Business & GST

GST Calculator India

Add GST to a base price or extract GST from an inclusive amount. Choose intrastate (CGST + SGST) or interstate (IGST) and any standard GST rate.

Inputs

Calculation Mode

Amount (₹)

GST Rate

Transaction Type

Results

GST calculator for Indian businesses

Goods and Services Tax (GST) is charged on supply of goods and services. Use this calculator to add GST to a pre-tax price or back out GST from a tax-inclusive invoice total.

Add GST

Enter the base amount before tax. The calculator adds GST at your chosen rate and shows the final payable amount with CGST/SGST or IGST split.

Remove GST

When you have a GST-inclusive price, switch to remove mode to find the base amount and tax component. Useful for reverse-calculating margins.

CGST, SGST, and IGST

Intrastate sales split GST equally into CGST and SGST. Interstate sales use IGST at the full rate. Match the transaction type to your invoice.

Create GST invoices

After calculating tax, generate a formatted invoice with our GST invoice generator including HSN/SAC and line-item rates.