GST Calculator — Free Online Tool
GST Calculator is a free online tool that works out tax on any amount — both adding GST to a price and stripping it back out again. It supports GST and VAT rates for India, the UK, Australia, Canada, New Zealand, Singapore and the UAE, or any custom rate you type. Everything is calculated in your browser, so nothing you enter is sent anywhere.
🚀 Try GST Calculator now
Free · No signup · Runs in your browser · Instant results
Open GST Calculator →📌 What is GST Calculator?
A GST calculator answers two everyday questions: what does this cost once tax is added, and how much of this price was tax in the first place. The second one — reverse GST — is the harder of the two to do in your head, and it is where most manual errors creep in. This tool handles both, and can split Indian GST into CGST and SGST when the sale is within one state.
🚀 How to use GST Calculator
- Open the GST Calculator using the button below
- Choose whether you are adding tax to a price or removing tax from a tax-inclusive price
- Enter the amount and pick a rate preset, or type your own rate
- Read the result — the amount before tax, the tax itself, and the total are all shown at once
✨ Features and benefits
- 100% free — no registration or signup required
- Calculated in your browser — the numbers you enter are never uploaded
- Instant results — figures update as you type, with no button to press
- Works on all devices — mobile, tablet and desktop
- Nothing to install — runs directly in your browser