GST Calculator

Calculate inclusive or exclusive GST and tax split.

Privacy: Calculations and drafts stay on this device unless you explicitly enable account sync.

GST inputs

Choose inclusive for an amount that already contains GST, or exclusive to add GST.

Amount (INR)

GST rate

exclusiveinclusive

Interstate supply (IGST instead of CGST/SGST)

GST breakdown

Net

₹1,000.00

GST

₹180.00

CGST

₹90.00

SGST

₹90.00

IGST

₹0.00

Gross

₹1,180.00

Calculation aid only. Verify tax treatment and invoicing obligations with a qualified professional.

Support

What this tool does

Calculate tax-inclusive or tax-exclusive amounts using an entered rate.

How to use it

Choose inclusive or exclusive mode, enter the amount and rate, and select the applicable split display.

Worked example

At an illustrative 18%, 100 exclusive becomes 118 total. For 118 inclusive, base is 100 and tax is 18.

Limitations and checks

This arithmetic does not determine the legal rate, exemptions, registration or place of supply. Enter the rate applicable to the actual transaction.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

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