GST Calculator
Calculate the total price after adding GST (Goods and Services Tax).
$120.00
Total Price
$20.00
GST Amount
Formula
Total = Price × (1 + GST% ÷ 100)
Example
A $100 item plus 20% GST costs $120 ($20 gst).
Frequently Asked Questions
What is $100 plus 20% GST?
$120.00 (GST of $20.00).