GST Calculator

Add or remove GST from any amount. Supports all GST slabs with CGST/SGST breakdown.

Final Amount (Incl. GST)

0.00

@ 18% GST (9% CGST + 9% SGST)

Base Amount

GST

Final Amount

Base Amount

CGST (9%)

SGST (9%)

Total GST

Amount Breakdown

Documentation

Understanding GST

GST (Goods and Services Tax) is split equally between CGST (Central) and SGST (State) for intra-state transactions. For inter-state, IGST applies at the full rate.

GST Slabs

5% (essential goods), 12% (standard), 18% (most services), 28% (luxury/sin goods)

The Formula

GST Amount = Base × (Rate / 100)
Base = Inclusive ÷ (1 + Rate/100)

CGST = SGST = GST Amount ÷ 2

Last Updated: January 2026

Disclaimer: This calculator provides estimates for educational purposes. Always verify GST rates for specific goods/services.

How to Use

About the GST Calculator

What it calculates

This gst calculator helps you model financial decisions with accurate formulas and clear outputs. Calculate GST inclusive or exclusive amounts easily.

When to use it

Use when comparing loan terms, investment returns, taxes, or savings scenarios before making money decisions.

Example

Adjust the inputs above to model your specific scenario with the GST Calculator.

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