GST Calculator
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Original Amount (before GST)
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Calculate GST
Free Online GST Calculator for India
Our GST calculator handles both adding GST to a base price and removing GST from an inclusive price — in one simple tool. It is updated for GST 2.0 (effective 22 September 2025), which replaced the old 5/12/18/28% structure with two main slabs of 5% and 18% plus a special 40% rate for luxury and sin goods. Pick a slab or enter any custom rate — use 12% or 28% to recheck invoices issued before the change. Instantly get CGST, SGST and IGST breakdowns for intra-state and inter-state transactions.
Whether you are a business owner generating invoices, a consumer checking if GST was correctly charged, a CA verifying tax amounts, or a student learning about indirect taxation — this tool gives you accurate GST calculations in seconds.
GST Slab Rates in India
| GST Rate | Category | Examples |
|---|---|---|
| 0% | Exempt | Fresh milk, paneer, Indian breads, life-saving drugs, individual health & life insurance, education |
| 3% | Precious metals | Gold, silver and jewellery |
| 5% | Essential goods (merit rate) | Packaged food, soaps, toothpaste, most medicines, economy hotels, restaurants |
| 18% | Standard rate | Small cars, two-wheelers up to 350cc, ACs, TVs, cement, IT and telecom services |
| 40% | Luxury & sin goods (demerit rate) | Pan masala, tobacco, aerated & sugary drinks, large cars, bikes above 350cc, yachts, betting & online gaming |
Selling to customers in the UK, Europe or the Gulf? Those countries charge VAT instead of GST – use our VAT calculator for UK 20%, UAE 5%, Saudi 15% and other rates.
CGST vs SGST vs IGST — Explained
When you buy something within the same state (intra-state), the GST is split equally between the Central Government (CGST) and the State Government (SGST). On an 18% GST purchase, CGST = 9% and SGST = 9%. When buying across state lines (inter-state), the full GST is collected as IGST (Integrated GST) by the Central Government and later shared with the destination state.
Read our guide: How to calculate GST – formula, examples and GST 2.0 rates.
Frequently Asked Questions
How do I calculate GST on a price?
GST amount = (Original price × GST rate) ÷ 100. Total price = Original price + GST amount. Example: ₹1000 with 18% GST → GST = ₹180 → Total = ₹1180.
How do I remove GST from a GST-inclusive price?
Original price = GST-inclusive price ÷ (1 + GST rate ÷ 100). Example: ₹1180 with 18% GST → ₹1180 ÷ 1.18 = ₹1000 original price. Use the "Remove GST" mode above.
What GST rate applies to restaurants?
Most restaurants charge 5% GST without input tax credit. AC restaurants and those in 5-star hotels may charge 18% GST. The rate depends on the restaurant type and location.
Is this GST calculator free?
Yes, 100% free. No account needed. All calculations happen instantly in your browser and no data is stored.