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GST calculator: add or remove GST
18% GST on ₹1,00,000 is ₹18,000 (CGST ₹9,000 + SGST ₹9,000), total ₹1,18,000. Switch to “including GST” to work backwards from an invoice total. Rates after the September 2025 GST 2.0 reform: 5% and 18% for most goods, 40% for luxury and sin goods (the old 12% and 28% slabs are kept for reference).
Your numbers
Result
Total with GST
Amount before GST
GST
CGST = SGST
| GST rate | Amount before GST | GST | Total with GST |
|---|
Ready answers
5% on ₹1,0005% on ₹5,0005% on ₹10,0005% on ₹25,0005% on ₹50,0005% on ₹1,00,00018% on ₹1,00018% on ₹5,00018% on ₹10,00018% on ₹25,00018% on ₹50,00018% on ₹1,00,000
Frequently asked
How do I remove GST from a total?
Divide the inclusive amount by (1 + rate): ₹1,18,000 ÷ 1.18 = ₹1,00,000 base and ₹18,000 GST. The calculator does this in “including GST” mode.
What are CGST, SGST and IGST?
Within a state the GST splits equally into CGST (centre) and SGST (state); between states the whole amount is IGST. The total is the same either way.