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How to Use the GST Calculator

Learn how to calculate GST amount, net price, and gross price for any Indian GST slab in seconds.

Calculating GST manually is slow and error-prone. ToolBox GST Calculator makes it simple to find the net price, GST amount, and gross price for any Indian GST slab.

Understanding GST Slabs

India uses four main GST rates: 5%, 12%, 18%, and 28%. Essential goods often fall under 5%, while luxury items attract 28%. Most services and common products fall under 12% or 18%.

How to Calculate GST

  1. Open the GST Calculator.
  2. Enter the base price of the product or service.
  3. Select the applicable GST slab.
  4. Choose whether GST is included in or added to the price.
  5. View the net amount, GST amount, and total price instantly.

Reverse GST Calculation

If you only know the total price including GST, switch to reverse mode. The calculator splits the total into base price and GST, which is useful when verifying invoices.

Example

For a product priced at ₹1,000 with 18% GST: GST amount is ₹180 and total price is ₹1,180. For intra-state sales, this splits into ₹90 CGST and ₹90 SGST.

Use It for Invoicing

Pair the GST Calculator with the Invoice Generator to create GST-compliant invoices automatically.

Frequently Asked Questions

What is GST?
GST (Goods and Services Tax) is a single indirect tax applied to the supply of goods and services in India.
What GST slabs does the calculator support?
The calculator supports 5%, 12%, 18%, and 28% GST slabs.
Can I calculate reverse GST?
Yes, enter the total inclusive price and the calculator extracts the base price and GST amount.