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GST Calculator Online Free – Calculate GST Amount Instantly
Calculate GST for all rates — 3%, 5%, 12%, 18%, 28%. Add GST to a price or extract GST from a GST-inclusive amount. Get CGST/SGST breakdown for intra-state and IGST for inter-state transactions. Free, instant, no signup.
✅ All GST Rates🔄 Add & Remove GST🏙️ CGST + SGST🌏 IGST📋 Copy Result⚡ Instant
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Enter an amount to see GST breakdown
GST Rate Reference
0%Essential food, healthcare, education
3%Gold, silver, precious stones
5%Restaurants, economy hotels, transport
12%Processed food, business hotels, books
18%IT services, telecom, most services
28%Luxury cars, tobacco, cement, appliances
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How to Calculate GST – Formula with Examples
GST calculation uses two simple formulas depending on whether the amount you have is exclusive (before tax) or inclusive (after tax).
Add GST (Exclusive Amount)
GST = Amount × Rate ÷ 100
Total = Amount + GST
Example: ₹10,000 at 18%
GST = 10,000 × 18 ÷ 100 = ₹1,800
Total = ₹11,800
Remove GST (Inclusive Amount)
Original = Total ÷ (1 + Rate÷100)
GST = Total − Original
Example: ₹11,800 incl. 18%
Original = 11,800 ÷ 1.18 = ₹10,000
GST = ₹1,800
CGST, SGST, and IGST — How the Split Works
CGST
Central GST — goes to the Central Government. Always equals SGST. For 18% GST: CGST = 9%.
SGST
State GST — goes to the State Government. Always equals CGST. For 18% GST: SGST = 9%.
IGST
Integrated GST — applies to inter-state sales. Full rate collected by Centre, then distributed to destination state.
Rule: Same state supplier and buyer → CGST + SGST. Different state supplier and buyer → IGST only.
GST Rate List in India 2026 – Complete Slab Guide
India has a multi-tier GST structure with six slabs. Use this as a quick reference to find the correct rate for your product or service before calculating.
| Rate | Applicable To | Examples |
|---|---|---|
| 0% | Essential goods and services | Fresh fruits, vegetables, milk, eggs, bread, education services, healthcare, books |
| 3% | Precious metals and stones | Gold, silver, diamonds, precious stones, jewellery |
| 5% | Essential processed items | Sugar, tea, coffee, edible oil, domestic LPG, medicines, economy hotels, Railways AC |
| 12% | Standard processed goods | Frozen meat, butter, cheese, fruit juices, computers, mobile phones, business hotels |
| 18% | Most services & mid-range goods | IT services, telecom, restaurants (AC), financial services, hotel above ₹7,500/night |
| 28% | Luxury & sin goods | Luxury cars, tobacco, pan masala, cement, paint, ACs, dishwashers, aerated drinks |
* GST rates are subject to change by the GST Council. Verify with your CA or the official GST portal for the latest rates.
GST Calculation Examples — Common Scenarios
IT Services Invoice
Base Amount₹50,000
GST Rate18%
BreakdownCGST ₹4,500 + SGST ₹4,500
Total₹59,000
Restaurant Bill (AC)
Base Amount₹2,000
GST Rate18%
BreakdownCGST ₹180 + SGST ₹180
Total₹2,360
Mobile Phone Purchase
Base Amount₹30,000
GST Rate12%
BreakdownIGST ₹3,600
Total₹33,600
Gold Jewellery
Base Amount₹1,00,000
GST Rate3%
BreakdownCGST ₹1,500 + SGST ₹1,500
Total₹1,03,000
Cement (50 kg bag)
Base Amount₹400
GST Rate28%
BreakdownCGST ₹56 + SGST ₹56
Total₹512
Economy Hotel Stay
Base Amount₹2,500
GST Rate12%
BreakdownCGST ₹150 + SGST ₹150
Total₹2,800
Intra-State vs Inter-State GST — Key Differences
🏙️ Intra-State Supply
✓Supplier and buyer in the same state
✓Tax = CGST + SGST (split equally)
✓Both Centre and State collect tax
✓Example: Mumbai seller, Mumbai buyer
18% GST → CGST 9% + SGST 9%
🌏 Inter-State Supply
✓Supplier and buyer in different states
✓Tax = IGST only (no split)
✓Centre collects, distributes to destination state
✓Example: Mumbai seller, Delhi buyer
18% GST → IGST 18% (full rate)
Important for ITC: Businesses can claim Input Tax Credit on CGST paid against CGST liability, SGST against SGST liability, and IGST against IGST, CGST, or SGST liability (in that order). Cross-utilization between CGST and SGST is not permitted.
Frequently Asked Questions — GST Calculator
How do I calculate GST on an amount?
To add GST: GST Amount = Original Amount × (GST Rate ÷ 100). Total Amount = Original Amount + GST Amount. Example: ₹10,000 at 18% GST → GST = ₹1,800 → Total = ₹11,800. To remove GST from a GST-inclusive amount: Original Amount = Total ÷ (1 + GST Rate ÷ 100). Example: ₹11,800 inclusive of 18% GST → Original = ₹11,800 ÷ 1.18 = ₹10,000.
What is the difference between CGST, SGST, and IGST?
CGST (Central GST) and SGST (State GST) apply to intra-state transactions — when the buyer and seller are in the same state. Each is half the total GST rate. For 18% GST, CGST = 9% and SGST = 9%. IGST (Integrated GST) applies to inter-state transactions — when buyer and seller are in different states, or for imports/exports. IGST equals the full GST rate (18% in this example). The government then distributes IGST between the centre and the destination state.
What are the GST rates in India in 2026?
India has six GST slabs: 0% (essential items — basic food, healthcare, education), 3% (gold, silver, precious stones), 5% (economy hotels, restaurants without AC, basic transport, essential packaged food), 12% (processed food, business class hotels, books, medicines), 18% (IT services, telecom, most professional services, restaurant in AC premises), and 28% (luxury goods — premium cars, tobacco, cement, large appliances, aerated drinks).
How do I remove GST from an amount that includes GST?
To extract the original price from a GST-inclusive amount, use: Original Price = GST-Inclusive Amount ÷ (1 + GST Rate ÷ 100). Example: A product costs ₹5,900 including 18% GST. Original price = ₹5,900 ÷ 1.18 = ₹5,000. GST amount = ₹5,900 − ₹5,000 = ₹900. Use the "Remove GST" mode in our calculator to do this instantly.
What is the GST rate on services in India?
Most services in India attract 18% GST. This includes IT and software services, professional services (consulting, legal, accounting), telecom services, financial services, digital marketing, and most B2B services. Some services have different rates: restaurants (5%), healthcare (0%), construction (5% or 12% depending on the project), and insurance (18%). Export of services is zero-rated under GST with no tax payable.
Is GST calculated on the discounted price or original price?
Under GST rules, if a discount is mentioned on the invoice at the time of sale, GST is calculated on the discounted (net) price — not the original price. If a post-sale discount is given (like a retrospective rebate), GST must be reversed using a credit note. Example: Product MRP ₹10,000, 10% discount on invoice. Taxable value = ₹9,000. GST at 18% = ₹1,620 (not ₹1,800).
Who needs to register for GST in India?
GST registration is mandatory for: businesses with annual turnover above ₹40 lakh (goods) or ₹20 lakh (services) in normal states. Threshold is ₹20 lakh for goods and ₹10 lakh for services in special category states. Also mandatory for: inter-state suppliers regardless of turnover, e-commerce operators, input service distributors, and those paying tax under reverse charge mechanism. Voluntary registration is also allowed below threshold.