# GST Calculator

Enter an amount and the GST rate. Choose whether to add GST to a price or work backwards from a price that already includes GST.

Live calculator: https://calc.softool.in/gst-calculator

## Worked example

Adding 18% GST to ₹1,000 gives ₹1,180. The GST is ₹180, split into ₹90 CGST and ₹90 SGST. Removing 18% GST from ₹1,180 gives back ₹1,000.

## Quick answers

- **What is ₹100 plus 18% GST?** ₹100 plus 18% GST comes to ₹118.
- **What is ₹500 plus 18% GST?** ₹500 plus 18% GST comes to ₹590.
- **What is ₹1,000 plus 18% GST?** ₹1,000 plus 18% GST comes to ₹1,180.
- **What is ₹5,000 plus 18% GST?** ₹5,000 plus 18% GST comes to ₹5,900.
- **What is ₹10,000 plus 18% GST?** ₹10,000 plus 18% GST comes to ₹11,800.
- **What is ₹50,000 plus 18% GST?** ₹50,000 plus 18% GST comes to ₹59,000.

## GST table: price including GST

Final price after adding GST at common rates.

| Price before GST | 5% GST | 18% GST | 40% GST |
|---|---|---|---|
| ₹100 | ₹105 | ₹118 | ₹140 |
| ₹500 | ₹525 | ₹590 | ₹700 |
| ₹1,000 | ₹1,050 | ₹1,180 | ₹1,400 |
| ₹5,000 | ₹5,250 | ₹5,900 | ₹7,000 |
| ₹10,000 | ₹10,500 | ₹11,800 | ₹14,000 |
| ₹50,000 | ₹52,500 | ₹59,000 | ₹70,000 |

## How it is calculated

`GST = price × rate ÷ 100    |    Price before GST = inclusive price ÷ (1 + rate ÷ 100)`

To add GST, multiply the price by the rate. To remove GST from an inclusive price, divide by (1 + rate ÷ 100) to get the original price; the difference is the GST.

For a sale within one state the GST is split equally into CGST and SGST. For a sale between states the whole amount is charged as IGST. GST rates differ by product and service and are changed from time to time, so confirm the current rate for your item.

## Good to know

- Check whether a quoted price includes GST before comparing two quotes.
- For a sale inside your state, split the GST equally into CGST and SGST on the invoice.
- Rates differ by item. Confirm the rate for your product or service before invoicing.

## Common questions

### What are CGST, SGST and IGST?

CGST goes to the central government and SGST to the state government; both apply to sales inside one state, each at half the GST rate. IGST applies to sales between states at the full rate.

### How do I remove GST from an MRP?

Choose "Remove GST from amount", enter the MRP and the GST rate. The calculator shows the price before tax and the GST included in it.

### How do I calculate GST on a discounted price?

Apply the discount first, then charge GST on the reduced price.

### What is the difference between GST-inclusive and GST-exclusive prices?

An exclusive price has GST added on top. An inclusive price already contains the GST, so you divide to find the tax inside it.

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Source: https://calc.softool.in/gst-calculator
Last reviewed: October 2026. Results are estimates, not financial advice.