GST Calculator Online
Use this free online GST Calculator tool to quickly calculate goods and services tax breakdowns client-side.
How it works & FAQ
Why this is secure?
All GST calculations run in your browser. Your financial values are never transmitted to any server.
Step-by-Step Guide
- 1Enter the amount you want to calculate GST for.
- 2Select whether the amount is exclusive (GST to be added) or inclusive (GST already included).
- 3Choose the GST rate (5%, 12%, 18%, or 28%) — the CGST, SGST, and IGST breakdown is shown instantly.
Frequently Asked Questions (FAQ)
What's the difference between CGST, SGST, and IGST?
For intra-state transactions, GST is split equally into CGST (Central) and SGST (State). For inter-state transactions, IGST (Integrated) applies at the full GST rate.
How is GST calculated on an inclusive amount?
GST amount = Original Amount × Rate / (100 + Rate). The base price is the original amount minus the GST amount.
Which GST rate should I use?
5% for essential goods and food. 12% for processed foods and computers. 18% for most services and electronics. 28% for luxury goods, automobiles, and tobacco.
All calculations are performed locally in your browser. No financial data is transmitted.