GST Calculator
What is GST?
Goods and Services Tax (GST) is an indirect tax in India that is charged on the sale of goods and services. It was introduced to replace many old taxes and make the tax system easier for everyone. GST started on 1 July 2017. GST is collected in steps.
At every stage—manufacturer, wholesaler, retailer—tax is added only on the value added at that stage. Since GST is a destination-based tax, the tax goes to the state where the product or service is finally used.
GST has five tax slabs:0%, 5%, 12%, 18% and 28%. Some items like petroleum products, alcohol, and electricity are not included under GST. These are taxed separately by State Governments.
Types of GST
- CGST – Central Goods and Services Tax
- SGST – State Goods and Services Tax
- UTGST – Union Territory Goods and Services Tax
- IGST – Integrated Goods and Services Tax
IGST is applied on inter-state transactions, while CGST + SGST are charged on intra-state supplies.
What is a GST Calculator?
A GST calculator is a quick online tool that helps compute GST payable for any transaction. It is useful for buyers, sellers, manufacturers, wholesalers, retailers, and service providers.
How to Calculate GST?
When Price is Exclusive of GST
GST Amount = (Value × GST%) / 100
Final Price = Value + GST Amount
When Price is Inclusive of GST
GST Amount = Value – [Value × {100 / (100 + GST%)}]
GST Calculation Example
| Particulars | Amount (₹) |
|---|---|
| Invoice Value | 100,000 |
| GST @ 18% | 18,000 |
| Total Price | 118,000 |
GST Impact on Manufacturers
| Particulars | Rate (%) | Pre-GST | Under GST |
|---|---|---|---|
| Cost of Product | - | 200,000 | 200,000 |
| Profit | 10% | 20,000 | 20,000 |
| Excise Duty | 12.5% | 27,500 | 0 |
| Total | - | 247,500 | 220,000 |
| VAT | 12.5% | 30,938 | 0 |
| CGST | 9% | 0 | 19,800 |
| SGST | 9% | 0 | 19,800 |
| Final Invoice | - | 278,438 | 259,600 |
GST Impact on Wholesalers & Retailers
| Particulars | Rate (%) | Pre-GST | Under GST |
|---|---|---|---|
| Cost of Product | - | 278,438 | 246,400 |
| Profit | 10% | 27,844 | 24,640 |
| Total | - | 306,282 | 271,040 |
| VAT | 12.5% | 7,347 | 0 |
| CGST | 9% | 0 | 4,593 |
| SGST | 9% | 0 | 4,593 |
| Final Invoice | - | 313,629 | 280,226 |
How to Use a GST Calculator?
- Enter the taxable value of goods or services.
- Select the applicable GST rate (5%, 12%, 18%, etc.).
- Click the Calculate button.
- View CGST, SGST/IGST, and final invoice value.
Components of a GST Calculator
- GST rate selection
- Value of supply input
- Automatic GST calculation
- Clear breakdown of final output
Advantages of a GST Calculator
- Quick gross or net amount calculation
- Accurate CGST, SGST, and IGST bifurcation
- Minimizes human errors
- Saves time and improves accuracy
Frequently Asked Questions
Final Price = Value + GST Amount