Calculate GST amount instantly with our Free Online GST Rate Calculator 2026. Updated for the GST rate structure effective 22 September 2025 (0%, 3%, 5%, 18% and 40%, plus special and older rates), this free online GST calculator supports CGST, SGST and IGST calculations. Add GST to a base price or remove GST from an inclusive price and get accurate results in real time.
For more information about the new GST slabs, read our blog in Hindi: 22 เคธเคฟเคคเคเคฌเคฐ 2025 เคธเฅ NEW GST Slab: เคเคพเคจเฅเค เคเฅเคฏเคพ เคธเคธเฅเคคเคพ, เคเฅเคฏเคพ เคฎเคนเคเคเคพ เคเคฐ เคเคชเคเฅ เคเฅเคฌ เคชเคฐ เค เคธเคฐ?
Supporting Links
GST Portal (Government of India)
Advanced Features of Our GST Calculator 2026
โก Real-time Calculation Engine
Results update as you type. Whether you need a CGST, SGST, IGST calculation or a simple GST computation, the tool delivers accurate figures instantly โ no button press needed.
๐ท๏ธ All GST Rates in One Tap
Pick any rate โ 0%, 0.25%, 3%, 5%, 12%, 18%, 28% or 40% โ with a single tap, covering current slabs, special rates and older rates still found on some invoices.
๐ฑ Mobile-Responsive Design
Access our GST calculator India from any device. The mobile-optimised interface works smoothly whether you’re in the office, at the shop or on the go.
๐ Dual Calculation Modes
- GST Exclusive: Add GST to your base amount
- GST Inclusive: Extract GST from the total amount
- Perfect for different business scenarios and invoice requirements
How to Calculate GST in our Free Online GST Rate Calculator
Step-by-Step GST Calculation Process
- Enter Your Amount: Input the price of goods or services in rupees.
- Select GST Rate: Tap the applicable rate โ 0%, 0.25%, 3%, 5%, 12%, 18%, 28% or 40%.
- Choose Calculation Type: Exclusive (add GST) or Inclusive (remove GST).
- Select Transaction Type: Intrastate (CGST + SGST) or Interstate (IGST).
- Get Results: View the detailed breakdown with all tax components instantly.
GST Calculation Formula Made Simple
For GST Exclusive (Adding GST):
- GST Amount = (Base Price ร GST Rate) รท 100
- Total Price = Base Price + GST Amount
For GST Inclusive (Removing GST):
- Base Price = Total Price ร 100 รท (100 + GST Rate)
- GST Amount = Total Price โ Base Price
What are the GST Rates in September 2025
Updated GST Slab Structure
From 22 September 2025, most goods and services moved into two main slabs โ 5% and 18% โ with a 40% rate for luxury and sin goods, while special rates continue for precious metals and stones. Examples by slab:
๐ 0% GST Rate (Exempt / Nil-Rated Items)
- Food Items: Fresh vegetables, fruits, milk, eggs and other unpackaged staples
- Healthcare: Hospital services, medical consultation, individual health and life insurance
- Education: Educational services, books and notebooks
๐ 3% GST Rate (Precious Metals)
- Gold & Silver: Metal value of jewellery, coins and bars (making charges on jewellery are taxed at 5%)
- Platinum: Investment-grade platinum products
๐ 5% GST Rate (Merit Goods)
- Personal Care: Hair oil, soap, shampoo, toothpaste
- Food Processing: Many packaged foods such as butter, ghee, biscuits and namkeen
- Basic Clothing: Garments up to โน2,500
- Services: Salon, gym and similar services (without ITC)
๐ 18% GST Rate (Standard Rate)
- Electronics: Mobile phones, laptops, televisions, air conditioners and appliances
- Automobiles: Small cars, motorcycles up to 350cc
- Services: IT, legal, accounting, consulting, banking and telecom services
- Clothing: Garments above โน2,500
๐ซ 40% GST Rate (Sin & Luxury Goods)
- Tobacco Products: Pan masala, cigarettes and similar products (some tobacco items continue at older rates plus cess during the transition)
- Luxury Items: Mid-size and large cars, motorcycles above 350cc, yachts, private aircraft
- Beverages: Aerated and sugar-added drinks
- Entertainment: Betting, casinos and gambling
Note: The 0.25% rate (rough diamonds and precious stones) continues, and 12% or 28% may still appear on older invoices or a few specific items. Always confirm the rate for your HSN/SAC code on the official GST portal.
CGST SGST IGST Calculation Formula
Understanding India’s Dual GST Structure
For Intrastate Transactions (Within Same State)
When buyer and seller are in the same state: CGST (Central GST) = Total GST รท 2 and SGST (State GST) = Total GST รท 2.
Example: On โน1,000 with 18% GST โ Total GST = โน180; CGST = โน90 (Central Government); SGST = โน90 (State Government).
For Interstate Transactions (Different States)
When the buyer and seller are in different states: IGST (Integrated GST) = Total GST Amount.
Example: On โน1,000 with 18% GST โ IGST = โน180 (collected by the Centre and later apportioned to the destination state).
Practical Calculation Examples
Case Study 1: Intrastate Mobile Purchase
- Mobile phone: โน20,000 (GST exclusive), GST rate 18%
- GST amount: โน3,600 โ CGST โน1,800 | SGST โน1,800
- Total amount: โน23,600
Case Study 2: Interstate Service
- IT consulting: โน50,000 (GST exclusive), GST rate 18%
- IGST: โน9,000
- Total amount: โน59,000
Who Can Use This GST Calculator
๐ Business Professionals
- Retailers: Quick price calculation for customer queries
- Wholesalers: Bulk pricing with accurate GST computation
- Service Providers: Professional service billing and quotations
- Manufacturers: Product pricing and cost analysis
๐จโ๐ผ Professional Users
- Chartered Accountants: Client consultation and tax planning
- Tax Consultants: Quick reference during advisory sessions
- Finance and Procurement Teams: Budget planning and vendor cost comparison
๐ฅ Individual Users
- Consumers: Understanding the GST component in purchases
- Freelancers: Service pricing and invoice preparation
- Students: Learning GST concepts with practical examples
Why Use Our GST Calculator 2026
๐ฏ Accuracy You Can Trust
The calculator uses the standard GST formulas, so results match manual calculations exactly for the rate you select.
โฐ Save Valuable Time and Avoid Costly Mistakes
Skip manual working and complex formulas. Incorrect GST can lead to invoice errors and compliance issues โ instant, precise results help you avoid them.
๐ Completely Free Forever
No hidden charges, no signup, no usage limits. Use this GST calculator free, anytime, anywhere โ and learn how GST works from the detailed breakdown.
Frequently Asked Questions
How accurate is this GST calculator?
It uses the official GST formulas, so results are exact for the rate you select. Make sure you choose the correct rate for your HSN/SAC code.
What is the difference between CGST, SGST and IGST?
For a sale within the same state, GST is split equally into CGST (Centre) and SGST (State), or UTGST in Union Territories. For inter-state sales and imports, the full tax is charged as IGST. The total rate is the same either way.
Does it support all GST rates?
Yes. It includes the current slabs 0%, 5%, 18% and 40%, the special rates 0.25% and 3%, and the older 12% and 28% rates that may still appear on some invoices.
How do I calculate GST from an inclusive price?
Select “GST Inclusive (Remove GST)”. The calculator divides the amount by (100 + rate) and multiplies by 100 to find the base price, then subtracts it from the total to get the GST.
Can I use this for business accounting?
Yes. It’s handy for invoicing, quotations and financial planning. For filing returns, always verify figures against your accounting records.
Can I calculate GST for services?
Yes. The calculator works for both goods and services โ just select the rate that applies to your service category.
Start calculating your GST amounts today with this simple, accurate and free GST calculator for India.