GST Calculator
Add or remove GST from any amount instantly — supports all standard Indian GST slabs.
How GST Calculation Works
GST (Goods and Services Tax) is a single indirect tax applied on the supply of goods and services in India. When you add GST, the tax is calculated on top of a base amount to arrive at the final price the customer pays. When you remove GST, you’re working backward from a GST-inclusive price to find out how much of it was the original base amount and how much was tax.
For example, adding 18% GST to a base amount of ₹1,000 gives a GST amount of ₹180 and a total of ₹1,180. Removing 18% GST from a total of ₹1,180 gives back the same base amount of ₹1,000 and GST of ₹180 — the two operations are exact inverses of each other.
If you’re budgeting monthly costs after factoring in loan repayments, our EMI Calculator can help you plan those alongside GST-inclusive expenses. For quick percentage-based calculations beyond tax, try the Percentage Calculator.
Frequently Asked Questions
What are the standard GST slabs in India?
The common GST slabs are 3%, 5%, 12%, 18%, and 28%, with different goods and services taxed at different rates depending on category.
How do I calculate GST backward from a total price?
Switch to “Remove GST” mode, enter the GST-inclusive total, and select the rate that was applied. The calculator will show the original base amount and the tax portion separately.
Is this calculator suitable for GST return filing?
This tool is meant for quick, illustrative calculations only. For actual GST return filing or compliance purposes, please consult a tax professional or your accounting software.