GST Calculator

Add GST to a price or extract GST from an inclusive price. Supports 0.25%, 3%, 5%, 12%, 18%, 28% and custom rates with CGST, SGST and IGST breakup. Works for VAT and sales tax too.

Amount

GST rate

Custom rate (%)

Add GST (exclusive) Remove GST (inclusive)

Formulas

Add GST: GST = amount × rate ÷ 100; total = amount + GST
Remove GST (inclusive price): base = amount × 100 ÷ (100 + rate); GST = amount − base

CGST, SGST and IGST

For sales within the same Indian state, GST is split equally into CGST and SGST (e.g. 18% = 9% + 9%). For sales between states, the full rate is charged as IGST.

Outside India? The same maths works for VAT or sales tax — just pick or type your rate.

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