Free GST Calculator India — CGST, SGST & IGST
Use Kampony's free online tool to get instant GST results. No signup required. Built specifically for Indian GST rules.
10 free invoices · No credit card required
GST Calculator
Instant CGST / SGST / IGST breakdown
Everything you need — all in one platform
From calculation to compliant invoicing — Kampony handles it end to end.
GST-Compliant Invoices
Tax invoices, bill of supply, proforma and delivery challans with auto CGST/SGST/IGST.
HSN/SAC Code Support
Search and apply correct HSN/SAC codes with auto GST rate lookup.
E-Way Bill & IRN
Generate e-way bills and IRN with QR codes directly from your invoice.
Inventory Management
Track stock levels, get low-stock alerts and manage purchases.
Reports & Ledgers
Sales, purchase, profit, GST and customer ledgers — exportable to Excel.
Telegram Bot
Create invoices and check payments right from Telegram.
How it works
Four simple steps from calculation to GST-ready invoice.
Enter your details
Input the amount, GST rate and transaction type (intra-state or inter-state).
Get instant results
See CGST, SGST or IGST breakdown instantly. No manual calculation needed.
Use in your invoice
Apply the calculated tax directly in Kampony to generate a GST-compliant invoice.
Download & share
Download the invoice as PDF or share via WhatsApp and email in one click.
Understanding GST in India
Goods and Services Tax (GST) is a unified indirect tax applied on the supply of goods and services across India. For intra-state transactions, GST is split equally between Central GST (CGST) and State GST (SGST). For inter-state transactions, a single Integrated GST (IGST) is charged at the full rate.
How to calculate GST
GST exclusive: If your amount does not include tax, GST = Amount × Rate ÷ 100. Total = Amount + GST.
GST inclusive: If your amount already includes tax, Net = Amount ÷ (1 + Rate ÷ 100). GST = Amount − Net.
Common GST rates
0%, 0.25%, 3%, 5%, 12%, 18% and 28% are the standard slabs. Use Kampony's HSN/SAC search to find the correct rate for your products.
Frequently Asked Questions
What is the Free GST Calculator?
It's a free online tool by Kampony to instantly calculate CGST, SGST or IGST on any amount based on Indian GST rules — for both intra-state and inter-state transactions.
Is Kampony free to use?
Yes. Kampony offers a free plan with 10 invoices, unlimited products and customers. Paid plans start at ₹149/month for unlimited invoices.
Does Kampony support e-way bills and IRN?
Yes. Premium plan users can generate e-way bills, IRN and QR codes directly from invoices in one click.
Can I use Kampony on mobile?
Yes. Kampony works on any mobile browser. You can also create invoices via the Telegram bot without opening a browser.
How is Kampony different from Tally or Vyapar?
Kampony is 100% cloud-based — no installation, no USB dongles, automatic updates. Plans start at ₹149/month vs ₹18,000+ for Tally. Access from any device, anywhere.
Is my business data secure?
All data is encrypted and stored on secure cloud servers with HTTPS. We never share your data with third parties.
Bill smarter with Kampony
Join thousands of Indian businesses billing smarter with Kampony.
No credit card required · 10 free invoices