Find the original base price by removing GST from a GST-inclusive total amount.
Base Price = Total Amount ÷ (1 + GST Rate ÷ 100)
The GST amount is then simply the difference between the total amount you entered and this calculated base price.
This is useful when you have a final, GST-inclusive price (like an MRP or a quoted total) and need to find the original base price — for example, to record the correct taxable value in your books, or to compare prices across vendors quoting different tax treatments.
Base Price = Total Amount ÷ (1 + GST Rate/100). For example, removing 18% GST from ₹1,180 gives a base price of ₹1,000 (₹1,180 ÷ 1.18).
Yes, simply select or enter the applicable GST rate (5%, 12%, 18%, 28%, or any custom rate) for the goods or service in question.
Yes — dividing the GST-inclusive amount by (1 + rate/100) is exactly what this calculator does. For 18% GST, that means dividing by 1.18; for 5% GST, dividing by 1.05, and so on.
The main GST Calculator can both add and remove GST and shows the CGST/SGST/IGST split. This page is a quicker, focused tool purely for extracting the base price from a GST-inclusive total.
Whenever you have a final, tax-inclusive price and need to know the underlying base value — for accounting, invoicing, or comparison purposes — this calculator extracts that figure instantly using the standard reverse-GST formula.
For the full add/remove toggle with CGST/SGST/IGST breakup, use our main GST Calculator, or generate a compliant tax invoice directly with our Invoice Generator.
