Is GST Calculator free to use?

Yes. GST Calculator is completely free, needs no login and has no usage limits.

Are my files safe with GST Calculator?

Yes. GST Calculator runs inside your browser, so nothing is uploaded to a server or stored anywhere.

Does GST Calculator work on mobile?

Yes. GST Calculator works on Android and iPhone browsers as well as on desktop, with touch-friendly controls.

GST Calculator

Work out CGST, SGST and the final invoice amount.

Enter your numbers

Enter the base amount and the GST rate that applies.

Amount (₹)

GST rate %18 %

Result

GST amount

₹1,800

CGST (half)

₹900

SGST (half)

₹900

Total with GST

₹11,800

Reverse: amount inside

₹8,474.58

About GST Calculator

GST Calculator is a free, browser-based tool from SmartTools. Work out CGST, SGST and the final invoice amount. Everything runs on your own device — your files and text never leave your phone or computer, nothing is uploaded to a server, and no account or login is needed. Open the page, use the tool, download or copy your result, and you are done.

How to use

Open the GST Calculator workspace at the top of this page.
Add your input — pick a file, type or paste your text, or move the controls.
The result updates instantly in your browser as you work.
Download, copy or save the result. Nothing is stored after you close the tab.

Frequently asked questions

Is GST Calculator free to use?: Yes. GST Calculator is completely free, needs no login and has no usage limits.
Are my files safe with GST Calculator?: Yes. GST Calculator runs inside your browser, so nothing is uploaded to a server or stored anywhere.
Does GST Calculator work on mobile?: Yes. GST Calculator works on Android and iPhone browsers as well as on desktop, with touch-friendly controls.

Privacy & terms

GST Calculator works entirely inside your browser using client-side code. We do not upload, copy, store or share your files, text or results, and we keep no logs of what you process here. Because processing happens on your device, results depend on your browser and device capability, and the tool is provided as-is without warranty for critical, legal or financial use — please check important output yourself. Some tools that need live data (currency rates, translation, network checks) send only the minimum request needed to a public third-party service. Use SmartTools only with content you own or have permission to edit. Questions or takedown requests: bahaigamarbhola@gmail.com.