GST Calculator by Spolvero

GST Calculator by Spolvero: the GST number you need in one glance, and a GST bill PDF in 10 seconds.

Type an amount. Tap a rate. Read the answer. Add items, and send the bill.

A GST BILL AS A PDF IN 10 SECONDS
Add items with GT, tap CHK, tap Send as invoice. The app makes a PDF tax invoice — your business name and GSTIN, invoice number, CGST/SGST or IGST, total in words — and hands it to WhatsApp or any app you choose. Made on your phone, never uploaded. A simple GST bill maker and GST invoice maker for shops, freelancers and small businesses.

WHAT THE GST CALCULATOR DOES
• Add GST to a price, or pull it back out of a total (reverse GST)
• CGST SGST calculator: splits CGST + SGST within a state, IGST across state lines
• Every current slab — 0%, 5%, 18%, 40% — plus 3%, 0.25%, and the 1% and 6% composition rates
• Four rate keys you set once. A jeweller's pad opens on 3% and 0.25%
• Find a product's HSN/SAC code by name
• Memory keys, markup, and a running bill for multi-item totals
• Your last 20 calculations, one tap to bring any of them back

CURRENT ON GST 2.0
The September 2025 reform removed the 12% slab and added 40%. The app carries the new structure and shows you the date its rates came from, so you are never guessing whether the number in front of you is current.

WHERE THESE RATES COME FROM
GST rates are set by the GST Council and notified by the Central Board of Indirect Taxes and Customs. Check any rate against the official sources:

• CBIC official GST rate finder — https://cbic-gst.gov.in/gst-goods-services-rates.html
• GST Council — https://gstcouncil.gov.in
• GST portal — https://www.gst.gov.in

DISCLAIMER: This is an independent app. It is not affiliated with, endorsed by, or representing the Government of India, the GST Council, or the Central Board of Indirect Taxes and Customs. It does not provide or facilitate any government service. It calculates and informs; it does not file returns. Rates shown are reproduced from the official notifications above for convenience — always confirm a rate at the official source before it goes on an invoice.

NO ACCOUNT. NO PERMISSIONS.
It works the second it opens. No sign-up, no location prompt, no waiting on a network. Your calculations never leave your phone — there is no server to send them to.

NO ADS IN YOUR WAY
One small banner sits below the keypad, where it cannot come between you and your number. No ads between taps and no full-screen ad in the middle of a calculation. At most one short ad when you open the app, no more than once every four hours.

This app is not affiliated with, endorsed by, or representing the Government of India, the GST Council, or CBIC. Official rate sources: https://cbic-gst.gov.in/gst-goods-services-rates.html and https://gstcouncil.gov.in