Add GST to a price or extract GST from an inclusive amount — with an instant CGST/SGST or IGST breakup for invoices.
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GST Calculator
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Main GST slabs after the Sept 2025 GST 2.0 reform: 5% and 18%, with 40% for luxury/sin goods. 3% applies to gold & silver, 0.25% to rough diamonds.
GST formulas
- Add GST: GST = Amount × Rate ÷ 100; Total = Amount + GST
- Remove GST: Net = Amount ÷ (1 + Rate ÷ 100); GST = Amount − Net
- Within state: GST is split equally into CGST and SGST
- Inter-state: full GST is charged as IGST
Frequently asked questions
What are the GST rates now?
After the GST 2.0 reform effective 22 September 2025, most goods and services fall under 5% or 18%. A 40% rate applies to luxury and sin goods. Gold and silver attract 3%.
What is the difference between CGST, SGST and IGST?
For sales within the same state, GST is split equally between the Centre (CGST) and the State (SGST). For inter-state sales, the full amount is IGST.
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