GST Calculator India
Calculate CGST, SGST, and IGST instantly. Add or remove GST from any amount with accurate breakdowns for all GST rates.
Calculate GST Amount
How to Use the GST Calculator
Enter the Amount
Type the original amount or GST-inclusive amount in the input field.
Select GST Rate
Choose the applicable GST rate from the available options: 3%, 5%, 12%, 18%, or 28%.
Choose Calculation Type
Select whether you want to add GST to the amount (Exclusive) or remove GST from it (Inclusive).
Select Tax Type
Choose Intra-State for CGST + SGST or Inter-State for IGST based on your transaction type.
Click Calculate
Press the Calculate GST button to see the detailed breakdown instantly.
View Results
Review the GST amount, net price, total price, and CGST/SGST/IGST split in the results.
Key Features of This GST Calculator
All Indian GST Rates
Supports 3%, 5%, 12%, 18%, 28% rates plus custom rate entry for special categories.
Add or Remove GST
Calculate GST-exclusive (add tax) or GST-inclusive (extract tax) amounts in one click.
CGST/SGST/IGST Split
Automatic breakdown of tax into CGST + SGST for intra-state or IGST for inter-state transactions.
Invoice-Ready Summary
Detailed table summary with all values formatted and ready for invoicing use.
100% Private
All calculations run in your browser. No financial data is ever sent to any server.
Mobile Friendly
Fully responsive design works perfectly on smartphones, tablets, and desktops.
GST Calculation Formulas
GST Exclusive (Adding GST to Base Price)
GST Amount = Base Price × (GST Rate ÷ 100)
Total Price = Base Price + GST Amount
For intra-state: CGST = SGST = GST Amount ÷ 2
For inter-state: IGST = GST Amount
GST Inclusive (Removing GST from Total Price)
Base Price = Total Price ÷ (1 + GST Rate ÷ 100)
GST Amount = Total Price − Base Price
For intra-state: CGST = SGST = GST Amount ÷ 2
For inter-state: IGST = GST Amount
Understanding GST Rates in India
3% — Gold, silver, and precious stones
5% — Essential items like packaged food, footwear under ₹500, transport services
12% — Processed foods, business class air tickets, cell phones
18% — Most goods and services including IT, restaurants, financial services
28% — Luxury items, automobiles, tobacco, aerated drinks
Practical GST Calculation Examples
🇮🇳 Freelance Web Developer in Bengaluru (18% GST)
A web developer bills a client in the same state ₹50,000 for a project. Using GST Exclusive at 18%:
GST Amount: ₹50,000 × 18% = ₹9,000
CGST: ₹4,500 | SGST: ₹4,500
Total Invoice: ₹59,000
🇮🇳 Electronics Purchase in Delhi (28% GST Inclusive)
A consumer buys a washing machine priced at ₹35,400 (inclusive of 28% GST). Using GST Inclusive:
Base Price: ₹35,400 ÷ 1.28 = ₹27,656.25
GST Amount: ₹7,743.75
CGST: ₹3,871.88 | SGST: ₹3,871.88
🇮🇳 Inter-State Textile Sale from Gujarat to Maharashtra (5% IGST)
A textile manufacturer in Surat sells fabric worth ₹2,00,000 to a buyer in Mumbai. Since it is inter-state:
GST Amount: ₹2,00,000 × 5% = ₹10,000
IGST: ₹10,000 (full amount as single tax)
Total Invoice: ₹2,10,000
🌍 International SaaS Company Billing Indian Clients (18% GST)
A SaaS company registered in India charges ₹15,000/month. For an intra-state client at 18%:
GST Amount: ₹15,000 × 18% = ₹2,700
CGST: ₹1,350 | SGST: ₹1,350
Total Monthly Bill: ₹17,700
What Is GST and How Does This Calculator Help?
GST (Goods and Services Tax) is India's comprehensive indirect tax that replaced multiple cascading taxes like VAT, Service Tax, and Excise Duty on 1st July 2017. It follows a dual structure where the Central Government levies CGST and State Governments levy SGST on intra-state supplies, while IGST applies to inter-state supplies.
For businesses, freelancers, and consumers, calculating GST accurately is essential for invoicing, tax filing, and understanding the true cost of goods and services. Whether you are a small business owner in Jaipur preparing GST invoices or a chartered accountant in Chennai verifying tax calculations, this GST calculator provides instant, accurate results.
The calculator handles both GST-exclusive calculations (when you know the base price and need to add tax) and GST-inclusive calculations (when you have the final price and need to extract the tax component). It supports all five standard GST rate slabs used in India.
📖 Complete Guide to GST Calculation
Read our detailed blog post on GST calculation methods, rate structures, input tax credit, and practical examples for Indian businesses.
Read the Full Guide →Frequently Asked Questions
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