Add a discount and GST to a marked price and see the final amount you actually pay.
Assumes the discount is applied first and GST is charged on the discounted price, as on most invoices.
On most invoices GST is charged on the discounted price, which is what this calculator assumes.
Shops round each line and may use different GST rates for different items.
Yes — enter the price, any discount and the GST rate.
No. Everything is worked out in your browser and nothing you type is sent to a server.