GST Calculator — Free Online Tool

How to Use GST Calculator Online

1. Step 1: Enter Amount & GST Slab — Input your transaction amount (₹) and choose a standard GST slab (5%, 12%, 18%, 28%) or custom percentage.
2. Step 2: Select Inclusive or Exclusive Mode — Choose "GST Exclusive" to add tax to a base amount, or "GST Inclusive" to extract existing tax from a gross total.
3. Step 3: View CGST/SGST/IGST & Copy — Get exact base price, intra-state CGST + SGST (50/50 split) or inter-state IGST with mathematical derivation.

Why Use PDFly XO for GST Calculator?

• 100% Client-Side Privacy: All file processing is performed locally in your web browser. Your private documents are never uploaded to any remote server.
• Zero Wait Time: Local WebAssembly execution ensures near-instant document processing without file size upload latency.
• Free & Unlimited: Complete access with no subscriptions, watermarks, or hidden paywalls.

Frequently Asked Questions

What is the difference between GST Inclusive and Exclusive?

GST Exclusive adds tax on top of a net base amount (Base + 18% Tax = Total). GST Inclusive extracts the hidden tax component from a gross total (Total ÷ 1.18 = Base).

How does the calculator handle Intra-state vs Inter-state supply?

For intra-state transactions (within the same state), GST is split equally into CGST and SGST (e.g., 9% + 9%). For inter-state transactions, full 18% is allocated to IGST.

Are these calculations compliant with official CBIC GST rules?

Yes. All formulas follow statutory CBIC guidelines and provide transparent step-by-step arithmetic proofs.

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