GST Calculator
Add or remove GST from any amount — all slabs supported
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GST Breakdown
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Base Amount
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GST Amount
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Total Amount
Detailed Breakdown
Original Amount₹0
GST Rate0%
CGST (50%)₹0
SGST (50%)₹0
Total GST₹0
Final Amount (with GST)₹0
GST Slabs in India
GST Calculator — Add or Remove GST Online
GST (Goods and Services Tax) is India's unified indirect tax levied on supply of goods and services. Our free GST calculator instantly calculates the GST amount and total price for any slab rate.
How to Add GST
If you have a base price and want to find the total price including GST:
GST Amount = Base Price × GST Rate / 100
Total Price = Base Price + GST Amount
How to Remove GST (Reverse Calculation)
If you have a GST-inclusive price and want to find the base price:
Base Price = Total Price × 100 / (100 + GST Rate)
GST Amount = Total Price − Base Price
CGST vs SGST vs IGST
- CGST + SGST: Applied on intra-state (within same state) transactions, each at half the GST rate.
- IGST: Applied on inter-state (between states) transactions, at the full GST rate.
More Free Calculators
Worked Example
Two common GST scenarios solved step by step.
Example 1: Add GST — ₹5,000 product at 18% GST
| Base Price | ₹5,000 |
| GST Rate | 18% |
| GST Amount (5000 × 18/100) | ₹900 |
| CGST (9%) | ₹450 |
| SGST (9%) | ₹450 |
| Total Price | ₹5,900 |
Example 2: Remove GST — Bill shows ₹11,800 inclusive of 18% GST
| GST-Inclusive Price | ₹11,800 |
| Formula: 11800 × 100 / 118 | — |
| Base Price (ex-GST) | ₹10,000 |
| GST Paid | ₹1,800 |
Switch to "Remove GST" mode in the calculator above and enter ₹11,800 to verify.
Frequently Asked Questions