What are the current GST slabs in India?

India has 4 main GST slabs: 5% (essential items like food grains), 12% (processed food, computers), 18% (most goods and services, IT services), and 28% (luxury items like cars, tobacco). Some items are exempt (0%).

What is the difference between CGST, SGST, and IGST?

CGST (Central GST) and SGST (State GST) apply to intra-state transactions — each is half the total GST rate. IGST (Integrated GST) applies to inter-state transactions and equals the full GST rate.

When do I use Add GST vs Remove GST?

Use 'Add GST' when your quoted price doesn't include tax (exclusive) — the calculator adds GST on top. Use 'Remove GST' when your price already includes tax (inclusive) — the calculator extracts the base amount and GST portion.

Is this GST calculator free to use?

Yes, this GST calculator is 100% free with no sign-up required. You get 5 free uses per day. Sign up for unlimited access.

GST Calculator

Calculate GST instantly for any amount. Supports all GST slabs (5%, 12%, 18%, 28%).

100% Free No signup required Data stays in your browser

How It Works

1
Enter the amount in rupees that you want to calculate GST on.
2
Select the GST rate slab — 0%, 5%, 12%, 18%, or 28%.
3
Choose whether to Add GST (exclusive) or Remove GST (inclusive).
4
Optionally enter an HSN code for your records.
5
View the instant breakdown: Base Amount, CGST, SGST, IGST, and Total.

Calculation Formula

GST Amount = (Amount × Rate) / 100
CGST = GST Amount / 2
SGST = GST Amount / 2
Total = Amount + GST Amount

For inclusive: Base = (Amount × 100) / (100 + Rate)

All calculations are performed instantly in your browser. No data is sent to any server.

When to Use This Tool

Calculate GST on invoices before sending to clients

Verify GST amounts on purchase bills

Quick tax calculation for e-commerce sellers

Check CGST/SGST split for filing returns

Frequently Asked Questions

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