Numi

This is a calculator application on the Mac.

Numi calculator lets you combine calculations and text. You are able to share your computations with others. To make that mixing of text and calculations easy, you could use quotation marks (”...” or `...`). If the text contains a numeric expression that you do not want to use in the calculation, it should be placed within the quote marks as indicated. These parts will not be considered as mathematical expressions. Colon characters also could be used. Your operations will be calculated according to the correct mathematical order. If you need to change the order of precedence then parenthesis could be used. The point is used as decimal separator. Sometimes it is necessary to use a suffix to clarify the math expressions when you are trying to share it with others. In such cases, the suffix string could be used immediately after the number, no spaces in between.

The number of decimal points to be used in the results can be set in the preferences. Copying the result to clipboard is easy. You can simply click on the result and the value will be copied. When you copy text, for selected rows the result will be copied, as well. Variable can be declared by using an equal sign and these can be used in an expressions after they have been declared. Variable names are not case sensitive. Multiple variables could be declared on a single line by separating these variables by a semicolon as a delimiter. Functions such as sqrt, trigonometric functions, etc. could be used. This is a very good tool.

Numi calculator magically combines calculations and text, and allows you to share your computations with other users.
Here's how it works. Type text, or simply paste it in. For example, you could type something like this:
50 apps * $1.99 each + 3 apps * $4.99 + Photoshop for $600
Numi gracefully adds up all the numbers for you, and displays the result on the right-hand side. Of course, it can handle more complex math than the simple example above. Either way, you don't have to rewrite what you enter - whether it is text, numbers, or comments - Numi automatically understands and computes what you write.
- All Text features: Add comments, or titles right inside your calculations. Numi comes packed with all the benefits of a text editor: copy, paste, undo, and fast navigation.
- Autosave: You don't lose your calculations upon exit. All your calculations are automatically saved after exit, and will be loaded when you relaunch.
- Totals: Automatic calculation of the totals for all the results is recalculated automatically. In order to get a grand total, it's as simple as writing "Total".
- Variables: Automate your calculation workflow. Use variables for automatic recalculations and more convenient calculations without needing to submit new values.
- Accessible results: When you copy text from Numi to another application, the results will be copied, as well.
Testimonials:
"It's very cool and makes simple, common calculations very easy and fun." - Lifehacker
"But every now and again we bump into an app so elegant, so useful, so pleasant that we'd sign a petition for Apple to include it in the next version of OS X." - Mac360
"What it does, is let you solve problems like they were word problems." - Addictive Tips
"The Magic Calculator That Blends Math with Text." - Mac AppStorm