calculation

Formulas Lite is a collection of important information and tools to help students get through some of the tougher subjects in school.

The meat of the Formulas Lite app is in the Subjects tab, where you'll find a huge database of must-know formulas for mathematics, physics, and chemistry. Within each of these top-level subjects, formulas are further organized by topic. For instance, under mathematics you'll see formulas organized in branches from algebra to statistics. Under physics, you'll see formulas organized in branches from relativity to torque. Within the chemistry section, you'll also find a functional periodic … Read more

RealCalc gives your Android mobile device all the mathematical prowess of a traditional, physical scientific calculator. When you first use the app, you'll notice that it looks just like the real thing. The button layout and functions feel familiar, and the act of punching out calculations just seems natural. The bottom half of the screen is dedicated to number keys and common arithmetic operations (multiplication, addition, and so on), while the top half of the screen is dedicated to more complex operations like logarithms, radicals, roots, and trigonometric values. And similar to the scientific calculators we all know and … Read more

Scientific calculators are kind of like wildlife tags, clearly identifying certain individuals as nerds, who themselves view the tricorder-size devices as badges of honor and marks of distinction. While handheld scientific calculators will long find a cherished place on many a belt, smartphones and other powerful handheld devices are starting to target their lunch money, in part by ganging up with freeware like EasyFindSoft's Smart Scientific Calculator. It's a free, totally portable, fully featured scientific calculator for your desktop, laptop, or other Windows devices. It's HTML-based, uses Flash player, and offers a widget you can embed in … Read more

Like any modern operating system, Mac OS X includes a calculator app. It loads quickly and can be used for simple formulas, but it's not the fastest way to arrive at a mathematical truth on your Mac. Instead of opening the calculator app, likely by typing some part of "calculator" into the Spotlight search box, and then closing the calculator app when you're done, you can use Spotlight itself as a calculator.

Just type a mathematical expression into Spotlight, and it will return the answer--as the top result, right in the window. It's best for … Read more

Sometimes good things come in not-very-fancy packages. That's definitely the case with Conversion Calculator. It's not much to look at, but it may well be the most comprehensive conversion calculator we've ever seen.

The program's interface is quite plain; it's not particularly attractive, but it is intuitive. There are spaces for your source value and the conversion, a number pad (with keys for entering negatives and fractions), and two absolutely huge dropdown menus that contain the various units that the program can convert. We encountered quite a few units we'd never even heard of, … Read more

GPA Calculator from Vertex42 is a free Excel template that is configured for calculating grade point averages based on the common four-point grading scale corresponding to letter grades A, B, C, and D, with percentages for plus and minus grades. Since it's an Excel template, it can be customized for individual needs and copied as many times as you need. It requires Microsoft Excel or an Excel-compatible spreadsheet tool.

GPA Calculator downloads as a zipped file. We extracted it, opened it in Excel, and clicked Enable Editing to turn off the protected view. The spreadsheet lists course, grade, credits, … Read more

Digitize It by Alcasa is a free tool for extracting digital plotting data from image files. It has many uses, such as plotting points when the source data isn't available. It's easy to use; simply click on an image with your mouse to plot the point. Collected data can be pasted directly to Excel.

We extracted the zipped download and installed Digitize It, which opened with an interface that is similar in style to graphics editors but notable for floating options and tool tips boxes within the main window. The toolbar icons are mostly familiar with the addition … Read more

Vertex42's Paycheck Calculator for Excel is a free spreadsheet template that lets users calculate where their paycheck goes every month. It calculates deductions, withholdings, and allowances, including state and local taxes, FICA, 401(k) contributions, and more. It requires Microsoft Excel 2002 or later; we also recommend having the necessary financial records on hand, such as pay stubs or tax forms.

We extracted Paycheck Calculator's zipped download and clicked it, which opened it inside Excel. It's a cleanly configured Excel spreadsheet with a variety of simple fields for entering data, which were filled with helpful example entries. … Read more

Mortgage and Loan Calculator Analyzer from Debt Management Tool by TSI: It actually takes about as long to type that out as it does to display detailed information about your home mortgage, provided, of course, that you have your records and figures handy. It's optimized for mortgages, but it can calculate the rates and schedules for other loans, too.

Mortgage and Loan Calculator Analyzer opens with an example mortgage displayed in its businesslike interface, with several other examples available in the Mortgage List field. Large buttons labeled Add, Copy, and Delete let us remove the examples easily when we … Read more