Use this free GST Calculator to calculate GST amount, CGST, SGST, IGST, taxable value and final price online. Enter the amount and applicable GST rate to quickly calculate the tax amount without doing the calculation manually.
The calculator supports adding GST to an amount, removing GST from a GST-inclusive price, and calculating IGST for interstate transactions.
GST Calculator
Calculate GST amount, CGST, SGST, IGST and final price easily.
Add GST
Calculate GST amount and final price by adding GST to the original amount.
Final Amount = Amount + GST Amount
Remove GST
Find the original price, GST amount and taxable value from a GST-inclusive price.
IGST Calculator
Calculate IGST and the final amount for interstate transactions.
GST Calculation
GST is calculated based on the taxable amount and applicable GST rate. For intra-state transactions, GST is generally divided into CGST and SGST, while IGST is used for interstate transactions.
What Is a GST Calculator?
A GST Calculator is an online tool that helps calculate the Goods and Services Tax amount on a taxable value. It can also be used to find the original taxable amount from a GST-inclusive price.
How to Calculate GST?
The basic GST formula is:
GST Amount = Taxable Amount × GST Rate ÷ 100
The final amount after adding GST is:
Final Amount = Taxable Amount + GST Amount
Example
If the taxable amount is ₹1,000 and the GST rate is 18%:
GST = ₹1,000 × 18 ÷ 100 = ₹180
Therefore:
Final Amount = ₹1,000 + ₹180 = ₹1,180
How to Calculate GST Inclusive Price?
When the displayed price already includes GST, the taxable amount can be calculated using:
Taxable Amount = GST Inclusive Amount ÷ (1 + GST Rate ÷ 100)
For example, for ₹1,180 including 18% GST:
Taxable Amount = ₹1,180 ÷ 1.18 = ₹1,000
The GST amount is ₹180.
CGST and SGST Calculation
For an applicable intra-state GST transaction, the GST amount can be divided between CGST and SGST.
For example, if the total GST is ₹180:
CGST = ₹90
SGST = ₹90
The calculator displays the CGST and SGST amounts separately.
What Is IGST?
IGST is used for applicable interstate supplies. The IGST amount can be calculated by multiplying the taxable amount by the applicable IGST rate.
IGST = Taxable Amount × IGST Rate ÷ 100
GST Rates
The calculator provides commonly used GST rate options including:
- 0%
- 5%
- 12%
- 18%
- 28%
A custom rate can also be entered when required.
Always use the GST rate applicable to the particular goods or services and transaction.
How to Use the GST Calculator
- Select Add GST, Remove GST, or IGST.
- Enter the amount.
- Select the applicable GST rate.
- Use the custom rate option when required.
- Click the calculation button.
- View the GST amount and final amount.
GST Calculator Features
Mobile-friendly calculator
Add GST to an amount
Remove GST from a GST-inclusive amount
Calculate CGST and SGST
Calculate IGST
Calculate taxable value
Calculate final price
Use common GST rates
Enter a custom GST rate