GST calculator (India)
Add GST to a price or take it out of a GST-inclusive price, with the CGST + SGST or IGST split.
Check the current rate for your HSN / SAC code on the GST portal.
Type of saleDo it automatically
GST on every bill, worked out for you
ZaleBee picks CGST + SGST or IGST from the place of supply, prints it on every invoice and prepares GSTR-1, GSTR-3B and e-invoice JSON from your sales.
Frequently asked questions
How do I calculate GST on a price?+
GST amount = price × rate ÷ 100. For example, ₹1,000 at 18% GST: GST is ₹180 and the total is ₹1,180.
How do I remove GST from an inclusive price?+
Price before GST = inclusive price × 100 ÷ (100 + rate). For example, ₹1,180 including 18% GST: price before GST is ₹1,000 and GST is ₹180.
When do I charge CGST + SGST and when IGST?+
For a sale within your state, the GST is split equally into CGST and SGST (or UTGST). For a sale to another state, the full rate is charged as IGST.
Which rate applies to my product?+
It depends on the HSN or SAC code. Rates were rationalised in September 2025; check the current rate for your code on the GST portal.
More free tools
Where should we send your copy?
Enter your email to download. We’ll also send a few tips to save time on gst calculators; unsubscribe anytime.