Our free GST calculator makes it easy to compute Goods and Services Tax for any transaction in India. Whether you need to add GST to a base price or remove GST from an inclusive price, our tool handles both scenarios instantly. Simply choose the calculation mode, enter the amount, and select the applicable GST rate — 5%, 12%, 18%, or 28%. The calculator displays the complete tax breakdown including GST amount, CGST (Central GST), SGST (State GST), and the IGST equivalent for inter-state transactions. Ideal for business owners, freelancers, accountants, and consumers who need quick GST calculations on the go.
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Calculation Mode
Enter the amount before GST
GST Rate
₹180
GST Amount
| Original Amount | ₹1,000 |
| GST Amount (@18%) | ₹180 |
| CGST (9%) | ₹90 |
| SGST (9%) | ₹90 |
| Total Amount | ₹1,180 |
Inter-state Transaction (IGST)
For inter-state transactions, IGST = CGST + SGST = ₹180
Quick Reference
• 5% — Essential items, transport
• 12% — Processed food, IT services
• 18% — Most manufactured goods, restaurants
• 28% — Luxury goods, automobiles, tobacco