Free GST Calculator India

How to use this GST calculator

1. Enter the amount — either before GST (exclusive) or after GST (inclusive).
2. Pick your GST rate — 5% (essentials), 12% (processed food, basic services), 18% (most goods + IT), 28% (luxury, automobiles).
3. Toggle the type — "Add GST" works on the listed price; "Extract GST" works on a price that already includes GST.
4. Read the live results below. No buttons, no waiting.

Common GST rates for Indian e-commerce

• 5% — Apparel under ₹1,000, footwear under ₹1,000, packaged groceries
• 12% — Apparel above ₹1,000, processed food, mobile phones
• 18% — Most consumer electronics, furniture, restaurants (without ITC), IT services, software
• 28% — Cars, two-wheelers above 350cc, luxury watches, premium cosmetics

Frequently asked questions

Inclusive vs exclusive — which one should I pick?

If your product page shows the price before GST and you're calculating what to charge → Add GST (exclusive). If you have an MRP that already includes GST and you want to know the base price + tax breakup → Extract GST (inclusive).

Is this calculator accurate for invoicing?

The math is exact (rounded to 2 decimals). For actual GST invoices, you'll also need a GSTIN, HSN/SAC code, and CGST+SGST split for intra-state sales (CGST = SGST = half of total GST). For inter-state sales it's IGST only.

What's the difference between CGST, SGST, and IGST?

For sales within a state, GST splits 50/50 between Central GST and State GST. For sales across states, it's a single Integrated GST (IGST) charged at the full rate. The total tax burden is identical — only the split changes based on whether the buyer is in the same state.

Do I need to register for GST to sell online?

If your turnover is over ₹40 lakh (₹20 lakh for special category states), yes. For online sellers using marketplaces like Amazon or Flipkart, GST registration is mandatory regardless of turnover. FlexiCommerce handles GST invoicing automatically once you add your GSTIN.

How does FlexiCommerce help with GST?

FlexiCommerce auto-generates GST-compliant invoices for every order, applies the right rate based on product HSN code, splits CGST/SGST/IGST correctly, and exports GSTR-1 ready CSVs at month-end. See pricing or try the live demo.