GST Calculator
Tax & SalaryAdd or remove GST at any rate and split CGST/SGST.
Runs entirely in your browser — nothing is uploaded
Features
- Add GST to a net amount, or extract it from a gross figure.
- Preset slabs of 5%, 12%, 18% and 28% plus any custom rate.
- Automatic CGST/SGST split for intra-state supply, or IGST for inter-state.
- Clear breakdown you can copy onto an invoice.
How to use the GST Calculator
- 1Enter the amount and choose whether GST is already included.
- 2Pick a tax slab or type a custom rate.
- 3Read the net, tax and gross breakdown.
Frequently asked questions
How is GST removed from an inclusive price?
Net = gross × 100 ÷ (100 + rate). For an 18% slab, a ₹1,180 gross price is ₹1,000 net plus ₹180 tax.
When is it CGST/SGST instead of IGST?
Intra-state supply splits the rate evenly between CGST and SGST. Inter-state supply is charged as a single IGST line at the full rate.