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🧮 Everyday Calculators

GST Calculator

Add or remove GST at 5%, 12%, 18% or 28% with CGST/SGST split. Free, instant and private — no sign-up required.

Total with GST
Base amount
GST amount
CGST / SGST
FormulaGST = Amount × Rate ÷ 100 · Base (from inclusive) = Amount × 100 ÷ (100 + Rate)