Add or remove GST/VAT from any amount in seconds. Get the CGST + SGST vs IGST split for India, and a copy-ready invoice line for your bills. Works worldwide — set any tax rate.
Add GST: total = amount × (1 + rate/100). Remove GST: base = total ÷ (1 + rate/100). For intra-state Indian sales the tax splits equally — 18% becomes 9% CGST + 9% SGST; inter-state sales charge the full 18% as IGST.
GST = base price × rate ÷ 100. For example, 18% on ₹1,000 = ₹180, total ₹1,180. Pick “Add GST” above and enter any rate.
Base = total ÷ (1 + rate ÷ 100). Removing 18% from ₹1,180 gives ₹1,000. Choose “Remove GST” above.
Within one Indian state, GST splits into CGST + SGST (e.g. 18% → 9% + 9%). Between states, the full amount is IGST (18%). This calculator shows both.
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