GST Calculator

Calculate Original Amount from GST Inclusive Price

₹
%
Original Amount (Before GST) ₹0.00
CGST Amount ₹0.00
SGST Amount ₹0.00
Total GST Amount ₹0.00
Final Amount (Including GST) ₹0.00
Effective GST Rate 0%

How to Use

  1. Enter the final amount (including GST)
  2. Select the applicable GST rate
  3. Optionally check "Show CGST/SGST Split" to see the tax breakup
  4. Click Calculate to see the original amount and tax details

  1. Enter the original amount (before GST)
  2. Select the applicable GST rate
  3. Optionally check "Show CGST/SGST Split" to see the tax breakup
  4. Click Calculate to see the final amount and tax details

GST Calculator & Reverse Tax Extractor

What is a Forward & Reverse GST Calculator?

The Goods and Services Tax (GST) requires intricate slicing of base invoice values, specifically dividing tax structures mathematically into independent CGST and SGST brackets. While adding tax (forward calculation) is simple multiplication, discovering the original pre-tax value from a "Tax Inclusive final price" (Reverse Calculation) requires strict algebra. Our dedicated financial GST engine completely solves both scenarios instantly.

How to Extract Base Value (Reverse GST)

  1. Toggle the function to "Remove GST" (Calculate Base Price).
  2. Enter the total, tax-inclusive MRP value indicated on your receipt (e.g., ₹1180).
  3. Select the exact tax bracket applied natively (5%, 12%, 18%, or 28%).
  4. Calculate. The system extracts the true base value (₹1000) and displays the isolated tax burden (₹180), further splitting it symmetrically for accounting logs.

Designed for CA and E-commerce Bookkeeping

We've programmed strictly bound rounding logic, ensuring exact two-decimal precision. This matches accounting ledgers flawlessly, guaranteeing safe migration of tax details to Tally software infrastructures without structural deviations.