Omnibus

GST Calculator

GST rate — common Indian GST slabs

Net amount

₹1,000.00

GST

₹180.00

Gross amount

₹1,180.00

CGST + SGST

₹90.00 + ₹90.00

  • 100% Free
  • No Sign-Up
  • No Credit Card
  • No Free Trial
  • No Pro Tier
  • No Watermarks

Nothing is uploaded. Just open it and start.

A GST calculator that runs entirely in your browser

Add GST to a net amount or remove it from a tax-inclusive price, at any of the common Indian GST slabs or a custom rate — instantly, with the CGST/SGST split, no sign-up, and nothing uploaded to a server.

Add or remove GST

Work forward from a net amount or back out GST from a tax-inclusive price — switch with one tap.

Common slabs, one tap away

Preset buttons for the 5%, 12%, 18%, and 28% GST Council slabs, plus a custom rate field for anything else.

CGST/SGST split included

See the net amount, total GST, gross amount, and the CGST/SGST split all at once.

100% private

Every calculation happens in your browser. Nothing is uploaded.

Related tools

SIP & Compound Interest Calculator

Project the maturity value of a monthly SIP or a lump-sum investment with compound interest, plus a year-by-year growth breakdown.

Discount Calculator

Work out the sale price and how much you save from a percentage discount — or find the percent off from the original and sale price.

EMI Calculator

Calculate your loan EMI, total interest, and total repayment, with a full amortization schedule.

Percentage Calculator

Calculate a percentage of a number, what percent one value is of another, and percentage increase or decrease — instantly.

Frequently asked questions

How do I add GST to a price?
Choose "Add GST" mode and enter the amount excluding tax. The calculator multiplies it by (1 + rate ÷ 100) to get the gross amount — for example, ₹1,000 at 18% GST becomes ₹1,180, with ₹180 of that as GST.
How do I remove GST from a tax-inclusive price?
Choose "Remove GST" mode and enter the gross (tax-inclusive) amount. The calculator divides it by (1 + rate ÷ 100) to back out the net amount — so ₹1,180 at 18% GST reveals a ₹1,000 net amount and ₹180 of GST, not ₹1,180 × 18%.
What do CGST, SGST, and IGST mean?
For a sale within the same state, GST is split evenly between Central GST (CGST) and State GST (SGST) — each half the total rate. For a sale between two states, the full amount is charged as one Integrated GST (IGST) instead of being split. This calculator shows the CGST/SGST split, which is what you'd apply for an intra-state sale.
Where do the 5%, 12%, 18%, and 28% slabs come from?
Those are the standard GST Council rate slabs used for most goods and services in India. They're offered here as quick presets, but they're not exhaustive — enter any rate in the custom field to override them, and it takes over automatically.
Which currencies can I use?
Toggle between ₹ and $ with the currency switch above the inputs. Every result updates to match, using the digit grouping each currency normally uses.
Is my data stored or uploaded anywhere?
No. Every calculation runs locally in your browser and your last inputs are saved only to this browser's local storage for convenience — nothing is ever sent to a server.
Is the GST calculator really free?
Yes — nothing to pay, nothing to register for, no watermark. The only revenue here is one modest ad slot on the page.
Do I need to create an account?
No. There's no account system at all. Open the page and start typing.