GST Calculator India
Calculate GST instantly — add or remove GST from any amount. Get CGST, SGST & IGST breakdown for all slabs.
Calculate GST
Enter the base amount (before GST) — GST will be added on top.
₹
Results
Mode: Add GST | Rate: 18%
Base Amount
₹0.00
Pre-GST value
GST Amount
₹0.00
@18%
Total Amount
₹0.00
GST inclusive
Tax Breakdown
CGST
Central GST
₹0.00
@9%
SGST
State GST
₹0.00
@9%
IGST
Integrated GST (inter-state)
₹0.00
@18%
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How GST Calculation Works
➕ Adding GST (Exclusive)
You know the base price (before tax). GST is calculated on top.
GST Amount = Base × Rate ÷ 100
Total = Base + GST Amount
➖ Removing GST (Inclusive)
You know the GST-included price. Find out the base and tax components.
Base = Total × 100 ÷ (100 + Rate)
GST Amount = Total − Base
🏛️ CGST + SGST (Intra-State)
For transactions within the same state, GST is split equally:
CGST = GST Amount ÷ 2 (Central)
SGST = GST Amount ÷ 2 (State)
🔁 IGST (Inter-State)
For transactions across state borders, the full GST is charged as IGST (collected by the Centre).
IGST = Full GST Amount