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© 2026 ToolsToIndia. All calculations are estimates — verify with an official source before relying on them.

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  1. Home
  2. Tax
  3. GST Calculator
Tax

GST Calculator

Add or remove GST from any amount at 5%, 12%, 18%, or 28%.

Enter your values below — results update instantly as you type.

GST rate
Base amount
₹10,000
GST (18%)
₹1,800
Total
₹11,800
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Formula used

GST amount = Base amount × (GST rate / 100). Amount including GST = Base amount + GST amount.

How to use this gst calculator

  1. Enter your values in the fields above — results update instantly as you type.
  2. Adjust any figure to see how it changes the outcome.
  3. Use Share, Copy, or Print to save your result for later.

Tips

  • CGST + SGST together equal the total GST rate for intra-state sales; IGST equals the full rate for inter-state sales.
  • Always check whether a quoted price is inclusive or exclusive of GST before comparing vendors.

Common mistakes

  • Applying GST twice by adding it to a price that already includes it.
  • Using the wrong slab because the product's HSN code changed rate in a recent notification.

Frequently asked questions

Switch to 'Remove GST' mode — this divides the total by (1 + rate/100) to recover the base price.

Related tools

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GST Rate Finder

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Look up the GST rate for a product or service.

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GST HSN Search

Coming soon

Search HSN/SAC codes for GST filing.

Notify me →