消費税増税に向けて消費税を素早く計算するアプリです.

税抜金額　税込金額　どちらからでも相互に計算できます.
税率を変更可能です。初期値は8%です.

It is an application to quickly calculate the sales tax toward a consumption tax hike.

I can be calculated from each other even 抜金 tax amount including tax either.
It is possible to change the tax rate. The default value is 8%.