Reverse GST Calculator

Reverse GST Calculator – Calculate Base Price & GST Amount

The Reverse GST Calculator helps you break down a GST-inclusive price into its base amount (before tax) and the GST component. This is useful when you know the final price of a product or service that already includes GST and want to find out how much tax is included and what the original value was before applying GST.

With this tool, simply enter the total amount and the applicable GST rate — the calculator gives you the base price and GST portions instantly.

How Reverse GST Works

If you know the final price (inclusive of GST) and the GST rate, the original price and GST can be calculated using:

• Base Price = Total Amount ÷ (1 + GST Rate/100)

• GST Amount = Total Amount - Base Price

This lets you understand the tax breakdown of any GST-inclusive price.

How to Use the LegalBabu Reverse GST Calculator

• Enter Total Amount (Inclusive of GST) – total price on the invoice or bill.

• Select GST Rate – choose the applicable rate (e.g., 5%, 12%, 18%, 28%).

• Click Calculate – get: 
  • Base price (before GST)
  • GST amount included
  • Total price (GST inclusive)

Total price (GST inclusive)

This shows how Rs.1,18,000 including GST breaks down into Rs.1,00,000 base price and rs.18,000 GST.

Why Use LegalBabu’s Reverse GST Calculator?

• Fast and easy tax computation
• Helps business pricing and billing
• Useful for accountants and tax professionals
• Shows clear GST breakdown
• Works with standard GST rates