Free GST and business tools for Indian shops
Quick answers to everyday questions at the counter and in the back office: how much GST is in a price, whether a GSTIN is typed right, which state a pincode is in, and the usual GST rate for common goods.
The tools
GST calculator
Add GST to a price, or find the price before GST inside an amount that already includes it. See the tax split as CGST and SGST for a sale within your state, or IGST for a sale to another state.
Open the gst calculator →GSTIN checker
Type or paste a GST number to check that it is well formed: 15 characters, a real state code, a PAN in the middle and the right check digit at the end. It catches most typing mistakes before they reach an invoice.
Open the gstin checker →Pincode lookup
Enter a 6-digit Indian pincode to see its post offices, district and state, with the state’s GST code. Handy for filling an address on an invoice or checking a customer’s place of supply.
Open the pincode lookup →HSN codes and GST rates for common goods and services
A short, searchable list of the HSN (goods) and SAC (services) headings the shops and traders we serve use most, with the GST rate MudraERP’s trade setups start with under GST 2.0 (in force since 22 September 2025). It is a starting point, not a complete tariff.
Open the hsn codes and gst rates →
The tools give general information only and are not tax or legal advice. Nothing you type in the GST calculator or GSTIN checker leaves your browser; pincode lookups go to our server to read the India Post directory.
Start billing the way your shop works
Tell us about your business. We set up your account for your trade, usually within a working day, and show you around on a short call.