GST Calculator

Add or remove GST, with CGST/SGST split.

1,000
Net (excl. GST)
180
GST Amount
1,180
Gross (incl. GST)
90
CGST (9%)
90
SGST (9%)

Free online GST calculator. Add GST to a net amount or remove GST from a gross amount at any rate, with an optional CGST and SGST split for Indian GST. Instant and private.

How to use the GST Calculator

  1. 01Choose to add GST to a net amount or remove GST from a gross amount.
  2. 02Enter the amount and the GST rate.
  3. 03Optionally split the GST into equal CGST and SGST halves.

Frequently asked questions

What are CGST and SGST?

Under Indian GST, tax on an intra-state sale is split equally into Central GST (CGST) and State GST (SGST). An 18% GST becomes 9% CGST plus 9% SGST, which this calculator shows when the split is enabled.

How do I remove GST from an inclusive price?

Divide the gross amount by 1 plus the GST rate as a decimal; the difference is the GST. Use the Remove GST mode to do this automatically.