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GST Calculator

Add or remove GST (Indian rates)

Total amount
₹1,180
₹1,000
Base amount
₹180
GST amount
₹90
CGST
₹90
SGST
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About GST Calculator

Indian GST maths trips everyone: is the quoted price inclusive or exclusive? Which slab applies — 5%, 12%, 18% or 28%? How do CGST and SGST split on an intra-state sale? This calculator answers all three instantly, showing the tax break-up line by line.

Whether you are a freelancer raising invoices, a shopkeeper verifying a bill, or a buyer checking a quoted price, the tool gives you exact figures with a clear CGST/SGST/IGST breakdown — computed locally, no data submitted.

Part of Toolverse's Calculators collection, this page also connects you to related tools so you can finish the whole job without hunting across the internet. Bookmark /tool/gst-calculator and your next gst calculator task takes ten seconds.

Part of Toolverse's Calculators collection, this page also connects you to related tools so you can finish the whole job without hunting across the internet. Bookmark /tool/gst-calculator and your next gst calculator task takes ten seconds.

Key Features

  • check_circleAdd or remove GST (Indian rates) — in seconds, right in your browser
  • check_circleNo signup, no installation, no watermark
  • check_circle100% private — files and data processed locally, never uploaded
  • check_circleWorks on desktop and mobile browsers
  • check_circleFree and unlimited — ad-supported, never paywalled
  • check_circleWorks offline once the page has loaded

How to Use

  1. 1

    Open the tool

    Load this page — GST Calculator starts instantly, no signup or download needed.

  2. 2

    Provide your input

    Enter your input — text, numbers or options — depending on the task.

  3. 3

    Get the result

    The tool processes instantly and shows the output, with options to adjust as needed.

  4. 4

    Download or copy

    Save the result to your device or copy it to the clipboard. Done — in under a minute.

Frequently Asked Questions

How do I remove GST from an inclusive price?

Divide the GST-inclusive amount by (1 + rate/100). For ₹1,180 inclusive of 18% GST: 1180 ÷ 1.18 = ₹1,000 base price and ₹180 tax.

What is the difference between CGST, SGST and IGST?

Intra-state sales split GST equally into CGST (Central) and SGST (State). Inter-state sales charge IGST at the full rate instead.

Which GST rate applies to my product?

Goods and services fall into 0%, 5%, 12%, 18% and 28% slabs. The calculator lets you pick any rate, including custom ones, so you can match your item's notified slab.

Is this calculator free for business use?

Yes — use it for invoices, quotes and verification at no cost. For filing returns, always reconcile with your accountant and GST portal data.