How do I calculate GST on an amount?
For a GST-exclusive price, GST amount = (base amount × GST rate) ÷ 100 and invoice total = base amount + GST. For example, 18% GST on ₹10,000 is ₹1,800, giving a total of ₹11,800.
Free Online GST Calculator India
FREE GST CALCULATOR
Calculate GST online in seconds
Enter an amount and pick a GST rate — CGST, SGST, and IGST are calculated instantly. Works for both GST-exclusive and GST-inclusive prices.
GST Calculator
Results update automatically as you type. This calculator is for quick estimates — actual tax liability depends on HSN/SAC classification and input tax credit.
Your GST breakup
- Taxable value (base amount)
- ₹10,000.00
- CGST (9%)
- ₹900.00
- SGST (9%)
- ₹900.00
- Total GST
- ₹1,800.00
- Invoice total
- ₹11,800.00
How GST is calculated in India
For a GST-exclusive price, GST amount = (base amount × GST rate) ÷ 100. For a GST-inclusive price, base amount = (total × 100) ÷ (100 + GST rate). On supplies within a state the tax is split equally between CGST and SGST, while supplies between states attract IGST at the full rate. Common GST slabs in India are 0.25%, 3%, 5%, 12%, 18%, and 28%.
GST calculator FAQs
How do I remove GST from a GST-inclusive price?
Base amount = (GST-inclusive total × 100) ÷ (100 + GST rate). For a ₹11,800 total at 18% GST, the base amount is ₹10,000 and the GST portion is ₹1,800.
What is the difference between CGST, SGST, and IGST?
For supplies within the same state, GST is split equally between CGST and SGST. For supplies between states, IGST is charged at the full GST rate instead.
What are the GST rates in India?
Common GST slabs in India are 0.25%, 3%, 5%, 12%, 18%, and 28%, depending on the HSN or SAC classification of the goods or services supplied.