GST Calculator Online with CGST, SGST, and IGST Breakdown
Calculate GST online for India with CGST, SGST, and IGST breakdown. Add GST to base prices or remove GST from inclusive invoice amounts.
GST Calculator Online with CGST, SGST, and IGST Breakdown
All GST math runs instantly in your browser. No invoice data is uploaded.
Quick answer
A good GST calculator should show more than the final total. You also need the tax split: CGST + SGST for same-state sales or IGST for inter-state sales.
OneClickUse GST Calculator handles both exclusive and inclusive GST amounts, so you can add GST to a base price or remove GST from an invoice total.
Use it for quick estimates, invoice checks, and pricing sanity checks before final filing or accounting review.
How to calculate GST with tax split in 3 steps
Enter the amount
Type the base amount if GST is extra, or the invoice total if GST is already included.
Choose rate and mode
Pick 5%, 12%, 18%, or 28%, then choose add GST or remove GST.
Read CGST/SGST or IGST
Use CGST + SGST for intra-state invoices and IGST for inter-state invoices.
CGST, SGST, and IGST explained simply
For sales within the same state, GST is split equally into CGST and SGST. For sales across states, the same tax amount is shown as IGST.
The total tax does not change just because the split changes. What changes is how the tax is reported on the invoice.
Inclusive vs exclusive GST
Exclusive GST means tax is added on top of the base amount. Inclusive GST means the final amount already includes tax and you need to back-calculate the base price.
This distinction is the most common source of wrong invoice totals, especially when copying numbers from quotations or marketplaces.
A good GST calculator should show more than the final total. You also need the tax split: CGST + SGST for same-state sales or IGST for inter-state sales.
Before you start
Comparison table
What most guides miss
Most search results explain the button clicks but skip the final verification step. Open the output, check the details, and only then upload or share it.
Common mistakes to avoid
Helpful related tools and guides
FAQ
What is the formula to add GST?
GST amount = base amount x GST rate / 100. Total = base amount + GST amount.
How do I remove GST from an inclusive amount?
Base amount = inclusive amount / (1 + GST rate / 100).
When do I use CGST and SGST?
Use CGST and SGST for same-state sales where supplier and buyer are in the same state.
When do I use IGST?
Use IGST for inter-state sales where supplier and buyer are in different states.
Final take
For “GST calculator online with CGST, SGST, and IGST breakdown”, start with GST Calculator, follow the three-step workflow, and verify the result before uploading, sharing, or storing the output.