RetailCalc Pro
A Japan tax calculator that shipped the new 1% rate in days
RetailCalc Pro launched on August 20, 2026 with 1 votes, #11,494 of 23,274 launches that month.
What it does
Type a price, apply a discount, flip tax-inclusive/exclusive - RetailCalc Pro calculates Japan's consumption tax instantly, floor-rounded like real cash registers. Japan is weighing a cut to the reduced tax rate on groceries, from 8% to 1%, for two years from April 2027 - I shipped a dedicated 1% option within days of the news. Also included: calculation history, customizable rates, dark mode. Free for 10 calcs/day, one-time unlock for unlimited use. No ads, no subscription.
Instant tax-inclusive / tax-exclusive price and discount calculator for Japan
RetailCalc Pro instantly calculates tax-inclusive and tax-exclusive prices plus discounts under Japan's consumption tax — including the newly-proposed 1% reduced rate for groceries, added within days of the government announcement. 消費税の税込・税抜計算と割引計算を、金額を入れるだけで瞬時に。 政府が検討している食料品の軽減税率1%への引き下げにも、発表からわずかな期間で対応しました。 Type a price, tap a discount, flip between tax-exclusive and tax-inclusive view — the total updates instantly, rounded down to the yen exactly the way Japanese registers do it. 金額を入力して割引をタップ、税抜⇄税込を切り替えるだけ。 レジと同じ端数処理（切り捨て）で、金額がその場で正確に表示されます。 Japan is weighing a temporary cut to the reduced tax rate on groceries, from 8% down to 1%, for two years starting April 2027.…from retail-calc-launch.pages.dev
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Source: Product Hunt launch ↗
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