GST Calculator
Goods and services tax, or GST, is added to many prices. Use this to add it to a price, or to find the tax inside a total that already includes it. You type in the rate, because it can change and differs by place.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
To add GST, multiply the price by the rate and add the result. To take GST out of a total, divide the total by one plus the rate, then subtract that from the total.
Some places add more than one tax, such as a federal and a provincial tax. Add the rates together, or work out each one separately.
Worked example
With $100.00 and a rate of 5%, you get $100.00 before tax, $5.00 of GST, and a total of $105.00.
Questions
Where do I find the rate?
Your tax authority publishes the current rate, and receipts often show it. Type in the rate that applies to your sale.
Is GST charged on GST?
No. The tax is worked out on the price before tax, so it is not taxed again.
Can I handle items with no tax?
Not separately. For an item with no tax, enter its price with the rate set to zero, or leave it out of the total.
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