calculator

Your carbon footprint is a measure of the amount of carbon dioxide that you produce through such activities as traveling, using electricity, consuming food, and other aspects of daily life. Carbon Footprint Calculator is a simple program that can help you calculate your carbon footprint and identify areas where you might be able to reduce your output.

The program's interface is simple and easy to navigate, consisting of only one screen with a variety of simple questions about your daily activities. There's a transportation section, an energy section, a recycling and activities section, and a food section. Some … Read more

After a long, hard semester of classes, manually calculating your GPA might be the last thing on your mind. Give your brain a rest and try some of these GPA calculators:

Web There are a lot of GPA calculators on the Web, but one of the better ones is from Koofers.com. The Koofers GPA calculator allows you to add up to eight courses and grades before tabulating your final GPA. It's also flexible enough to allow you to modify the GPA scale. If your school uses a unique scale, you can change it to match the one your … Read more

For those who have misplaced their TI-83 graphing calculator, Google has introduced a graphing tool that plots mathematical functions on the search results page.

Students and lovers of all things math need merely to type in a function to the Google search bar, and the tool will render an interactive graph, Google explained today in a company blog announcing the new tool.

"You can zoom in and out and pan across the plane to explore the function in more detail. You can also draw multiple functions by separating them with commas," Google engineer Adi Avidor wrote. "This … Read more

For Muslims, time, place, and direction are critical to worship. Accurate Times by the Jordanian Astronomical Society is the perfect tool for the task. This compact freeware calculates prayer time, sun time, direction, date, and other data with an accuracy of two seconds or less. It offers Arabic and English language options, accurate graphical displays, and some important extras.

Accurate Times has a simple, compact interface that is nicely configured, displaying our location and other data as well as the day's prayer times. The layout slightly resembles a telescope control panel, which (not surprisingly) it is, in a way, … Read more

Think all desktop calculators are the same, just with different buttons? You're pretty much right. Most basically replicate the look and functions of a handheld calculator on your desktop. The built-in Windows calculator is fine for quick jobs, while some scientific and mathematical desktop calculators wouldn't look out of place hanging from an engineering student's belt. Then there's SFR Calculator Personal Edition. The best description we can come up with is a Windows calculating utility. SFR integrates a number pad, of course, since it's essential, but its built-in document feature lets you save, annotate, and … Read more

Microsoft's Excel is everywhere in the business world, in part because it's such a versatile platform. Med-e-Forms offers several free Excel workbooks that handle a variety of tasks for small businesses such as physicians in private practice. The company's Free Excel Invoice Template & Profit Calculator is essentially a basic business suite in one Excel workbook.

Some of the free Excel templates we've seen from this publisher have been fairly plain, but this tool's clear, colorful instructions and efficient layout show what Excel is capable of doing. The Instructions sheet provides details for Excel 2007-2010 (… Read more

Excel users have access to a huge range of free forms, templates, and tools to help them maximize the potential of Microsoft's industry-leading spreadsheet application. Better still, nearly all are free, like Free Employee Hourly Cost Calculator and Labor Burden Estimator from Med-e-Forms. It's all set up and ready to fill in with your data.

We opened the workbook in Excel and enabled editing. As with many Excel templates, it's a busy affair, but color-coding, sample entries, and frequent explanations made for easy setup. Step 1 involved entering tax data, while in Step 2 we entered wages, … Read more

You probably change your computer every couple of years and update your phone based on Apple's release cycles. But chances are that inside your briefcase or in your desk drawer, there's a gadget that hasn't been changed for decades. It still works well, and you like it just the way it is.

The device in question is the HP 12c calculator, first launched exactly 30 years ago today, on September 1, 1981. Ever since, without much fanfare, it's been a quietly vital tool in finance, business, and academia. According to HP, the 12c is still one of only two standard calculators permitted for use during financial professional certification exams. This is because when it was released, the calculator offered more-accurate computations than the federal standard. It also features an unmatched keypad layout that provided unprecedented ease of use. The device itself is compact enough to fit in a pants pocket.… Read more

Web Loanalyzer is a free loan calculator written in HTML and JavaScript. It quickly analyzes a loan's parameters and explains in plain English how long it will take to pay the loan off, how much interest will be paid, and so on. We took a look at Web Loanalyzer Q1.

We extracted Web Loanalyzer's zipped program file and clicked it, which opened the calculator in our Web browser. Web Loanalyzer is locally hosted, so you don't need an active Internet connection to use it. The program's interface is small, about the size of two banner ads … Read more