GST Calculator
Calculate Goods and Services Tax (GST) in India instantly. Switch seamlessly between intra-state (CGST & SGST) and inter-state (IGST) transactions, with instant 5%, 12%, 18%, and 28% rate presets.
How to Use GST Calculator
2. Select calculation type: 'Add GST (Price Before GST / Exclusive)' or 'Remove GST (Price Including GST / Inclusive)'.
3. Click on a standard GST slab button (0%, 5%, 12%, 18%, 28%) or type a custom rate.
4. Choose Intra-State (splits into CGST and SGST equally) or Inter-State (IGST).
5. View your calculated base amount, tax breakdown, and grand total with one-click copy.
How It Works: GST Calculator
Formula & Calculation Methodology
GST Amount = (Original Cost × GST Rate) / 100
Net Price = Original Cost + GST Amount
GST Inclusive Formula (Removing GST):
GST Amount = Original Cost - [Original Cost × {100 / (100 + GST Rate)}]
Net Base Price = Original Cost - GST Amount
Tax Splitting:
For Intra-State: CGST = GST Amount / 2, SGST = GST Amount / 2
For Inter-State: IGST = GST Amount
Notice: Designed to provide accurate results based on the standard formulas described above.
Practical Real-World Examples
• Base Taxable Value: ₹10,000
• GST Rate: 18%
• CGST (9%): ₹900
• SGST (9%): ₹900
• Total GST: ₹1,800
• Final Amount Payable: ₹11,800
Example 2 (Removing 18% GST from ₹1,180 Inclusive Price):
• Inclusive Amount: ₹1,180
• Base Pre-Tax Amount: ₹1,180 × 100 / 118 = ₹1,000
• GST Component: ₹180 (CGST ₹90, SGST ₹90)
Frequently Asked Questions
Find verified answers regarding GST Calculator, calculations, formulas, data privacy, and supported features.
Goods and Services Tax (GST) is an indirect tax enacted in India on July 1, 2017, replacing multiple federal and state levies including VAT, Service Tax, and Excise Duty. It follows a multi-stage, destination-based taxation model.
For adding GST: GST Amount = (Base Price × GST Rate) / 100, and Total = Base Price + GST Amount. For inclusive amounts: Base Price = (Total Amount × 100) / (100 + GST Rate), and GST Amount = Total Amount - Base Price.
CGST (Central GST) and SGST (State GST) are levied together in equal halves on intra-state supplies within the same state. IGST (Integrated GST) is charged by the Central Government on inter-state supplies moving across state borders.
If ₹1,000 is exclusive of tax, 18% GST is (1000 × 18) / 100 = ₹180, making the total ₹1,180. If ₹1,000 is inclusive of 18% GST, the pre-tax base price is (1000 × 100) / 118 = ₹847.46, and the GST is ₹152.54.
India currently operates primarily on four standard GST rate slabs: 5% (essential goods), 12% (standard goods/foods), 18% (most commercial services and manufactured products), and 28% (luxury items and demerit goods), along with 0% for basic unbranded groceries.
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