GST Calculator
Add GST to an amount, or work backwards from a GST-inclusive price to find the base value.
Total with GST₹1,180.00
- Base amount
- ₹1,000.00
- GST at 18%
- ₹180.00
- CGST
- ₹90.00
- SGST
- ₹90.00
- Total
- ₹1,180.00
CGST and SGST apply to supply within a state, each taking half the tax. For supply between states the same total is charged as IGST instead.
How to use it
- Enter the amount.
- Enter the GST rate — commonly 5%, 12%, 18% or 28%.
- Say whether that amount already includes GST.
- The base, the tax and the CGST/SGST split are shown.
Questions
How do I remove GST from a total? Divide by 1 plus the rate, not by subtracting the rate. Taking 18% off ₹1,180 gives ₹967.60, but the correct base is ₹1,000. This is the mistake the calculator exists to prevent.
What are CGST and SGST? For a supply within a state the tax is split evenly between the central and state governments. An 18% rate is 9% CGST plus 9% SGST.
What about IGST? Supply between states is charged the same total as a single IGST amount instead of being split. The total tax is identical.