finance2026-07-163 min read

GST Calculation Formula with Real Examples

Learn the exact GST calculation formula in India. Calculate CGST, SGST, and IGST for business invoices easily. Use our free tool now!

Goods and Services Tax (GST) is a multi-stage tax structure applied to goods and services in India. Calculating GST is important for retail sales and corporate billing.

The GST Formulas - Add GST: GST Amount = (Original Cost x GST Rate) / 100 - Remove GST: GST Amount = Original Cost - [Original Cost x (100 / (100 + GST Rate))]

Compute taxable value, inclusive, or exclusive rates instantly using our online GST Calculator.