GST Calculator Online, Add or Remove GST

BotixTech's free GST calculator adds or removes Goods and Services Tax from any amount in one click. See the complete breakup - CGST, SGST and total tax - instantly.

Whether you are a shopkeeper pricing products, a freelancer making invoices, or just checking a bill, our GST calculator online tool gives exact numbers with no signup.

How to Calculate GST

Enter the amount - the price before or after tax.
Select the GST rate - 5%, 12%, 18%, 28% or a custom rate.
Choose add or remove - add GST to a base price, or extract it from a total.
See the breakup - net amount, GST, CGST/SGST split and total.

GST Calculator Features

Add or remove - works both directions.
Full breakup - CGST and SGST shown separately.
Custom rates - any percentage you need.
Free - no signup, unlimited calculations.

Frequently Asked Questions

How do I add 18% GST to 1000?

Select Add GST, enter 1000 and 18%. Total becomes 1180, with 180 GST (90 CGST + 90 SGST).

How do I remove GST from a total?

Select Remove GST and enter the tax-inclusive amount. The tool extracts the base price and tax paid.

What is CGST and SGST?

GST is split equally between central (CGST) and state (SGST) governments for sales within a state. 18% GST means 9% CGST + 9% SGST.

What are the GST slabs?

The main slabs since 22 September 2025 are 0%, 5%, 18% and 40%. Older 12% and 28% rates can still be checked with the custom rate option.

GST Calculator

How to Calculate GST

GST Calculator Features

Frequently Asked Questions

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