GST Calculator

Add or remove GST at any rate, with the CGST/SGST/IGST split.

GST Calculator

Fast online calculation engine

Amount / Value 1

Rate / Percentage / Value 2

Tenure / Value 3

Output ResultGross: 110000.00 | Tax: 10000.00

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What does GST Calculator do?

Calculate GST on any amount at 0.25%, 3%, 5%, 12%, 18% or 28%, or a custom rate. Works in both directions — add GST to a net amount, or extract the GST already included in a gross amount — and splits the tax into CGST, SGST and IGST for invoicing.

How to Use GST Calculator

1
Enter the amountEither the net price or the GST-inclusive price.
2
Choose add or removeAdd GST calculates forward; remove GST works backwards.
3
Pick the GST rateTap a standard slab or type a custom percentage.
4
Choose the supply typeIntra-state splits into CGST and SGST; inter-state uses IGST.

Key Features

Add GST to a net price or strip GST out of a GST-inclusive price
One-tap rate buttons for the standard slabs plus a custom rate field
Automatic CGST and SGST split for intra-state supply
IGST shown in full for inter-state supply
Quantity support so you can total a line item straight into an invoice

Frequently Asked Questions

How do I remove GST from a total?

Divide the gross amount by (1 + rate ÷ 100). For ₹1,180 including 18% GST: 1180 ÷ 1.18 = ₹1,000 net, so the GST is ₹180. Simply taking 18% of ₹1,180 gives ₹212.40, which is wrong.

What is the difference between CGST, SGST and IGST?

For a supply within one state the tax is split evenly between Central GST and State GST — 18% becomes 9% CGST plus 9% SGST. For a supply between states the whole 18% is charged as Integrated GST.

What are the standard GST rates in India?

The main slabs are 5%, 12%, 18% and 28%, with 0.25% and 3% used for rough gemstones and gold. Rates are revised by the GST Council, so confirm the current rate for your HSN or SAC code before invoicing.