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.

2. How do I use Encalc?

Encalc is intuitive 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. What does "High Precision" do?

Encalc carries out its calculations without any rounding until the very end. By default, results are rounded to 4 significant figures unless "High Precision" is checked. Use "High Precision" if you want results to a higher precision than 4 significant figures.

4. 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".

5. 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.

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

While we take pride in the accuracy of our database and the power of our calculator, our results are provided as is. Encalc tries to do the best possible calculation, but we make no guarantee on the accuracy of the tenth decimal place of all our numbers. We cannot be held liable for your rocket's malfunction if all your calculations are done in Encalc without checking their validity. Similarly, if you calculate with another calculator, you would do well to check the results in Encalc.

7. 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 arcsin, arccos, arctan, arccsc, arcsec, arccot. 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) = 1.

8. Can I use binary or hexadecimal numbers?

Yes. Just use 0b before the binary number or 0x before the hexadecimal number. For instance, 5 in binary is 0b101 and 3245 in hexadecimal is 0xCAD.

9. Does Encalc support logical comparisons like "3>4" or "2 kg == 2000 g"?

Yes. The logical comparisons currently supported are >, <, >=, <=, and ==. If true, the calculated value is 1; if false, the calculated value is 0. See for instance the examples 3>4 or 2 kg == 2000 g.

10. Where is the calculator actually located?

The calculator does not require any installation. It is located online and works through your browser. To use the calculator, go back to the main calculator.