01 · Why
Built from the same rules as the app
The GST calculator uses the same arithmetic as BillCountr's bills, to the paisa, and the HSN finder uses the same code list the app suggests from. If you check a sum here and then bill it, the two agree.
- Same rounding as a printed bill
- Only today's GST rates
- The codes the app suggests
- Free, with nothing to sign up for
