Free India calculator
GST Calculator
Calculate Goods and Services Tax (GST) on a price or find the GST included in an amount. Choose a rate and calculation method below.
This is an estimate using the rate you select. Actual GST treatment and applicable rates depend on the goods or services and transaction. Confirm the correct rate for tax or invoicing purposes.
How to calculate GST
Adding GST: GST amount = pre-tax amount × GST rate ÷ 100. Add this tax to the pre-tax amount to get the total.
Extracting GST: GST included = total amount × GST rate ÷ (100 + GST rate).
Within a state: GST is commonly split equally between CGST and SGST for applicable intra-state supplies.
Between states: IGST generally applies to inter-state supplies.
Example
For a pre-tax amount of ₹10,000 at 18% GST, the GST is ₹1,800 and the total is ₹11,800. For an applicable intra-state transaction, this would be ₹900 CGST and ₹900 SGST.