GST Calculator

Add or remove GST with CGST / SGST breakup.

Total price (incl. GST)
₹0
Base amount ₹0
GST (18%) ₹0
CGST ₹0
SGST ₹0

How GST is calculated

Add GST: GST = amount × rate ÷ 100, total = amount + GST. Remove GST (from a GST-inclusive price): base = amount ÷ (1 + rate/100), and GST = amount − base. For sales within a state, GST splits equally into CGST and SGST; for inter-state sales it's a single IGST.

FAQs

How do I add GST?

GST = amount × rate ÷ 100. Total = amount + GST. E.g. 18% on ₹1000 = ₹180, total ₹1180.

How do I remove GST from a total?

Base = amount ÷ (1 + rate/100). GST = amount − base. This is reverse GST.

What are CGST and SGST?

Within a state, GST splits equally: 18% = 9% CGST + 9% SGST. Inter-state uses single IGST.