New Zealand GST Calculator is a handy app which allows you to calculate both the slabs of GST - 12.5, and 15% in one button click. It takes-in an amount (either gross or net) and allows you to add or reduce GST from given amount. Above that it allows you to copy GST results, share it on WhatsApp and other social networks. You can also capture screen and present proof of calculations Thank you for using New Zealand GST Calculator. Please share a word with your friends and colleagues.