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GST Calculator

Goods And Services Tax
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GST Calculator

GST Rate Details:
• 5% – Basic necessities like food items
• 12% – Processed foods, computers
• 18% – Telecom, banking, electronics
• 28% – Luxury cars, tobacco, aerated drinks

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How to calculate GST
To calculate the Goods and Services Tax (GST) for a product or service, you can either add the GST to a base amount or remove it from a total amount that already includes tax.
The method you use depends on whether you have the pre-tax or post-tax price. 
Before you begin, you will need to know the applicable GST rate, which varies depending on the type of goods or services. 
Calculation for adding GST
This method is used when you know the base price of an item and need to find the final price by adding the GST. 
Formula
  • GST amount = (Original Cost) × (GST Rate) / 100
  • Net Price = Original Cost + GST Amount 
  • Example
  • If a product costs ₹1,000 (excluding GST) and the GST rate is 18%:
    • GST amount = (1,000 × 18) / 100 = ₹180
    • Net Price = ₹1,000 + ₹180 = ₹1,180 
    • Calculation for removing GST (Reverse GST)
    This method is used when you know the total price of an item (which includes GST) and need to find the base price and the exact GST amount. 
    Formula
  • GST Exclusive Price = (GST Inclusive Price) / (1 + (GST Rate / 100))
  • GST Amount = GST Inclusive Price - GST Exclusive Price 
  • Example
  • If a product costs ₹1,180 (including GST) and the GST rate is 18%:
    • GST Exclusive Price = 1,180 / (1 + (18 / 100)) = 1,180 / 1.18 = ₹1,000
    • GST Amount = ₹1,180 - ₹1,000 = ₹180 
    • How CGST, SGST, and IGST are calculated
    The total GST amount is divided based on whether the transaction is within the same state (intra-state) or between different states (inter-state). 
  • Intra-state transaction: The GST is split equally between the Central Goods and Services Tax (CGST) and the State Goods and Services Tax (SGST).
    • CGST Amount = Total GST / 2
    • SGST Amount = Total GST / 2
  • Inter-state transaction: The entire amount is charged as Integrated Goods and Services Tax (IGST), which is collected by the central government.
    • IGST Amount = Total GST 
    • Example for an intra-state transaction
    • Using the example of an item with a base price of ₹1,000 and an 18% GST rate in an intra-state sale:
    • Total GST = ₹180
    • CGST = ₹180 / 2 = ₹90
    • SGST = ₹180 / 2 = ₹90