GST Calculator

Create Full GST Invoice →

Need a complete tax invoice with all these calculations? Use our free invoice generator.

How GST Calculation Works

GST (Goods and Services Tax) is calculated on the taxable value of goods or services. The rate depends on the HSN/SAC code classification. The most common GST rates in India are 5%, 12%, 18%, and 28%.

CGST, SGST & IGST — What's the Difference?

Intra-State (within same state): GST is split equally into CGST (Central GST) and SGST (State GST). For example, 18% GST = 9% CGST + 9% SGST.

Inter-State (different states): The full GST amount is charged as IGST (Integrated GST). For example, 18% GST = 18% IGST.

GST Exclusive vs Inclusive

• GST Exclusive (Add GST): You enter the base price and GST is added on top. Total = Base + GST Amount.
• GST Inclusive (Remove GST): You enter the final price that already includes GST. The calculator extracts the base price and GST components.

Looking for HSN/SAC Codes?

Use our HSN & SAC Code Finder to search 2000+ codes with applicable GST rates. Or read our Complete GST Guide for Indian small businesses.