Disclaimer: THIS APP IS NOT MADE BY AN INDIAN GOVERMENT APPS. GST Calculator Tool is simple, easy to use and the quickest way to calculate GST tax on sales or purchase of goods or services. Calculate Integrated Goods and Service Tax (IGST) or Central Goods and Service Tax(CGST) and State Goods and Service Tax(SGST) on Maximum Retail Price (MRP) of an item. Calculate GST Tax on the go along with other mathematical calculations. GST Calculator Tool is combination of two calculators: Simple GST