### What is a calculator in simple terms?

According to Wikipedia: *A calculator is a machine that allows people to do math operations more efficiently. For example, many calculators will add, subtract, multiply, and divide. Some also calculate square roots, and more complex calculators can help with calculus and draw function graphs. Calculators are ubiquitous. Smartphones and other computers can also serve as a calculator. *

Some calculators, such as the abacus, will work without requiring batteries. Others, like the electronic calculator, need batteries. There are two main types of electronic calculators: simple calculators—which can only add, subtract, multiply and divide, and sometimes take square roots—and scientific calculators—which can do many other things, such as calculate factorials and trigonometry functions.

### What does Calculator Zen do?

At Calculator Zen, we strive to be your number one source for many different types of calculators and conversion tools. We're dedicated to giving you the world's best free online calculators.

Calculator Zen is led by experienced master calculator builders who have created calculators of many different kinds. Building calculators is truly our passion—we are quite literally calculator nerds and proud of it 🤓

We're here to help you and the rest of the world with your many calculation needs. If you have any questions or comments, feel free to contact us.