Here are some questions that may help you. If you have a question that isn't here, feel free to ask us.

1. What is Encalc?

Encalc is a free online calculator with support for variables and dimensional units (meters, inches, Amps, etc). It makes unit conversions and evaluating formulas simple by abstracting away the calculation part from your side to the computer's side. Encalc was made to simplify long, dimensionful calculations. You can also define variables in order to vary the parameters independently of the expression. Finally, Encalc supports advanced mathematical calculations, such as solving systems of equations and matrix multiplication.

2. How do I use Encalc?

Encalc is easy to use - type in a calculator expression in the input and hit enter. If you want to define variables (like M=10 kg) you can do so under the Variables section. For example, the assigned variable would be "M", and you would assign "10 kg" to it. See this example for how it works.

3. Where is the calculator actually located?

The calculator does not require any installation. The actual calculations are performed in the cloud. The user interface works through your browser, connecting with our server to perform calculations. To use the calculator, go back to the main calculator.

4. What does "Exact Mode" do?

Encalc carries out its calculations with exact numbers whenever possible. For example, pi is treated as exactly pi, not just 3.14. If "Exact Mode" is enabled, pi will return pi instead of a decimal number. As an example, compare the difference between acos(0) with Exact Mode, and acos(0) without Exact Mode.

5. Can I send a calculation to someone else via email?

Yes. Every result comes with its own link, which you can then send to other people to share calculations. To get the url, just right click on the expression in the result and select "Copy URL" or "Copy Link Location".

6. What sort of constants does Encalc know?

Encalc knows a wide variety of constants. If you ever aren't sure if it knows a constant, just try it. Some constants known are the distance from the Earth to the Moon and epsilon_0. For more examples, see the documentation page.

7. Should I use Encalc for life-or-death calculations?

While we take pride in the accuracy of the database and the power of the calculator, our results are provided as is. Encalc tries to do the best possible calculation, but we make no guarantee on the accuracy of results.

8. Can I use functions like log, sin, or tan?

Yes. Currently, Encalc supports the abs, sqrt, log, ln, exp, sin, cos, tan, sec, csc, and cot functions, as well as the inverse trigonometric functions asin, acos, atan, acsc, asec, acot. Use any sort of parentheses you want to use a function: log(18) + sin(3). The arguments to trigonometric functions do not necessarily have to be expressed in radians or degrees, since radians and degrees are treated as dimensionless. However, using radians or degrees will still give you the correct answer, for instance sin(90 degrees).

8. Does Encalc have a graphing calculator, too?

Yes. Here is a link to the graphing calculator. Currently, Encalc Grapher supports the log, ln, sin, cos, tan, sec, csc, and cot functions, the inverse trigonometric functions asin, acos, atan, acsc, asec, acot, the hyperbolic trigonometric functions sinh, cosh, tanh, sech, csch, coth, and the inverse hyperbolic trigometric functions asinh, acosh, atanh, asech, acsch, acoth.