Gst Calculator
Add GST to a price or remove GST from a GST inclusive amount, at any rate. No signup. Ideal for businesses, invoices and working out inclusive and exclusive prices.
Result
| Base amount | ||
|---|---|---|
| Total GST | ||
| CGST (half) | ||
| SGST (half) | ||
| Total (incl. GST) |
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This GST calculator adds GST to a price or removes it from a GST inclusive amount, at any rate you set, directly in your browser. Enter an amount and the rate to see the GST and the inclusive or exclusive price. No account, no install, so businesses and individuals can work out GST correctly on any device in seconds.
How to Calculate GST Step by Step
- Enter your amount. Type the amount into the input. It can be a price before GST, if you want to add GST, or a GST inclusive total, if you want to remove GST.
- Set the GST rate. Enter the GST rate that applies, which varies by country. The calculator uses this percentage to work out the GST portion.
- Choose add or remove. Select whether to add GST to an exclusive amount, or remove GST from an inclusive amount, depending on what you have and what you need.
- Read the results. The calculator shows the GST amount and the resulting price, either the inclusive total after adding, or the exclusive price after removing.
- Use the figures. Apply the GST amount and prices to your invoice, quote, pricing, or record, knowing the inclusive and exclusive amounts are correct.
What GST Is and How It Works
GST, meaning goods and services tax, is a value added tax applied to most goods and services in many countries around the world, including Australia, India, Canada, New Zealand and Singapore, among others. It is a consumption tax, ultimately paid by the end consumer, but collected and remitted by businesses at each stage of the supply chain. The exact rate and rules vary considerably by country, so the applicable rate depends on where you are.
The two core GST calculations are adding it and removing it, which are different operations. Adding GST takes a price that excludes GST and adds the tax to reach the GST inclusive total, which is what a customer pays. Removing GST takes a GST inclusive amount and works backward to find the original price before GST and the GST portion within it. Businesses need both: adding when pricing, and removing when working out the tax within a total.
Removing GST is where people most often make mistakes, because it is not simply subtracting the percentage. If GST was added at a certain rate, you cannot remove it by subtracting that same percentage of the inclusive total, since the GST was calculated on the smaller exclusive amount, not the inclusive one. The correct back calculation divides appropriately to recover the original price. Getting this wrong is a common error that a calculator prevents.
GST calculations are essential for businesses that must charge, record and remit the tax correctly. Pricing goods and services, issuing compliant invoices showing the GST, and working out the GST within amounts received all depend on accurate GST figures. For consumers and others, understanding how much GST is in a price, or what a price would be without it, is also useful. Because the rate varies by country and the back calculation is tricky, a calculator ensures accuracy.
Adding GST Versus Removing GST
| Operation | Start with | Gives you |
|---|---|---|
| Add GST | Price before GST | GST amount and inclusive total |
| Remove GST | GST inclusive total | Original price and GST portion |
| The rate | Varies by country | Set it to your local rate |
| Common error | Subtracting the percentage to remove | Use the correct back calculation |
Who Uses a GST Calculator
Pro Tips for Accurate GST Calculations
Common GST Mistakes to Avoid
Related Tools You May Need Next
For value added tax under its VAT name, our VAT Calculator works the same way. For general percentage maths, the Percentage of a Number calculator helps, and the Discount Calculator applies discounts.
Frequently Asked Questions
How do I calculate GST?
Enter your amount and the GST rate that applies in your country, then choose to add or remove GST. To add, the calculator takes a price before GST and adds the tax to give the inclusive total. To remove, it takes a GST inclusive amount and works backward to find the original price and the GST portion within it. It shows the GST amount and the resulting prices, giving you accurate figures for pricing, invoicing or accounting.
What is GST?
GST, meaning goods and services tax, is a value added tax applied to most goods and services in many countries, including Australia, India, Canada, New Zealand and Singapore, among others. It is a consumption tax ultimately paid by the end consumer but collected and remitted by businesses at each stage of the supply chain. The exact rate and rules vary considerably by country, so the applicable rate depends on where you are located and what you are supplying.
How do I remove GST from a total?
To remove GST, enter the GST inclusive total and the GST rate, and choose the remove option. The calculator works backward to find the original price before GST and the GST portion within the total. Importantly, you cannot remove GST simply by subtracting the rate percentage from the inclusive total, because the GST was calculated on the smaller exclusive amount, not the inclusive one. The correct back calculation divides appropriately, which the calculator does for you, avoiding a common error.
Why can't I remove GST by subtracting the percentage?
Because the GST was originally calculated on the exclusive amount, which is smaller than the inclusive total. If you subtract the rate percentage of the inclusive total, you subtract too much, since that percentage of the larger inclusive amount is more than the actual GST. The correct method divides the inclusive total appropriately to recover the original exclusive price, and the difference is the GST. This is why a calculator is helpful, as the back calculation is not the simple subtraction people expect.
What GST rate should I use?
You should use the GST rate that applies in your country, since rates vary considerably between the different countries that levy GST. There is no single universal GST rate. Set the calculator to your local rate to ensure the figures are correct for your jurisdiction. If you are unsure of the current rate or which rate applies to particular goods or services, confirm it for your situation, as some jurisdictions have different rates for different categories of goods and services.
What is the difference between GST inclusive and exclusive?
A GST exclusive amount is the price before GST is added, while a GST inclusive amount is the total after GST has been added, which is what a customer actually pays. When you add GST, you go from exclusive to inclusive; when you remove GST, you go from inclusive back to exclusive. Knowing which one your amount is before calculating is essential, since it determines whether you need to add or remove the GST to get the figures you want.
Is GST the same as VAT?
GST and VAT are both value added taxes that work on the same principle, a tax on goods and services collected at each stage of the supply chain and ultimately paid by the consumer. Different countries use different names: some call it GST, goods and services tax, while others call it VAT, value added tax. The calculations are essentially the same. So a GST calculator and a VAT calculator perform the same kind of add and remove operations, just under the different names used in different countries.
Is the GST calculator free?
Yes, it is completely free with no account and no usage limit. You can add and remove GST on as many amounts as you like, at any rate, as often as you like, at no cost. It runs entirely in your browser on any device, so there is nothing to download or install, and the GST amount and inclusive or exclusive prices appear instantly whenever you enter an amount and rate.