GST Calculator
Add or see GST on a price.
Enter the values and press Calculate.
How to use GST Calculator
GST is a percentage added to a net price. This tool shows the tax and the total including it.
Open GST Calculator on toolpermarket. It runs entirely in your browser, so you can start without creating an account.
Enter the net price and the GST rate in the fields above, then press Calculate.
Read the result below the form. Change any input and run it again as many times as you like — the math is instant and local.
Worked example. A $100 item with 10 percent GST costs $110, with $10 of tax.
When to use GST Calculator. Use it when pricing products or checking a quoted total that should include tax.
Frequently asked questions
Is GST Calculator free to use?
Yes. GST Calculator runs entirely in your browser. There is no account, no upload, and no cost.
Does GST Calculator work on mobile?
Yes. The layout is responsive, so GST Calculator works on any phone, tablet, or desktop with a modern browser.
Is the entered price net or total?
Enter the net price before tax. The tool adds the GST on top to give the total.
What if the rate is zero?
At 0 percent the tax is zero and the total equals the net price.