Windows 7 has gone in for a renovation and the new Windows 7 Calculator leaps ahead of its predecessors. It has multiple modes (Scientific, Programmer, and Statistics), conversion features, worksheets to work out your fuel economy, lease payments, and mortgage payments, and a few more nice touches. There’s of course, the neat look too.

But it’s still not as advanced as a section of users would like.

Thankfully, other free calculators come in various flavors. From the dirt simple Google search bar to the gallery of browser add-ons. Then you can factor in these five free calculation tools (simple to advanced) that should stand up to the numbers you throw at it.

## SFR Calculator

SFR Calculator has an MS Office-like interface. It also gives you a choice of three skins. Unlike other free calculators, its use is similar to the kind we do on paper. You can use it like a text editor and add comments or any other annotations to your calculations. The advantage of the tape style of calculations is that the calculations can be kept as records and even printed out. The calculator may not be suitable for power users but can be used to perform accounting operations.

SFR Calculator (ver.4.0.6) is an 8.6MB free calculator download. It is supported on Windows 2000, XP, 2003, Vista, and Windows 7. Versions of SFR Calculator are available for Windows Mobile and the iPhone.

## Moffsoft FreeCalc

Moffsoft FreeCalc is also similar to the above application in the way it uses a printable and savable interface (“˜tape’). You can set the display to use different color schemes. Numbers to be calculated can be neatly arranges in groups on the tape. The calculator is very light on resources and can be quickly accessed from the system tray.

Moffsoft FreeCalc (ver.2.0) is a 764KB download. It is supported on older Windows OS, Vista, and Windows 7.

## SpeedCrunch

SpeedCrunch comes as an installer and also in a portable version. It has a clean user interface and a very intuitive response to your inputs. SpeedCrunch calculates even as you type and this auto-completion behavior is quite handy when it comes to result speed. Results are precise up to 50 decimal points. Syntax highlighting also minimizes errors as you type. You can feed in formulas, constants, and functions from the extensive library that’s available. SpeedCrunch supports unlimited range of alpha-numeric variables and it also lets you store your own for later use. If the stored variables are too many, there’s a handy search bar to help locate them.

SpeedCrunch records everything in history and you can easily recall and reuse a previous expression. You can also save a session for later use.

SpeedCrunch (ver. 0.10.1) is a 2.4MB download. It is supported on Windows, Mac OS X, and Linux.

Also read: SpeedCrunch – High Precision Freeware Desktop Calculator SpeedCrunch - High Precision Freeware Desktop Calculator SpeedCrunch - High Precision Freeware Desktop Calculator Read More

## SpeQ

SpeQ is a mathematical software which uses a sheet (or tape) just like the two we have mentioned before. But unlike them, SpeQ offers a library of computational functions. You can define your own variables and use them in your functions. The software has 100 pre-loaded constants plus 130 built-in units. You can plot graphs and trace the plotted functions. The memory list helps to reuse all previously defined functions and variables. You can add in your comments in the sheet, save it, and also print it out.

SpeQ (ver.3.4) is a 520 KB portable download. Installer is also available. It is supported on Windows (all).

## SpaceTime

SpaceTime goes beyond the idea of just a free calculator and falls into the category of an advanced scientific application for power users. There are interactive tutorials which help you to start off with the app. SpaceTime has support for 2D and 3D graphing features. The scientific calculator has a large catalog of functions. The mathematical software covers algebra, computer algebra system (CAS), trigonometry, statistics (scatter plots, probability plots, histograms etc), and calculus among other capabilities. You can also enter your own scripts for solving loops, recursion and generating functions. Ultimately, you can capture screens, frames and results with a click.

SpaceTime (ver.4.0) is a 1MB download. It is supported on Windows (2000, XP, Vista, and 7) and Mac OS X. SpaceTime can also be downloaded for the iPhone and the iPad (not free). SpaceTime requires an obligatory free registration for use.

The five calculators cover the breadth from simplicity to complexity. The one you pick will depend on the level of calculations you need to perform. What’s your view on the above five? Which is your favorite calculator app?

Image Credit: Shutterstock

also check this calculator - lots of formulas to choose from:

http://www.fxsolver.com

Sicyon calculator is all-in-one freeware tool for every scientist. The core of Sicyon is an VBScript/JScript scripter and the principal features are: estimate a function using variables and user-defined functions; matrix operations; plot/tabulate a function; find real roots, minimums, maximums and definite integral of a function; fit a function over data set; sophisticated units converter; database reader with various physical and chemical constants; and various tools as add-in applications.

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Calc98 is a free and very versatile calculator, available for Windows desktop and mobile systems. It has many modes in addition to the basic arithmetic functions: programmer, financial, engineering, scientific, statistical. In addition to the usual algebraic input mode, there's also an RPN mode. It also does units conversions based on a large database of conversion constants. There's also a database of physical constants built in. Both databases are updatable.

You can check it out at http://www.calculator.org/Calc... where you can also download it.

Calc98 is a free and very versatile calculator, available for Windows desktop and mobile systems. It has many modes in addition to the basic arithmetic functions: programmer, financial, engineering, scientific, statistical. In addition to the usual algebraic input mode, there's also an RPN mode. It also does units conversions based on a large database of conversion constants. There's also a database of physical constants built in. Both databases are updatable.

You can check it out at http://www.calculator.org/CalcHelp/default.aspx, where you can also download it.

How's this - Construction Advantage Calculator 2.0? I found one for Mac though it's not free - Construction Calculator

Moffsoft Calc just rocks. Bought it 4 years ago, and with the paid version you get markup/margins, unit conversion and much more. One of the first installs on a new computer.

I'm looking for a contractor calculator program. It's to make operations with feet and inches (probably you have seen the yellow ones that are sold at Home Depot). Also for those who know AutoCAD's calculator, that's it's what I'm looking for but I don't want to have to open the whole Autocad program but just to get access quickly to the calculator.

Thanks for the help

My favorite is Free42 â€” An HP-42S Calculator Simulator. http://thomasokken.com/free42/

My favorite is Free42 — An HP-42S Calculator Simulator. http://thomasokken.com/free42/

SFR Calculator: OMG didn't Microsoft say in their guidelines not to use Ribbon interface on everything?

http://msdn.microsoft.com/dyni...

http://msdn.microsoft.com/en-u...

SFR Calculator: OMG didn't Microsoft say in their guidelines not to use Ribbon interface on everything?

http://msdn.microsoft.com/dynimg/IC208972.png

http://msdn.microsoft.com/en-us/library/cc872782.aspx#rightui

Hmmm, I guess if it works for us, then it's good design.

I actually created my own calculator a few years ago, because I needed something more powerful than Windows Calculator, and I had some cool ideas that I hadn't seen in a calculator before. And I'm still using it: http://go.tcx.be/calctor

I actually created my own calculator a few years ago, because I needed something more powerful than Windows Calculator, and I had some cool ideas that I hadn't seen in a calculator before. And I'm still using it: http://go.tcx.be/calctor