GST Calculator Online
Add or remove GST instantly and see the full CGST, SGST, and IGST breakdown in Indian Rupees.
Instantly add or remove GST with an in-browser breakdown.
- Base Amount
- ₹0.00
- CGST (9%)
- ₹0.00
- SGST (9%)
- ₹0.00
- Total GST
- ₹0.00
- Total Amount
- ₹0.00
You are adding GST on top of the base amount.
This calculator is for reference only and does not constitute tax advice.
How to use this GST Calculator
- Choose whether you want to add GST to a base amount or remove GST from an inclusive amount.
- Enter the amount and select the applicable GST rate.
- Pick the supply type, either Intra-State or Inter-State.
- Read the live breakdown and copy the result if needed.
What is CGST, SGST and IGST?
CGST is Central Goods and Services Tax. It is the central share of GST collected on intra-state supply, and it is usually paired with SGST at the same rate.
SGST is State Goods and Services Tax. It is the state share of GST charged when goods or services are supplied within the same state, and it mirrors CGST in the split.
IGST is Integrated Goods and Services Tax. It applies to inter-state supply, where the full GST amount is collected as a single tax instead of being split between CGST and SGST.
FAQ
What is the GST calculation formula?
For GST addition, the tax amount is calculated as amount × GST rate, and the total becomes base amount + GST amount. For GST removal, the base amount is total amount ÷ (1 + GST rate), and the GST amount is the difference between total and base.
What's the difference between CGST, SGST and IGST?
CGST and SGST are used together for intra-state transactions and split the GST amount equally. IGST is used for inter-state transactions and keeps the entire GST amount in a single tax line.
Is this GST calculator accurate for all Indian states?
Yes, the calculation model follows the standard GST split logic used across India. You should still verify details against your invoices, accountant, or local compliance rules.
Can I use this for GST-inclusive invoices?
Yes. Use the Remove GST mode to extract the base amount and tax amount from an inclusive invoice value.