Smart GST Calculator – For Indian business

Use this GST calculator to add or remove GST from invoice values, handle intra-state and inter-state supply, and apply invoice-friendly round-off in a single click.

GST inputs & items

Choose amount type, supply type and default GST rate. Add multiple line items for an invoice-style calculation.

Amount type
Supply type
Set a default GST slab; you can override it per line item.
Make invoice totals clean and rounded.
Description
Qty
Rate (₹)
GST
Use per-line GST to override the default slab if needed.
Taxable base: ₹0.00
GST amount: ₹0.00
Total invoice: ₹0.00