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📈 GST Calculator

Calculate GST amount, original price and total price for any GST slab instantly.


What is GST?

GST (Goods and Services Tax) is India's comprehensive indirect tax that replaced a complex system of multiple taxes including VAT, service tax, central excise duty, and others. Introduced on July 1, 2017, GST follows a "one nation, one tax" principle and is levied on the supply of goods and services across India. Our GST calculator online helps businesses and consumers quickly calculate GST amounts.

GST Slabs in India

How to Calculate GST – Adding and Removing GST

To add GST: GST Amount = Original Price × GST Rate / 100. Final Price = Original Price + GST Amount. Example: Rs. 1000 at 18% GST = Rs. 1000 + Rs. 180 = Rs. 1,180.
To remove GST (reverse calculation): Original Price = Final Price / (1 + GST Rate/100). GST Amount = Final Price − Original Price. Example: If final price is Rs. 1,180 at 18%, Original = 1180/1.18 = Rs. 1,000.

CGST, SGST, and IGST Explained

GST is split into components depending on the nature of the transaction. For intra-state transactions (within the same state): CGST (Central GST) + SGST (State GST), each at half the total GST rate. For inter-state transactions (between different states): IGST (Integrated GST) at the full GST rate, collected by the central government and shared with the destination state.

GST Registration and Compliance

Businesses with annual turnover above Rs. 40 lakh (Rs. 20 lakh for services) must register for GST. Registered businesses can claim Input Tax Credit (ITC) — the GST paid on purchases can be offset against GST collected on sales, reducing the net tax liability. File GSTR-1 (sales) and GSTR-3B (monthly summary) returns regularly to remain compliant.

Frequently Asked Questions

What is GST?

GST (Goods and Services Tax) is a unified indirect tax in India that replaced multiple taxes like VAT, service tax, and excise duty. It was introduced in July 2017.

What are the GST slabs in India?

India has four main GST slabs: 5%, 12%, 18%, and 28%. Essential goods are taxed at 0% or 5%, while luxury items are taxed at 28%.

How do I calculate GST?

To add GST: Price with GST = Original Price × (1 + GST Rate/100). To find GST amount: GST = Original Price × GST Rate / 100.

What is CGST and SGST?

For intra-state transactions, GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions, IGST (Integrated GST) is applied.