Finance
GST Calculator
Add or remove GST from any amount, at any standard rate — instant result as you type.
Total (incl. GST)
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Frequently asked questions
How do I add GST to an amount?
Multiply the amount by the GST rate divided by 100 to get the tax, then add it to the original amount. For example, ₹1,000 at 18% GST adds ₹180, for a total of ₹1,180. Use the "Add GST" tab above.
How do I remove GST from a total amount?
Divide the total by (1 + rate/100) to get the base amount, then subtract that from the total to find the GST portion. Use the "Remove GST" tab — useful when a price already includes tax and you need to know the pre-tax value.
What are the standard GST rates?
India's GST system uses four main slabs — 5%, 12%, 18%, and 28% — depending on the category of goods or services. This calculator includes all four as quick-select options.