What is the GST Calculator?
GST (Goods and Services Tax) applies at different rates — 5%, 12%, 18% or 28% — depending on the product or service. This calculator handles both directions: add GST to a base price to get the final invoice amount, or extract the base price and GST portion from a price that already includes tax — a common need when a vendor only quotes the "final" price.
How to Use This Tool
- Choose Add GST (you have the base price) or Remove GST (you have the final, tax-included price).
- Enter the amount and pick the GST rate — 5%, 12%, 18%, 28%, or a custom rate.
- The base amount, GST amount and total update instantly.
Frequently Asked Questions
What is the difference between Add GST and Remove GST?
"Add GST" calculates the final price when GST is added to a base amount. "Remove GST" extracts the base amount and GST portion from a GST-inclusive price.
What GST rates are available?
5%, 12%, 18% and 28% — the standard GST slabs in India, plus a custom rate option.
Last updated: August 2026