Instant Tax Tool

Online GST Calculator: Accurate & Instant

Calculate Goods and Services Tax (GST) for any amount. Switch between GST Inclusive (reverse tax) and GST Exclusive, and see clear CGST, SGST, and IGST splits.

Calculation Summary
Net / Base Amount: ₹10,000.00
Total GST (18%): ₹1,800.00
CGST (9%): ₹900.00 | SGST (9%): ₹900.00
Gross Total: ₹11,800.00

How GST is Calculated: Formulas & Logic

1. GST Exclusive Formula

Used when product price does NOT include tax yet:

GST Amount = (Price × GST Rate) / 100 Gross Total = Price + GST Amount

2. GST Inclusive Formula

Used when retail MRP already includes GST:

GST Amount = Total − [Total × {100 / (100 + GST Rate)}] Base Price = Total − GST Amount