GST Calculator India – Add or Remove GST Online
Base Amount
₹0
GST Amount
₹0
CGST
₹0
SGST
₹0
Total Amount (with GST)
₹0
What Is a GST Calculator?
The Goods and Services Tax (GST) is an indirect tax levied on the supply of goods and services in India. It replaced multiple cascading taxes and unified the country under a single tax regime from July 2017. A GST calculator lets you quickly determine the tax component of any transaction, whether you need to add GST to a base price or extract GST from an inclusive amount.
India uses four primary GST slabs: 5%, 12%, 18%, and 28%. Essential items like food grains attract the lowest rate, while luxury goods and certain services fall under the highest bracket. When you add GST, the calculator multiplies your base amount by the selected rate and adds it to the original price. When you remove GST, it works backwards from the GST-inclusive amount using the formula: Base = Amount ÷ (1 + Rate/100).
The results also show the split between CGST (Central GST) and SGST (State GST), which are equal halves of the total GST for intra-state transactions. For inter-state transactions, the entire amount is collected as IGST. This calculator is useful for business owners preparing invoices, freelancers quoting clients, and consumers who want to verify the tax charged on their purchases. All calculations happen instantly in your browser with no data sent to any server.
Formula
Add GST (exclusive to inclusive):
GST Amount = Base Price × (GST Rate / 100)Total Price = Base Price + GST Amount
Remove GST (inclusive to exclusive):
Base Price = GST-Inclusive Price / (1 + Rate/100)GST Amount = GST-Inclusive Price − Base Price
Where:
- GST Rate = 5%, 12%, 18%, or 28% (India's four main slabs)
- CGST = GST Amount / 2 (for intra-state transactions)
- SGST = GST Amount / 2 (for intra-state transactions)
Example Calculation
Scenario: A product costs ₹1,000 before GST at 18%
- Step 1: GST = ₹1,000 × 18/100 = ₹180
- Step 2: Total = ₹1,000 + ₹180 = ₹1,180
- Step 3: CGST = ₹180 / 2 = ₹90, SGST = ₹90
- Result: Customer pays ₹1,180 (₹90 CGST + ₹90 SGST)
Disclaimer: This GST calculator is provided for informational and educational purposes only. It does not constitute financial, tax, or legal advice. GST rates and rules are subject to change by the Government of India. Always consult a qualified tax professional or refer to the official GST portal (gst.gov.in) for accurate and up-to-date information before making any tax-related decisions.