currency you entered.
- Price excluding tax
- Price including tax
- Rate applied
- Made up of
- Tax fraction of the gross price
- The shortcut for pulling tax out of a tax-inclusive price.
- Tax as a share of the gross price
What this assumes
- Rates verified 9 September 2026 from each government's own page: Australia 10% (business.gov.au), New Zealand 15% (Inland Revenue), Singapore 9% (IRAS), Canada GST/HST and provincial rates (CRA, plus BC, Saskatchewan, Manitoba and Revenu Québec), UK 20%/5% (gov.uk), Malaysia SST (Royal Malaysian Customs).
- India's 5% / 18% / 40% structure is as recommended by the 56th GST Council and effective 22 September 2025; the current slab for a specific HSN or SAC code should be confirmed before use, and some tobacco products remained on the previous rates pending a separate transition date.
- Australia's rate was taken from business.gov.au because ato.gov.au blocks automated requests; both are Australian Government sites.
- In the provinces with a separate PST, RST or QST the rates are simply added, which is correct arithmetic but assumes both taxes apply to the supply — their exemption lists differ.
- No currency conversion is performed. Amounts are in whatever currency you enter.
- Registration thresholds, place-of-supply rules, reverse charges, input tax credits, margin schemes and item-level exemptions are outside the scope of this calculator.
About this calculator
Adding a goods and services tax is easy. Taking one off is where people go wrong, because removing 10% is not the same as taking 10% off. If a price includes 10% GST, the tax is one eleventh of it, not one tenth — on a $110 tax-inclusive price the GST is $10, not $11. This calculator does both directions and shows the arithmetic.
Pick the jurisdiction, not just the number
Every rate on this page comes from that government's own publication and is dated. The dropdown covers the systems most people search for:
- Australia — GST 10%, flat across the country.
- New Zealand — GST 15%, applied to almost everything with very few exemptions. One of the broadest-base GSTs in the world.
- Singapore — GST 9%, raised from 8% on 1 January 2024.
- Canada — the complicated one. A 5% federal GST everywhere; five provinces fold it into a single HST (13% in Ontario, 14% in Nova Scotia since April 2025, 15% in the Atlantic three); British Columbia, Saskatchewan and Manitoba charge a separate provincial sales tax on top; Quebec charges QST at 9.975% on the price excluding GST, so the two simply add rather than compound.
- India — the 56th GST Council collapsed four slabs into a 5% merit rate, an 18% standard rate and a 40% de-merit rate, effective 22 September 2025, with a nil rate still applying to some supplies. Which slab applies depends on the HSN or SAC code of what you are selling, so check the code before you invoice.
- United Kingdom — VAT at 20% standard, 5% reduced.
- Malaysia — not a GST at all since 2018 but a two-part SST: service tax at 8% (6% for food and beverage, parking, logistics and telecoms) and sales tax at 5% or 10% depending on the goods.
If your jurisdiction is not listed, choose Somewhere else and type the rate under More options. The results panel will tell you plainly that the figure is yours and not sourced.
Zero-rated is not the same as exempt
Both mean no tax on the sale, and for a consumer they look identical. For a registered business they are opposite: a zero-rated supply still lets you reclaim the tax on your inputs, while an exempt supply does not, so exempt sellers absorb the tax in their costs. Basic groceries, exports and (in most systems) medical supplies are usually zero-rated; financial services and residential rent are usually exempt.
Where this stops
It is a rate calculator, not a compliance tool. It does not know registration thresholds, place-of-supply rules for cross-border digital services, reverse charges, margin schemes, input tax credits, or which of your particular goods falls into which slab or exemption. Canada's provincial sales taxes in particular have exemption lists quite different from the federal GST's, so the combined rate only applies where both taxes actually do.
Frequently asked questions
▸How do I remove GST from a price?
Divide by 1 plus the rate, then subtract. At 10%, divide the tax-inclusive price by 1.1; the tax is one eleventh of the gross. At 15% the tax is 3/23 of the gross, and at 20% VAT it is one sixth. Subtracting the rate from the gross price gives the wrong answer.
▸What is the GST rate in Australia?
10%, and it has been 10% since GST was introduced in July 2000. Basic food, most health and medical supplies, and education are GST-free.
▸What are India's GST slabs now?
The 56th GST Council replaced the old four-slab structure with a 5% merit rate and an 18% standard rate, plus a 40% de-merit rate for a short list of goods and services, effective 22 September 2025. A nil rate still applies to some supplies, and certain tobacco products stayed on the previous rates pending a separate transition.
▸Why is Canada's rate different in every province?
The 5% federal GST applies everywhere. Five provinces harmonised their sales tax with it into a single HST, three run a separate provincial sales tax alongside, Quebec runs QST, and Alberta and the territories charge nothing on top. Nova Scotia's HST fell from 15% to 14% on 1 April 2025.
▸What is the difference between zero-rated and exempt?
Neither charges tax to the customer, but a business making zero-rated supplies can still reclaim the tax on its own purchases, while a business making exempt supplies cannot. That difference is invisible to a consumer and matters a great deal to a seller.
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