GST Calculator

Calculate GST inclusive and exclusive amounts. Shows CGST, SGST breakdown for 5%, 12%, 18%, and 28% GST rates.

Last updated: June 1, 2026

Amount (₹)

GST Rate (%)

Calculation Type:

Base Amount

₹10,000

GST Amount

₹1,800

CGST (9%)

₹900

SGST (9%)

₹900

Total Amount (with GST)

₹11,800

What is GST Calculator?

A GST (Goods and Services Tax) calculator computes the tax component of prices in India, showing the breakdown between CGST (Central GST) and SGST (State GST) or IGST (Integrated GST for interstate transactions). India's GST has multiple rate slabs — 5%, 12%, 18%, and 28% — applied to different categories of goods and services. This tool calculates both GST-inclusive (adding tax to a base price) and GST-exclusive (extracting tax from a total price) amounts, essential for invoicing, accounting, and pricing decisions.

How It Works

Enter an amount and select the GST rate (5%, 12%, 18%, or 28%). For GST-inclusive calculation: GST amount = base price × (rate/100), total = base price + GST. For GST-exclusive (reverse calculation): base price = total / (1 + rate/100), GST = total - base price. For intra-state transactions, the tool splits GST equally into CGST and SGST (each being half the total GST rate). For interstate transactions, the full amount is IGST. Results show all components clearly for invoice preparation.

Common Use Cases

•Calculating GST to add on invoices for goods and services sold in India
•Reverse-calculating the base price from a GST-inclusive MRP for accounting entries
•Determining CGST and SGST breakdown for intra-state sales invoicing
•Comparing prices across vendors by normalizing GST-inclusive and exclusive quotes
•Preparing tax filing data by calculating GST collected and paid during a period
•Verifying vendor invoices to ensure correct GST rate and computation on purchases