GST Calculator
Calculate GST, tax amounts, and final prices quickly and accurately.
All calculations happen in your browser — nothing you enter is sent anywhere.
Results
About this tool
A general-purpose GST/VAT calculator. Add GST to a pre-tax amount to get the final price, or remove GST from a GST-inclusive amount to see the pre-tax price and the tax component — with common rate presets or any custom rate.
How to use it
- Choose "Add GST" or "Remove GST".
- Enter the amount and GST rate (pick a preset or type your own).
- Read the breakdown: pre-GST amount, GST amount, and final amount.
FAQ
What GST rate should I use?
This is a general-purpose GST/VAT calculator — it doesn’t assume any one country’s tax regime. Use the official GST/VAT rate that applies in your jurisdiction and for your type of goods or service.
How do I add GST to a price?
GST Amount = Amount × (GST Rate ÷ 100). Final Amount = Amount + GST Amount. Select "Add GST" and enter the pre-tax amount.
How do I remove GST from a GST-inclusive price?
Select "Remove GST" and enter the GST-inclusive (final) amount — the calculator works out the original pre-GST amount and the GST component.
Is this calculator specific to any country?
No — it’s a general-purpose calculator for any GST or VAT system. Enter whichever rate applies to you.
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Goeroe Digital builds custom calculators, generators, and business tools on request.
Request a Custom ToolThis is a free tool provided by Goeroe Digital. All results, generated files, and figures are estimates or drafts for general informational use only. Goeroe Digital accepts no responsibility or liability for any output, outcome, loss, or decision arising from the use of these free tools — always review the results yourself before relying on them.