With our free online calculator, you can perform all basic arithmetic operations. These include adding (+), subtracting (−), dividing (/) and multiplying (×) whole and rational numbers. For more complex calculations such as angular functions, logarithms or roots, you are welcome to use our scientific calculator.

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Everyone knows classic calculators from school days or from everyday office life. The most common manufacturers are Casio, Sharp, Texas Instruments or Canon. With our simple online calculator or our extensive scientific calculator, you can now replace these calculators.

Of course, you can run as many calculators as you like in one series. Our online calculator adheres to the dot-before-dash rule. The rule states that multiplication (multiply by times, ×) and division (divide, /) have priority over addition (calculate plus, +) and subtraction (calculate minus, −). In all other cases, the evaluation of the arithmetic term is done from left to right.

## What other readers have also read

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- Before the introduction of electronic calculators, calculations were done with mechanical calculators and slide rules. These were usually simple adding machines. Only later were there so-called four-species machines - these are calculating machines that mastered addition, subtraction, multiplication and division
- The first pocket-size calculator suitable for everyday use in the size that we know of today was developed by Texas Instruments in 1967. This calculator prototype weighed 1.5 kilograms and was already powered by batteries.
- The first commercially viable calculators were then produced from 1970 onwards by the Japanese companies Sanyo, Sharp and Canon. The most successful calculator of the time was the Casio Mini, which was also affordable for ordinary people.
- It was not until 1972 that the first scientific calculator with trigonometric, logarithmic and exponential calculation functions appeared from Hewlett-Packard. One of its developers was Steve Wozniak, who co-founded the Apple company and significantly influenced the development of computers.
- It was not until the late 1980s that the first graphics-capable calculators came onto the market.

## Source information

As source for the information in the 'Online Calculator' category, we have used in particular:

## Last update on February 20, 2023

The pages of the 'Online Calculator' category were last editorially reviewed by Michael Mühl on February 20, 2023. They all correspond to the current status.

### Previous changes on October 26, 2022

- 25.10.2022: Publication of the Online Calculator and the Scientific Calculator.
- Editorial revision of all texts in this category