GST Calculator India – Free Online Tool

About This GST Calculator

This GST calculator helps you calculate GST for Indian Rupees. Whether you need to calculate 18% GST on a product or want to know the GST formula, this tool provides instant, accurate results. Use it for exclusive GST (add tax to base price) or inclusive GST (remove tax from total). It also shows CGST and SGST split for intra-state transactions and IGST for inter-state.

How to Use This GST Calculator

Amount – Enter the amount in INR.

GST Rate – Enter 5%, 12%, 18%, 28%, or any other rate.

Calculation Type – Exclusive (add GST) or Inclusive (remove GST).

Calculate – Click to see original amount, GST amount, total amount, and CGST/SGST details.

Features

• Exclusive & Inclusive modes
• CGST/SGST split – half of total GST each
• IGST – for inter-state transactions
• History – last 10 calculations saved locally
• Quick rate buttons – 5%, 12%, 18%, 28%

GST Calculation Formula

Exclusive GST: GST Amount = (Original Cost × GST%) / 100. Total = Original + GST.

Inclusive GST: Original = (Total × 100) / (100 + GST%). GST = Total – Original.

Common Use Cases

• Retailers – calculate final price including GST.
• Accountants – verify GST amounts in invoices.
• E-commerce sellers – determine product pricing.
• Consumers – check GST charged.
• Students – learn GST formula with examples.

Frequently Asked Questions