GST Calculator: Add or Remove GST Instantly

Need to add GST to a price or strip it out of one? This calculator does both in a click.

What is it?

GST is an indirect tax on goods and services. Within a state it splits equally into CGST and SGST.

How is it calculated?

To add GST: GST = amount × rate ÷ 100. To remove it: base = amount × 100 ÷ (100 + rate).

Example

Adding 18% GST to ₹10,000 gives ₹1,800 GST and ₹11,800 total (CGST ₹900 + SGST ₹900).

Key things to know

• Inter-state sales attract IGST instead of CGST+SGST.
• The correct rate depends on the item (5/12/18/28%).
• Show CGST and SGST separately on invoices.
• Use the reverse calculation to find the pre-tax price.

Frequently asked questions

What are CGST and SGST?
The equal split of GST within a single state.

When does IGST apply?
On sales across state borders.

How do I pick the rate?
By the goods or service category.

Disclaimer: This article is for general information only and is not financial or tax advice. Consult a qualified advisor before making investment or tax decisions.