GST Calculator
Add or remove GST at 5%, 12%, 18%, 28% or any rate, with CGST/SGST and IGST split.
How to use GST Calculator
- 1Enter your values — results update instantly as you type.
- 2Adjust any setting to compare options.
- 3Copy or download the result. Nothing is sent to a server.
About this tool
Add or remove GST at 5%, 12%, 18%, 28% or any rate, with CGST/SGST and IGST split. It works instantly in your browser with nothing to install. It's part of our free calculators, which work together — you can pass the result straight into related tools below.
Frequently asked questions
Is GST Calculator free?
Yes. There's no sign-up, no watermark and no usage limit.
Is my data stored?
No. Everything is calculated in your browser and nothing is sent to a server.
Does it work on mobile and offline?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.