Calculate GST amount, pre-GST and post-GST prices for all GST slabs. Free India GST inclusive and exclusive calculator.
Goods and Services Tax (GST) is India's unified indirect tax system implemented in July 2017, replacing dozens of state and central taxes. GST applies to almost all goods and services in India at rates of 0%, 5%, 12%, 18%, or 28%.
Whether you are a business owner calculating GST to charge customers, a freelancer adding GST to invoices, or a consumer checking if GST is included in a quoted price — our calculator handles both types: adding GST to a base price (exclusive) and extracting GST from an all-inclusive price (inclusive).
GST exclusive (adding GST to base price):
• GST amount = Base price × GST rate
• Final price = Base price + GST amount
• CGST = GST amount ÷ 2 (intra-state)
• SGST = GST amount ÷ 2 (intra-state)
• IGST = GST amount (inter-state)
GST inclusive (extracting GST from all-inclusive price):
• Base price = All-inclusive price ÷ (1 + GST rate)
• GST amount = All-inclusive price − Base price
Common GST rates: 5% (essential items, economy hotels), 12% (processed food, phones), 18% (most services, electronics), 28% (luxury goods, cars, cigarettes)
1. Enter the amount — either the base price or the all-inclusive price
2. Select GST rate — 5%, 12%, 18%, or 28%
3. Select calculation type:
• "Add GST" if you have the base price and want the final price
• "Extract GST" if you have the all-inclusive price and want the base price
4. See GST amount, CGST, SGST/IGST split, and final amounts instantly
• Both modes: Calculate GST-exclusive and GST-inclusive in one tool
• CGST/SGST split: Shows intra-state and inter-state breakdown
• All GST slabs: 3%, 5%, 12%, 18%, 28% all supported
• For businesses: Calculate the exact GST to charge on your invoice
• For consumers: Verify whether the quoted price includes or excludes GST
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