# GST Calculator

> Add GST to a price or take it out, with the CGST, SGST and IGST split for your invoice.

- Page: https://www.brandbakery.tech/tools/gst-calculator
- Last updated: 2026-10-07

Breadcrumb: [Home](https://www.brandbakery.tech/) > [Tools](https://www.brandbakery.tech/tools) > GST Calculator

Add GST to a price or work back from a GST-inclusive total at 0, 0.25, 3, 5, 18 or 40%. See the taxable value, the tax, and the CGST and SGST or IGST split.

## Use it

Open the tool in a browser at https://www.brandbakery.tech/tools/gst-calculator. It is free and needs no signup.

## Use it from code

Add GST to an amount or take it out of a GST-inclusive one, with the CGST and SGST (same state) or IGST (another state) split.

`POST https://www.brandbakery.tech/api/tools/gst_calc` with a JSON body, or call the `gst_calc` tool on the [MCP server](https://www.brandbakery.tech/mcp).

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `amount` | number | yes | The amount in rupees. |
| `ratePercent` | number | yes | GST rate, e.g. 5, 18 or 40. |
| `mode` | string | no | "add" if the amount is before GST, "remove" if it already includes GST. One of: add, remove. |
| `supply` | string | no | "intra" for a buyer in the same state (CGST + SGST), "inter" for another state (IGST). One of: intra, inter. |

## Related tools

- [Missed Enquiry Cost Calculator](https://www.brandbakery.tech/tools/missed-enquiry-cost): See how much revenue walks away each month from calls, chats and forms nobody answers in time.
- [Ad Budget Planner](https://www.brandbakery.tech/tools/ad-budget-planner): Find out how many leads and customers your ad budget buys, and whether it pays for itself.
- [WhatsApp API Cost Calculator](https://www.brandbakery.tech/tools/whatsapp-api-cost): Work out what Meta charges each month for your WhatsApp Business API messages to Indian customers.
- [Google Review Request Kit](https://www.brandbakery.tech/tools/review-request-kit): Write a polite review request, send it on WhatsApp in one tap, and print a QR code for your counter.

Category: [Leads & sales](https://www.brandbakery.tech/tools/category/sales)

---

Brand Bakery is a design-first digital studio in New Delhi. Start an enquiry at https://www.brandbakery.tech/contact or email support@brandbakery.tech. This is the Markdown copy of https://www.brandbakery.tech/tools/gst-calculator; the site index for language models is https://www.brandbakery.tech/llms.txt.