GST calculator

Add 10% GST, or take it out of a price that already includes it.

1 The price

GST is 10%. On a price that already includes it, GST is one eleventh.

2 GST added

The price with GST is about $1,100.

  • Price with GST$1,100
  • GST$100
  • Price without GST$1,000
  • Price without GST
  • GST
See the detailed breakdown
Price without GST$1,000.00
GST at 10%$100.00
How many1

On a tax invoice, GST is one eleventh of the price that includes GST, to the nearest cent. Source

Questions

How do I add GST to a price?

Multiply the GST-exclusive price by 1.1. $1000 excluding GST is $1,100.00 including GST, of which $100.00 is GST.

How do I remove GST?

GST is one-eleventh of the GST-inclusive price. On $1,000 including GST, the GST is $90.91 and the price excluding GST is $909.09.