India GST Calculator
Add GST to a base price, or work out the GST already included in a price — with the CGST + SGST or IGST split.
- Free, updates instantly as you type
- Standard 5/12/18/28% slabs, or a custom rate
GST slabs and rules can change — check the official GST portal for the current rate on your specific goods or services before filing or invoicing.
Frequently asked questions
What's the difference between CGST, SGST, and IGST?
For sales within the same state, GST splits evenly into CGST (to the central government) and SGST (to the state government) — each half the total rate. For sales between states, the full amount is charged as IGST instead.
How do I remove GST from a total price?
Switch to "Remove GST" and enter the GST-inclusive total. The calculator divides by (1 + rate/100) to find the base amount, then shows the GST portion separately.
Which GST slab applies to my product?
This calculator doesn't look up rates by product — you choose the slab. Check the official GST rate schedule for your specific goods or services, since rates vary and are periodically revised.