式が見える電卓(時間計算、和暦変換、年齢、為替、税率も計算)

You can see the formula at any time, so it's safe. It's completely free and ad-free. This calculator can calculate time in hours, minutes, and seconds, convert between the Japanese and Western calendar years, calculate age from birthdates, calculate tax rates, and calculate dollar and euro exchange rates.

Have you ever been in the middle of a calculation and thought, "Huh, what did I just add?" "Equation Visible Calculator" is a calculator app that keeps track of entered formulas, making reviewing and recalculating incredibly smooth.

What's more, it's packed with all the calculation functions you might find "a little tedious" in everyday life or at work.

[Key Features]
■ Permanently visible formulas: Entered formulas and answers are saved as a set in the history. Tap the history to instantly reuse the values. This prevents calculation errors.

■ Business-friendly "Percentage Calculations": Intuitively calculate amounts like "10% more than 1,000 yen (tax included)" or "25% off 5,000 yen." Experience the same user experience as a business calculator.

■ Hour, Minute, and Second Calculations: Simply enter time additions and subtractions, such as "3 hours 45 minutes + 1 hour 20 minutes = ?". Perfect for calculating work hours, video editing, and more.

■ Convenient Japanese Calendar, Age, and Date Features - Simply enter your date of birth (8 digits) to instantly convert to the Japanese calendar and your current age. - Enter the Gregorian calendar year to display a list of corresponding Japanese calendar years. - You can also calculate the difference in days between two dates.

■ Foreign Currency Conversion (Exchange Rates) - Convert dollars ($) or euros (€) to Japanese yen with a single tap at a set rate. Convenient for shopping on overseas websites and traveling.

■ Customization - Choose from eight button colors (red, green, light blue, pink, etc.). - Choose from small, medium, or large font size for history, reducing eye strain.

[Recommended for]
Businesspeople who want to reduce calculation errors

People who want to easily calculate work hours

People who often find themselves wondering, "What year was it in the Showa or Heisei era?" when filling out documents

People looking for a simple yet powerful calculator

Completely free and ad-free. Please use it as your partner to make your daily calculations a little more convenient.