Free GST Calculator Online
Calculate GST instantly with our free online GST calculator. Supports CGST, SGST, IGST, and all standard GST rates in India. Works on all devices.
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All rates supported
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GST Calculator
Exclusive: Amount excludes GST | Inclusive: Amount includes GST
Results
Base Amount
₹1,000.00
CGST (9%)
₹90.00
SGST (9%)
₹90.00
Total Tax
₹180.00
Final Amount
₹1,180.00
No signup required • 100% Free
Most Used GST Rates in India
Quick calculators for the most common GST rates
Need a Specific Rate?
Our calculator supports any GST rate. Enter your custom rate above to calculate instantly.
Popular GST Calculations
Common GST calculations for quick reference
18% GST on ₹1,000
5% GST on ₹500
28% GST on ₹10,000
Want to Calculate Your Amount?
Use our interactive calculator above to calculate GST for any amount and rate.
Start CalculatingWhat is a GST Calculator?
A GST calculator is a free online tool that helps you instantly calculate the Goods and Services Tax (GST) on any amount. It supports all GST types used in India including CGST, SGST, and IGST.
Whether you need to calculate 18% GST, 28% GST, or any other rate, our calculator provides instant results with a complete breakdown of tax components.
It's designed for businesses, freelancers, accountants, and anyone who needs to calculate GST quickly and accurately without complex formulas.
Perfect for:
- Invoice creation
- Quotation pricing
- Tax calculations
- Price estimation
- Accounting
How to Calculate GST?
Exclusive GST Formula
GST = Amount × (Rate ÷ 100)
Final = Amount + GST
Example: For ₹1000 with 18% GST
GST = 1000 × (18 ÷ 100) = ₹180
Final = 1000 + 180 = ₹1180
Inclusive GST Formula
GST = Amount × (Rate ÷ (100 + Rate))
Base = Amount - GST
Example: For ₹1180 with 18% GST
GST = 1180 × (18 ÷ 118) = ₹180
Base = 1180 - 180 = ₹1000
GST Slabs in India
India has implemented a multi-tiered GST system with different rates applicable to different types of goods and services. Understanding these slabs is crucial for accurate tax calculation.
5% GST
Essential Goods & Services
- • Essential food items
- • Basic medicines
- • Educational services
- • Healthcare services
12% GST
Standard Goods & Services
- • Semi-luxury goods
- • Most services
- • Industrial machinery
- • Packaged food
18% GST
Most Common Rate
- • Most goods
- • Professional services
- • Restaurants
- • Hospitality
28% GST
Luxury Items
- • Luxury cars
- • Amusement services
- • High-end goods
- • Premium cosmetics
0% GST: Certain items like unpackaged food, newspapers, and specific exports are zero-rated.
Understanding CGST, SGST & IGST
CGST
Central Goods & Services Tax
- ✓ Collected by central government
- ✓ Intra-state transactions
- ✓ 50% of total GST
- ✓ For 18% GST: 9% CGST
SGST
State Goods & Services Tax
- ✓ Collected by state government
- ✓ Intra-state transactions
- ✓ 50% of total GST
- ✓ For 18% GST: 9% SGST
IGST
Integrated Goods & Services Tax
- ✓ Collected by central government
- ✓ Inter-state transactions
- ✓ 100% of total GST rate
- ✓ For 18% GST: 18% IGST
Key Difference: CGST + SGST is used when both buyer and seller are in the same state (intra-state). IGST is used when they are in different states (inter-state).
Frequently Asked Questions
Can I calculate different GST rates?
Yes! Our calculator supports all GST rates including 0%, 5%, 12%, 18%, 28%, and custom rates. Simply enter the rate you need.
What's the difference between CGST and IGST?
CGST+SGST is used for intra-state sales (within the same state), while IGST is used for inter-state sales. CGST and SGST are equal halves of the total rate, while IGST is the full rate.
Can I use this for invoicing?
Absolutely! Calculate the GST with our tool, then use the amount in your invoices. You can also create GST-compliant invoices directly using our invoice generator.
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Ready to Calculate GST?
Start using our calculator now or create GST invoices instantly