What is a GST Calculator?
A GST Calculator adds GST to a price or removes it from a GST-inclusive price. It shows the base amount, the GST, its CGST and SGST halves and the total.
GST is charged on most goods and services in India at rates set by the GST Council. For sales within a state, GST is split equally into CGST and SGST. For sales between states, the full amount is IGST.
How to use the GST Calculator
- Enter amount.
- Enter GST rate.
- Select amount type.
- Tap Calculate to see the result.
- Tap Reset to clear the fields and try again.
Who should use it
- Shop owners and freelancers preparing invoices
- Buyers checking how much GST is in a price
- Accountants doing quick checks
Key terms
- GST rate
- The percentage charged on the item or service.
- Excluding GST
- A price before tax is added.
- Including GST
- A price that already contains the tax.
- CGST and SGST
- The central and state halves of GST on sales within a state.
Frequently asked questions
How do I remove GST from a price?
Choose “Including GST” and enter the price. The calculator works out the base price and the tax inside it.
What are the current GST rates?
Rates depend on the item. Check the GST Council or CBIC website for the latest rate list.
When is IGST charged?
On sales between two different states or union territories.
Is my data stored?
No. Everything runs in your browser.
Last updated: 1 November 2026