Calculator
GST Calculator
Add GST to a base price or remove GST from an inclusive MRP. CGST, SGST, and IGST handled.
Mode
GST Rate
Transaction Type
Base Amount
₹10,000
GST
₹1,800
18% on base
Total Payable
₹11,800
Total Payable
₹11,800
Frequently asked questions
GST in India has five slabs — 0%, 5%, 12%, 18%, and 28%. Essentials like fresh produce sit at 0%; daily-use items at 5%; standard goods and most services at 12%–18%; and luxury or sin goods (premium cars, tobacco, aerated drinks) at 28% — often with an additional cess.
To add GST, multiply the base amount by the GST rate (e.g. ₹1,000 × 18% = ₹180) and add it back: ₹1,180 total. To remove GST from an MRP that already includes it, divide the MRP by (1 + rate); for 18% GST, divide by 1.18.
For an intra-state sale (buyer and seller in the same state), GST is split equally into CGST (Central) and SGST (State). For an inter-state sale, the same total GST goes to IGST (Integrated GST) and is later apportioned by the GST Council.
Use the formula: Original price = MRP ÷ (1 + GST%). For an MRP of ₹1,180 with 18% GST, original = ₹1,180 ÷ 1.18 = ₹1,000. The GST extracted = ₹180.
Most fresh fruits and vegetables, milk, curd, eggs, unbranded atta and rice, salt, education and healthcare services, and select books and newspapers are GST-exempt. Petroleum, alcohol for human consumption, and electricity remain outside GST.
How GST is calculated in India
GST — Goods and Services Tax — is a single indirect tax that replaced VAT, service tax, and other levies in 2017. It applies on the value addition at every stage of the supply chain. To add GST, multiply the base amount by the rate; to remove GST from an inclusive price, divide the inclusive amount by 1 + rate / 100.
CGST, SGST, and IGST — the split
For a sale within the same state (intra-state), the GST is split equally between Central GST and State GST. For a sale across states (inter-state), the same total flows to Integrated GST, which the GST Council later apportions between the Centre and states. This calculator does the split for you so you can fill your invoice or e-way bill correctly.
When this calculator is useful
- Sellers setting MRP — to back-calculate the base price you keep after GST.
- Buyersverifying invoices — to check the vendor's GST workings line by line.
- Freelancers and small businesses preparing quotes that include or exclude GST.
Disclaimer: Rates shown reflect the GST slab structure as of 2026. Specific HSN / SAC code rates may vary; always confirm the applicable rate with your CA or the official GST portal before filing.
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