GST Calculator

Add or remove GST with CGST/SGST split

₹10,000
₹

Add: amount is base. Remove: amount includes GST.

Total Amount
₹11,800
+₹1,800 GST component
Base Amount₹10,000
CGST₹900
SGST₹900
Total₹11,800
What this means for you
Intra-state transactions split GST into CGST (Centre) + SGST (State). Inter-state goes fully as IGST.
What to do next
Profit margin calculator
HSN/SAC codes may have specific rates.
Per CBIC notifications, GST Act 2017
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Formula & SourceGST Calculator
Add GST (exclusive):
  GST = Amount × Rate / 100
  Total = Amount + GST

Remove GST (inclusive):
  Base = Amount / (1 + Rate/100)
  GST = Amount − Base

Intra-state: CGST = SGST = GST / 2
Inter-state: IGST = GST (full)
Source: CBIC, GST Acts 2017

Frequently Asked Questions

IGST: different states. CGST+SGST: same state (split equally).
All formulas are verified against the original government notification or Act (cited in the source line below the result). Numbers update in under a second on any input change, with no rounding-of-thousands like some competitors. For tax, slabs are sourced from the current Finance Act; for small savings, rates come from the quarterly government notification.
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Yes — every calculator is verified for FY 2026-27 (post Finance Act 2025). The "Last reviewed" stamp at the bottom of every page tells you when the math was last re-checked. If you spot an out-of-date number, write to us at /contact.