GST Calculator India – Taxable Value, GST & Invoice Amount (CGST/SGST/IGST)

1. What do you know?

2. Enter GST amount

₹

3. GST rate

Custom rate % Show old rates (12%, 28%)

4. Type of supply

Result

Formulas used

From GST amount: Taxable = GST × 100 ÷ Rate, Invoice = Taxable + GST
From taxable value: GST = Taxable × Rate ÷ 100, Invoice = Taxable + GST
From invoice total (GST-inclusive): Taxable = Invoice × 100 ÷ (100 + Rate), GST = Invoice − Taxable
Split: same-state supply → CGST = SGST = GST ÷ 2; other-state supply → IGST = GST.
Amounts are rounded to the nearest paisa. Shown values always add up exactly.

For estimation only. GST rates and exemptions depend on the HSN/SAC code and change by notification — always confirm the rate on the CBIC / GST portal or with your CA before filing returns or issuing invoices.