The Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services in India, replacing multiple cascading taxes like VAT, Service Tax, and Excise Duty. GST operates on a dual model — CGST (Central) and SGST (State) for intra-state transactions, and IGST (Integrated) for inter-state transactions. Standard GST rates are 5%, 12%, 18%, and 28%, with some items attracting a cess. Understanding GST calculations is essential for businesses, freelancers, and consumers.

Our free GST calculator lets you compute the GST amount and total price from any base amount, or reverse-calculate the base price from a GST-inclusive amount. Simply enter the amount, select the applicable GST rate, and choose whether to add or remove GST. The tool shows the CGST, SGST, and IGST breakdowns instantly. Whether you are preparing invoices, checking bills, or planning purchases, this calculator saves time and eliminates arithmetic errors.