GST Calculator
Calculate GST easily. Add GST, remove GST, and view CGST / SGST breakdown. Copy, save, share, and view history.
Saved History
Note: GST values are approximate and for general reference only.
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GST Calculator – Add GST, Remove GST & Calculate CGST/SGST Easily
Use this free GST Calculator to quickly calculate GST amount, final price, GST exclusive amount, CGST / SGST split, and percentage-based GST values.
Supports 0%, 5%, 12%, 18%, and 28% GST rates, which are commonly used in India.
Ideal for shoppers, small businesses, freelancers, accountants, and anyone who needs fast and accurate GST calculations.
How to Use This GST Calculator
1. Add GST (GST Inclusive Calculation)
Use this option when you have the base price and want to know:
GST amount
CGST & SGST
Final price after GST
Example:
Base price = ₹1000, GST = 18%
→ GST = ₹180
→ Final price = ₹1180
2. Remove GST (GST Exclusive Calculation)
Use this when you already have the GST-included price and want the base price.
Example:
Final price = ₹1180, GST = 18%
→ Base price = ₹1000
→ GST = ₹180
GST Rates in India
Most products and services fall under one of these GST slabs:
| GST Rate | Common Usage |
|---|---|
| 0% | Essentials, basic food items |
| 5% | Transport, medicines, household essentials |
| 12% | Processed food, electronics parts |
| 18% | Most services, electronics, online services |
| 28% | Luxury items, premium products |
This calculator supports all these GST slab
GST Formulas Used in This Calculator
1. Add GST Formula
GST Amount = Original Price × GST% / 100
Final Price = Original Price + GST Amount
2. Remove GST Formula
Original Price = GST Inclusive Price ÷ (1 + GST% / 100)
GST Amount = GST Inclusive Price – Original Price
3. CGST & SGST Calculation
For standard intra-state transactions:
CGST = GST Amount ÷ 2
SGST = GST Amount ÷ 2
So an 18% GST rate means:
- CGST = 9%
SGST = 9%
GST Calculation Examples
Example 1 – Add GST (18%)
Base Price = ₹2000
GST = 18% → ₹360
Final Price = ₹2360
Example 2 – Remove GST (12%)
Total Bill = ₹1120
Base Price = 1120 ÷ 1.12 = ₹1000
GST = ₹120
Example 3 – CGST/SGST Split
GST amount = ₹180
→ CGST = ₹90
→ SGST = ₹90
Features of This GST Calculator
Add GST
Remove GST
GST-inclusive & exclusive price
CGST/SGST automatic split
Copy result
Save results
Share results
History search & load
Mobile-friendly UI
Fast and error-free
Perfect for business invoices, tax billing, online shopping, e-commerce sellers, and students.
Frequently Asked Questions (FAQ)
What is GST?
GST (Goods and Services Tax) is a unified indirect tax applied on the supply of goods and services in India.
How many types of GST are there?
CGST – Central GST
SGST – State GST
IGST – Integrated GST (interstate transactions)
How is GST calculated?
GST is calculated as a percentage of the base price using:
GST Amount = Base Price × GST% / 100
What is the difference between Add GST and Remove GST?
- Add GST → From base price → find final price
- Remove GST → From final price → find base price
How accurate is this GST Calculator?
It uses the official GST formulas and provides accurate results instantly.
Does the calculator save my GST history?
Yes, all calculations are stored locally in your browser and can be searched or loaded whenever needed.
Can I use decimals?
Yes, you can enter both decimals and whole numbers.
Disclaimer
This GST calculator is for general informational and educational purposes. For official tax filing or legal compliance, consult a certified tax professional or check government GST documentation.