GST calculator
Add or remove GST at any rate and see the base value, GST amount and the CGST/SGST split instantly.
CGST and SGST apply to intra-state supply; for inter-state supply the same total is charged as IGST.
How to use
GST calculator lets you add or remove GST at any rate and see the base value, GST amount and the CGST/SGST split instantly. Enter your numbers in the fields and the result updates instantly as you type — no button to press.
It uses standard formulas and shows the result immediately; you can copy any value with one click. It's completely free, with no sign-up, no watermarks and no limits on how often you use it.
Examples
Change any input and every figure recalculates live, so you can compare scenarios in seconds.
Once gST calculator shows your output, use the copy or download button to grab it — no retyping.
Frequently asked questions
Is GST calculator free to use?
Yes. GST calculator is completely free with no sign-up, no watermarks and no usage limits.
Is my data private?
Yes. It uses standard formulas and shows the result immediately; you can copy any value with one click.
Does GST calculator work on mobile?
Yes. It works in any modern browser on desktop, tablet or phone, and keeps working offline once the page has loaded.
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