GST Calculator
GST amount and total price from an amount and GST rate.
About the GST Calculator
The GST Calculator gives you an instant answer from just a few inputs — amount (excl. gst), gst rate. It runs entirely in your browser, so the numbers you enter stay private and never touch a server, and the result recalculates the moment you change a value. It's free to use with no sign-up, no limits, and nothing to install.
Worth Knowing
Goods and Services Tax works like VAT — a percentage added to the sale price — and is used in countries including Australia, India, Canada, and New Zealand, though rates and structures differ. India notably uses multiple GST slabs for different goods, while Australia applies a flat 10%. As with VAT, the important distinction is whether you're adding GST to a base amount or backing it out of a tax-inclusive total, since reversing the calculation isn't simply subtracting the percentage.
How to Use
- Enter Amount (excl. GST) into the first field of the GST Calculator.
- Fill in the rest: GST rate.
- Your result appears instantly as you type — there's no submit button or page reload.