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History of Casio Calculators

Black and white picture of the four Kashio brothers in suits in front of an all-electric calculator.

Casio Computer Co., Ltd. was founded by the four Kashio brothers (Tadao, Toshio, Kazuo, and Yukio) in 1957. That same year, the company, in eﬀorts led by the second-eldest brother Toshio, developed the “14-A,” which was the world’s ﬁrst compact all-electric calculator, meaning that it ran only on electric circuits rather than using gears or motors.

Thereafter, the four brothers combined their respective strengths to grow the business while putting into the practice their ideals of “creativity and contribution.” Counting from the year 1965, the year 2025 marks the 60th anniversary of when the company launched the “001,” the ﬁrst electronic desktop calculator with memory functions. Let’s look back on this long and storied history.

1965: The square desktop calculator from CASIO in beige-grey with a narrow display and white and black keys.

1965: 001

World’s First: Onboard Memory Functions

This model was the beginning of Casio’s electronic desktop calculator line. Its memory functions made a wide variety of calculations more eﬃcient. The 001 marked the beginning of a new era of calculators.

1967: Angular, printing calculator from CASIO in dark grey with white and black keys.

1967: 101P

World’s First Onboard Recordkeeping (Printer) Functions

The 101P was capable of printing values and the results of calculations onto a roll of paper, allowing users to check the information later or keep records. This contributed greatly to more eﬃcient work operations and accounting.

1972: Flat, black and white calculator with various keys and calculation options and a narrow, digital display.

1972: FX-1

The First “Scientiﬁc Calculator”

This model supported the calculation of 16 types of functions, including trigonometry, logarithms, and cube roots, all accessible from one-touch key operations. The FX-1 was the ﬁrst in Casio’s revolutionary scientiﬁc calculator line.

1972: Compact, rectangular calculator with keys on the right-hand side and a small digital display on the left-hand side.

1972: CASIO Mini

World's First: Personal, Compact Calculator

The Casio Mini is notable for changing the concept of a calculator from a piece of oﬃce equipment to an everyday household item. It shocked the industry when it debuted at just one-fourth the size and one-third the price (at ¥12,800 [JPY]) of the mainstream models of the time.

1983: The JS-20 pocket calculator with solar module and narrow, digital display as well as large black keys.

1983: JS-20

Origin of the Standard Business Calculator Series

The JS-20 was a solar-powered model at the perfect size for use either on a desktop or in the hands. Its design focused extensively on ease of use and practicality, and contained a wide variety of calculator functions required for business.

1983: Two rectangular calculators in black and white with a small solar panel next to the digital display.

1983: SL-800

World’s Thinnest Calculator in a Credit Card Size

Using a ﬁlm-like approach to the electronic components, the SL-800 achieved a thickness of just 0.8 mm and a weight of 12 grams. This model combined the imagination and technical skills of Japan and was considered to be the ultimate in portable calculators.

1985: Upright calculator with large digital display and small keys with various calculation and graphic functions underneath.

1985: fx-7000G

World’s First: Calculator with Onboard Graphing Functions

The fx-7000G made it easy to display graphs merely by entering a formula, where graphs previously had to be drawn by hand. This model contributed to mathematics education in the United States.

2010: The black prj-CG1020 scientific calculator with a large colour display and many buttons.

2010: gx-CG1020

High-Resolution Color Display

This model sought to build interest in mathematics through, for example, analyzing a photo showing the lines drawn by water in a fountain and then generating a function to describe the phenomenon. It was helpful in supporting learning by reinforcing visual understanding through the use of colors for numerical values and graphs.

2014: Black ClassWiz calculator with digital display and black and white keys for scientific calculations

2014: Origin of the ClassWiz − EX Series

Country-Speciﬁc and Language-Related Functionality

The ClassWiz Series aligned with the school curricula in various countries via changes in functionality and language according to the country of use. This series is a collection of standard scientiﬁc calculators.

2015: The S100X calculator in black with a small solar panel above the rectangular digital display and large black keys

2015: S100X

Reliability That Comes from Being Made in Japan

The S100X was designed as the flagship Casio calculator, favorably combining technology and the company’s reputation in a high-quality and easy-to-use model. It has been a popular option as a gift.

2022: The white and grey ergonomic pocket calculator from CASIO with a slightly inclined operating surface

2022: Ergonomic Calculators

Pursuit of Ergonomics in Calculator Design

The Ergonomic Calculators were created in consideration of ergonomic principles for the vertical pressing of the keys, with the calculator’s operable surface slanting at an incline of three degrees to align with the shape of the hand. With this design, the Ergonomic Calculators indeed oﬀer a new “angle” in its approach to the pressing of keys.

2025: 60 Years Since the Birth of the "001"

Since the launch of the "001" in 1965, Casio calculators have continued to evolve through innovation while remaining easy to use and reliable. As we celebrate this milestone, we look to the future with the same commitment to quality and craftsmanship, creating products users can count on, now and forever.