GST Calculator

Calculate GST, see CGST/SGST split, and get instant totals for invoices, HSN, and due-date work.

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Calculation Mode

Transaction Type

Original Amount (excl. GST)Enter base (excl. GST)

₹

GST Rate

Quantity / UnitsMultiply for multi-unit invoices

🧾 How GST is split

Intra-state: GST = CGST (Central) + SGST (State), each at half rate.
Inter-state: Full GST as IGST goes to Centre, later apportioned.

Total Payable (incl. GST)

₹11,800.00

GST @ 18% = ₹1,800.00

GST%

18%

Base Amount

₹10,000.00

Total GST

₹1,800.00

Grand Total

₹11,800.00

Tax Breakdown

Base Amount₹10,000.00

CGST @ 9%₹900.00

SGST @ 9%₹900.00

Total GST₹1,800.00

Grand Total₹11,800.00

GST amount on your base across all slabs

At 18% slab: Base ₹10,000.00 → Total ₹11,800.00