GST Calculator

Calculate GST, CGST, SGST and final invoice amount instantly — add GST to a price or remove it from a GST-inclusive amount.

GST details

Results update instantly as you change any value.

Calculation mode

Enter the price before GST, for example 10000.

GST rate

These are common rate presets only. GST rates vary by goods/services classification and applicable notifications. Select the rate applicable to your transaction. For official rate information, check the GST/CBIC sources. CBIC GST rates

Type of supply

Same state: 18% GST splits into 9% CGST and 9% SGST.

Your GST results

Final amount (incl. GST)

₹11,800.00

₹10,000.00 + 18% GST (₹1,800.00) · CGST + SGST

  • ₹10,000.00

    Base amount

    Taxable value

  • ₹1,800.00

    GST amount

    At 18%

  • ₹900.00

    CGST

    9% to the Centre

  • ₹900.00

    SGST

    9% to the State

Understanding GST calculation

Adding GST is simple arithmetic: GST = base × rate ÷ 100, and the invoice total is the base plus that GST. Removing GST from a tax-inclusive price works backwards: base = inclusive ÷ (1 + rate ÷ 100). An intra-state supply splits the GST equally into CGST and SGST, while an inter-state supply carries the whole amount as IGST.

What is GST?

GST is a destination-based indirect tax charged on the supply of goods and services in India. The tax is added to the taxable value of the supply and collected by the supplier on behalf of the government.

What is CGST?

Central GST is the central government's half of the tax on an intra-state supply. On an 18% supply, CGST is 9% of the taxable value.

What is SGST?

State GST is the state's half of the same intra-state charge (UTGST in union territories). On an 18% supply, SGST is 9%.

What is IGST?

Integrated GST replaces the CGST + SGST split on inter-state supplies and imports. The entire 18% is charged as one IGST line.

What is a GST-inclusive price?

A GST-inclusive price already contains the tax. A ₹11,800 inclusive price at 18% is made up of ₹10,000 taxable value and ₹1,800 GST.

How to calculate GST?

GST amount = base amount × rate ÷ 100. Add it to the base to get the final payable amount, then split it into CGST and SGST for intra-state supplies.

How to remove GST from an inclusive price?

Divide the inclusive price by (1 + rate ÷ 100) to get the original amount. The difference between the two figures is the GST contained in the price.

Frequently asked questions

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