This free GST calculator helps you add tax to a net price or remove tax from a total price. You can treat it as a simple tax calculator, sales tax calculator, or VAT calculator for your country rate.
Enter the amount, choose your tax rate, and pick whether the price is before or after GST. The tool shows the GST amount, the net price, and the total price in one view.
This GST calculator gives a fast guide only. Use it with your accounting software or official tax calculator if you need exact cents for invoices or returns.
The tax calculator uses a simple percentage formula. For the add mode it multiplies the net price by the GST rate, then adds that figure back to show the total price.
For the remove mode, the GST calculator divides the total price by one plus the rate. This gives a net amount and a separate GST figure, which works well for receipts that only list a total.
Store owners use the tool as a quick sales tax calculator when they need to quote both display prices and tax-only values. Freelancers and small businesses use the same GST calculator to check invoices before sending them.
You can also use this page as a lightweight VAT calculator on export jobs or digital services. Change the rate field to match the correct VAT percentage and the maths stays the same.
Yes, the GST calculator works with any rate because you type the percentage by hand. You can treat it as a local tax calculator, sales tax calculator, or VAT calculator just by changing the rate.
A GST inclusive price already has tax inside the figure you see. A GST exclusive price shows only the net amount, so the tax is added later at checkout or on the invoice.
You can use the same tax calculator for VAT by entering the correct VAT rate. The formula for adding and removing tax is the same for GST, VAT, and most sales tax systems.
This page works well for quick checks and quote prep. For full accounts, always pair the GST calculator with bookkeeping software, an accountant, or the official forms in your country.
