Enter an amount and GST rate below to add GST or extract the GST already included. Everything runs in your browser — nothing you enter here is sent to our server.
Calculated locally in your browser — nothing is sent to our server.
How This Calculator Works
Choose whether your amount already includes GST or not. If it excludes GST, this tool adds GST on top: GST = Amount × Rate / 100. If it already includes GST, this tool extracts the tax already built into the price: Base = Amount / (1 + Rate/100), then GST = Amount − Base — the standard back-calculation for tax-inclusive pricing.
FAQ
What are the standard GST rates in India?
The common slabs are 5%, 12%, 18%, and 28%, though the exact rate depends on the specific goods or service — check the applicable rate for your item before calculating.
Does this split GST into CGST and SGST?
No — this shows the combined GST amount. For an intra-state transaction, that total is typically split equally into CGST and SGST (half each); for an inter-state transaction, it’s charged in full as IGST.
Is my data uploaded anywhere?
No. The calculation happens entirely in your browser. Nothing you enter here is sent to our server.