GST Calculator India

Calculate GST in one tap — no internet, no login, no sign-up.

GST Calculator India splits any amount into CGST, SGST and IGST instantly. Enter a figure, pick a rate, and read the breakdown. That's it.

THE CURRENT GST SLABS
The app always works on the slabs in force today: 0%, 0.25%, 3%, 5%, 18% and 40%. The 12% and 28% slabs were withdrawn in September 2025, so they sit under a clearly labelled section instead — still there when you need to reconcile an older invoice, never in the way when you don't.

Official rate source: https://cbic-gst.gov.in/gst-goods-services-rates.html (CBIC)

WHAT IT DOES
• Enter an amount excluding GST and add tax on top
• Or enter a price including GST and take the tax back out
• CGST + SGST for supplies within your state
• IGST for supplies to another state
• Copy or share the full breakdown in one tap
• Save calculations and find them again in History, with search and filters

WORKS 100% OFFLINE
Every calculation runs on your phone. There is no server, no account, and nothing to load. It works on a train, in a basement, or with mobile data switched off.

BUILT TO BE FAST
The keyboard opens on the amount the moment you launch the app, and the result updates as you type. There is no equals button to press.

YOUR DATA STAYS YOURS
Amounts and saved calculations are written to your device only. We never receive them — we don't operate a server that could. See our privacy policy for exactly what the advertising SDK collects; we'd rather be precise than claim "zero data" while an ad banner is on screen.

HONEST ABOUT ADS
One small banner at the bottom. No full-screen ads, no video, nothing that interrupts you.

BUILT FOR INDIAN BUSINESSES
Rupee formatting with proper Indian digit grouping (₹12,34,567.89), the notified GST slabs, and a layout that works one-handed on a phone.

NOT A GOVERNMENT APP
This is an independent tool. It is not affiliated with the Government of India, the GST Council, CBIC or GSTN, and it cannot file returns for you. Always confirm the applicable rate for your goods or services before filing.

Questions or bugs: [email protected]