Instead of the traditional look of many buttons, Equalizer has a simple text line on which you can write the expression in the same way you'd write it on paper (for example: typing "(6*5-12) / 2" will show the answer "9"). Equalizer can also draw graphs of equations. In addition, Equalizer is fully skinable - you can completely change its appearance, and even create your own skins.

Download Equalizer 1.77 in Softonic

Excalibur is a freeware full-featured RPN-only calculator with 300 functions (scientific, business, conversion, computer science, physics, complex numbers, geometry, vectors, etc), full 4 or 8-level stack, international support for different comma and decimal point formats, programmable, macros, registers, custom button banks, etc. It's difficult to find a freeware calculator so powerful!

Download Excalibur 2.0 in Softonic

The Mother of all Calculators, a Swiss Army knife for scientists and engineers. Perhaps the most capable scientific/engineering calculator for Windows. On one hand, this is a calculator: it evaluates expressions with more than 100 functions (trig/inverse, log/exp, statisical distributions, Euler, conditional, user-defined). Expressions are entered in the customary algebraic notation, and then simply calculated. After computing the value, an expression can be modified or corrected, and recomputed at will.

There ara also unit conversions, physical constants, computer math (binary, octal, hex), and function graphs included. For more advanced users, Kalkulator provides less trivial operations: numerical integration and differentiation, interpolaton (linear or cubic spline), statistics (mean, s.d., histograms, polynomial regression), column operations on stat data, polynomial roots, linear algebra (vector/matrix operations and systems of linear equations).

Hard-to-find features: systems of non-linear and differential (ODE) equations, multi-argument function extremum search and point or histogram fitting which includes an arbitrary function. Most importantly, advanced features don't obstruct the basic ones. You can use as much of Kalkulator's capabilities as you need, without being hampered by program capabilities you do not need. Disk save/restore, Help file and other niceties are also included.

Kalkulator has been evolving on various OS platforms for the last 15 years, being refined and polished through all this time, and its author has more than 25 years of active experience in numerical methods and software development.

Download Kalkulator 2.50 in Softonic

If you're one of those mad scientists who don't have enough with the Windows calculator, then SpeedCrunch is for you.

This powerful advanced calculator lets you perform many mathematical tasks with an up to 50 decimal precision which I personally find impressive. Also, instead of a tiny rectangular screen like the one you find in real calculators, SpeedCrunch features a huge, blank space where all your operations are conveniently saved, so that you can review your calculations at any time.

SpeedCrunch supports on-the-fly calculations, includes more than 50 built-in math functions and can be easily customized. You can use it with its virtual keyboard or your own physical PC keyboard, though math functions can only be entered from the virtual one. It would have been a great idea to create shortcuts for those functions.

With SpeedCrunch you can easily perform many different maths calculations and functions with a high precision and the possibility to review results at any time.

Download SpeedCrunch 0.10.1 in Softonic

Math ScriptConsole (MSC) lets you do mathematical calculations using scripts and commands in a console-based multiple-window interface. You can either run single commands interactively or run a batch of commands from a script file. It's an ideal replacement for windows calculator which is too simple for scientists and engineers. Math ScriptConsole is under the power and flexibility of Microsoft VBScript engine. It includes extra functions and libraries specifically designed for scientists and engineers.

What's more, it's very easy to add your own functions and create your own libraries. Math ScriptConsole has the same scripting and programming capability and console interface as matlab but this one is much lighter and faster to launch than matlab. If you don't need all the powerful toolboxes in matlab, Math ScriptConsole is a very good alternative choice. In Math ScriptConsole, you can also run DOS commands, shell commands and a set of built-in commands. This can save you the trouble of entering black DOS boxes or opening Windows run dialog.

Features:

• Convenient and error-proof MDI-based console interface
• Same scripting and programming capability while lighter than matlab
• You can use both interactive commands or run pre-stored script files
• You can define your own libraries of functions and subs
• Built-in libraries on math, statistics and file I/O.
• Powered by Microsoft VBScript Engine
• Object-oriented scripting with support of COM/ActiveX technology
• Built-in script editor supporting syntax highlighting
• Ability to run DOS/system built-in commands
• Ability to run any executables accessible by PATH environment variable
• Shell Integration with Windows Explorer

Download Math ScriptConsole 1.0 in Softonic

I'm no mathematical genius but SpeQ is a rare example of a mathematical calculator that's easy enough for even dunces to calculate complex calculations.

SpeQ is an extremely small but powerful mathematical calculator with an intuitive interface, that makes it clear how to perform just about any calculation. It allows you to add, edit and execute calculations in a few seconds and supports all the common functions you require in a calculator.

Although SpeQ is aimed at those studying maths at an advanced level, anyone that's studying the subject will find something of use in it. If you want to take it with you to school or university, you can also run it directly from a USB stick which gets around those annoying download and install restrictions in most educational institutions. SpeQ is particularly useful for engineers or simply those looking for a slightly more powerful version of Windows calculator.

Quick, simple and packed with functions, if I'd had SpeQ at school, I'd probably have worked out the meaning of life.

Download SpeQ 3.3 in Softonic

Hexit is a simply designed, easy-to-use calculator that enables you to convert between different number systems on the fly.

Its interface displays whichever value you enter in the decimal, hexadecimal and binary systems, performing the conversion on the fly as you type. Well, you actually have to click on the number buttons; at least I couldn't find any way to use the keyboard and type numbers instead, and I found this pretty annoying.

In all, this is a simple calculator that enables you to perform simple maths operations and logic functions, and hardly uses system resources. It doesn't even require installation.

Download Hexit 1.5 in Softonic

Trying to get pregnant can sometimes be like playing snooker in the dark. You never know when you're going to eventually hit the bullseye during that all important ovulation period. Pregnancy calculator helps you plan the optimum time not only to conceive, but also for the important milestones in your pregnancy.

For example, once you've entered your personal data, Pregnancy Calculator can predict the probable date of conception, the start date of the second and third trimesters and even the date that offers the best survival rate for your baby. It also calculates the dates that most babies may arrive between and more obvious things that you should know anyway - like how many weeks and days you are pregnant and how many weeks and days you have left until that special day. All this is accompanied by a few baby sound effects and options to print the most important data.

For those that really like to hit the nail on the head, you can even tell Pregnancy Calculator on which day you want the baby to be born (useful if you are trying to give birth around a major holiday or event), and it will advise you on exactly what day you'll need to have a shot at conceiving. Much of what this program offers most parents to be should be able to calculate anyway but if you have busy lives or are bad with dates, it could make the process a while lot more fun.

Download Pregnancy Calculator 2.72 in Softonic

We all are worried about climate change and whether this is linked to the pollution we produce. People are now more sensitive about how many carbon emissions their lifestyle produces. It is difficult though to have an idea about how green our choices are and what we can allow ourselves per year in terms of air travel, for example.

With The Carbon Footprint Calculator you can actually calculate your impact on the environment. You can roughly insert the total distance you drive and you travel by air, bus or train in one year. Swap between the metric and the English unit measurement system if you prefer. In the Energy Section you can specify the Electricity, the natural gas and the fuel oil used monthly, together with the State (US) where you live and the number of people who live with you. Then comes the recycling and activities section where you have to select the type of recreation you do, the buying habits and the percentage of trash you recycle. Finally, you will have to specify the percentage of food or items you buy that are grown or produced locally. I found it difficult to quantify the amount of food I eat each day in Kg. I've never thought about it and I was astonished to know that we eat between 25 to 75kg per day.

A detailed Footprint Result is shown after pressing the black footprint icon on top of the main form. It shows the amount of Co2 we produce in a coloured cake chart. You can compare it with the information provided underneath it, in which it states the average emission per person in US, which is about 20tons of Co2 per year, while the for EU citizens it's around 11 tons. Whether your personalised results will make you feel a bit guilty or proud of your lifestyle, remember you can always offset the emission you produce by supporting specific schemes. A selection of those, found on the Tufts Climate Initiative web site is: Carbonfund, The CarbonNeutral Company, Cleanairpass, Climate Care, Solar Electric Light Fund and TerraPass.

This basic application allows you to keep a track of your energy consumption and calculate your carbon emissions. Unfortunately, it doesn't allow you to create graphs comparing the results of different years and it doesn't give you any advice on how you can have a greener lifestyle based on your lifestyle.

Download The Carbon Footprint Calculator 1.0 in Softonic

ESBCalc is a Win32 Scientific Calculator with Infix Notation, Brackets, Scientific Functions, Memory, Optional Paper Trail, Result History List, Customisation of the Colours & Fonts used, Customisation of the Hints, and more.

Functions include Trigonometric, Hyperbolic, Logarithmic - Base 10, Base 2 & Natural - and many more. Now includes Prefix Function support so that Log (1.3) can be entered as log 1.3 rather than as 1.3 log which is the default behaviour. Looks best with Windows XP in 800x600 (or better) and 32-bit colour. Now with improved Large Font Support.

Download ESBCalc Pro 6.2.3 in Softonic

Mortgages are the current most common nightmare for families, who struggle to make ends meet in any way. If you're in this situation, this program may help you.

Bear in mind that Mortgage APR Calculator is not a magical cure for your financial problems, as it's clearly stated on its disclaimer. Take it just as a tool to calculate possible advantages and disadvantages before taking any decision about your financial situation. Mortgage APR Calculator only needs a few data to calculate the annual percentage rate and therefore obtain the true cost of a mortgage. It's easy to use and works very fast.

The program displays a tabbed interface but you may simply stick to the first one, as the other two are ads which make it a bit confusing. In fact I had the feeling that they were trying to fool me. Also, I had problems when trying to close the program: it showed an error message and I had to close it from the Task Manager window.

With Free Mortgage Loan APR Calculator you can quickly find which mortgage is more convenient for you in financial terms.

Download Free Mortgage Loan APR Calculator 4.0 in Softonic

ProKalc is a full-featured scientific/financial calculator with scrolling tape. Using a point-and-click interface, you enter data for trig, exponential, scientific, and amortization problems and get immediate answers, with your input reviewable on tape. You can print results to the Clipboard, a file, or a printer. Ten editable memory locations, online context-sensitive help, and pop-up work screens for complex calculations. ProKalc features 15-digit accuracy in scientific mode along with multi-pane financial and geometry modules to ease calculations.

Download ProKalc 7.9b in Softonic

The Amortization Schedule Calculator calculates the amortization, or loan repayment, schedule for a loan. The calculated amortization schedule shows the principal amount, interest amount, and remaining balance, as well as total interest, total payments, and final payment date. The Amortization Calculator is a tool for estimating your loan budget and understanding amortization schedules before you ever have to deal with a mortgage broker.

Download Amortization Schedule Calculator 1.0 in Softonic

Helpful utility to provide gestation information and provide the estimated birthing date for a large list of animals. A must for veterinarians and animal support help desks. Students of animal sciences will find this program very useful.

A partial list of animals supported include:

• African Rhinoceros
• Cat
• Cow
• Coyote
• Ferret
• Goat
• Llama
• Pig
• Skunk
• Yak

Download Animal Gestation Calculator 1.0 in Softonic

Algebrus is meant for everybody who needs to do either scientific analysis or just doing school homework. It provides user with numerous mathematical and analysis functions as well as allows unlimited extension of its functionality by means of user-defined types, constants, operators, routines, and libraries.

Its extensibility is based on a built-in simple to learn and yet powerful programming language XPascal. Algebrus can be used both as a simple "evaluate-while-typing" calculator and as a powerful mathematical analysis application, which includes 2D and 3D graphic plots of functions and data, command line execution console, and a syntax-highlighted XPascal editor as a part of the integrated development environment (IDE).

Calculations include:

• Vector and matrix operations and functions
• 2D and 3D graphic plots of function and data
• More than 50 built-in mathematical functions
• User-programmed procedures and functions
• User-defined types and operators
• Solving of linear algebraic systems
• Solving of ordinary differential equations
• Inversing matrices, Fourier analysis
• Statistical data analysis

Using special Plotter tool, creating 2D and 3D graphic plots of functions requires no programming skills whatsoever. Evaluator tool allows simple and interactive evaluation of functions and procedures. It fully supports interfaced constant declarations that appear in the Evaluator as Parameters section

Download Algebrus 3.2 in Softonic

Moffsoft Calculator has a simple, easy-to-use interface that allows a user of any level to start crunching numbers immediately, but don't be deceived by its simple appearance. The power that lies within is only a click or two away.

In addition to the printable and savable calculator tape, you'll discover powerful financial functions that include the time value of money, amortization schedules, bonds, interest rate conversions, cash flow, and depreciation. You'll also find over 100 unit conversions in categories such as length, volume, weight, area, speed, time, temperature, currency, and data storage.

Moffsoft Calculator also has a variety of date and time calculations that will determine the day of the week, the week of the year, the difference between two dates, and much more. Use the product pricing functionality to calculate cost of goods sold, profit margin, retail sales price, and gross profit. You can also markup and markdown a product's price to quickly assess the impact on your profit.

You can disable or hide unused buttons, and change the color and font of almost everything. Select one of our color schemes or create and save your own. You can even export your favorite schemes to share with a friend. The main calculator window can also be sized. Make it very small to conserve desktop space, or make it very large for readability. Make it any size you want and Moffsoft Calculator will remember the size and position next time you use it.

Other user options include floating point and fixed decimals, item count, multiple memory values, constants, system tray icon, always on top, feedback with sound, run on startup, and much more. You can also select the calculator input logic that's most natural for you. Algebraic input works like a standard hand-held calculator, while adding machine input functions similar to a desktop 10-key.

Download Moffsoft Calculator 2.1.1 in Softonic

I must admit I'm a very math-challenged person. Numbers were my main weakness at school and even nowadays I have problems to check if my change is correct when I'm shopping. But this doesn't mean I can't appreciate a tool like Math Solver.

This amazing program helps you solve all kinds of mathematical problems, from a simple addition to a complicated geometrical function. Not only does it solve the operation, but also draws a graph based on it if possible, and gives extra information about the generated graph. The program also includes an excellent database with constants and functions.

On the downside, I think Math Solver is not really comfortable to use. Solving expressions and representing functions take too many clicks. Also, as each piece of information is offered in a separate window, your desktop can get really messy. Besides, Math Solver keeps a history of previously entered expressions so that you can review them or reuse them at any moment, but unfortunately they're not saved when you quit the program.

Download Math Solver II 1.1 in Softonic

CCCalc is a very simple calculator that outstands for its original interface, more similar to a school notebook than to a standard PC calculator.

You can customize the background, the text font type and other customization options. As for the mathematical capabilities of the program in itself, we must admit they're pretty simple – they're limited to the basic arithmetic calculations such as adding or subtracting.

In a way we could say that CCCalc is more focused on creating a more user-friendly interface to the standard calculator than on providing more functionalities in order to make it a more complete tool.

If you're looking for a nicely designed calculator, CCCalc is for you; if what you need is a powerful scientific tool, you should look somewhere else.

Download CCCalc 1.5.44 in Softonic

If you often have to plot graphs, then this program allows you to produce high quality 3D graphs with relative simplicity. Graphs can be shaded with custom gradual colors along the X, Y or Z axis. In 3D graphs, the lighting is enabled to demonstrate the depth of the surface through shades and shadows. The Graphing Calculator performs mathematical calculations and then illustrates the results in 3D drawings.

The interface is divided into three sections. The first represents written equations. The second is a keypad to enter into all kinds of mathematical elements. Finally you have the graphics screen that can be customized with colors. You can also manipulate graphics by rotating them into any position.

For scientists, mathematicians and teachers, this program gives an extra touch of class to presentations or teaching material.

Download Graphing Calculator 3D 2.3 in Softonic

AllerCalc, previously know as VersaCalc, is an advanced calculator which allows you to perform complex scientific calculations that other calculators can't handle.

The calculator works with a rotating screen that stores your last calculations and results. It supports more than forty functions including algebraic, transcendental, trigonometrical, hyperbolic and financial. Chances are that if you can't solve a mathematical equation with this calculator, then you won't be able to solve it with anything.

AllerCalc also includes different options that allow you to choose the sources, format (general or scientific) and select the number of decimals to visualize. You can even make metric conversions and much much more. A powerful calculator for that need some serious mathematical power.

Download AllerCalc 2.11 in Softonic