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  • Live tape recalculates automatically.
  • Make your own calculator! Create buttons for your unique calculations, or drag and drop buttons from other calculators into your own!
  • Context-sensitive help system answers any question on the spot.
  • Innovative and easy to use keyboard and mouse control allows you to use either or both modes of entry.
  • Standard, fixed, scientific, and engineering number formats.
  • Binary, Octal, Decimal, Hexadecimal, Hours-Minutes-Seconds, Dates, and Feet/Inches bases.
  • Algebraic, RPN, and 10-key entry notations give you the flexibility you need.
  • Unlimited memory buttons.
  • Current time and date buttons.
  • Calculates fractions, and keeps them in fractional form – an essential tool for Architects and other CAD users.
  • Print and save your tape.
  • Innovative SmartUnits that combine, cancel, and simplify your units for you.


PentaCalc Pro isn't just another calculator. It's a powerful application with a live tape that tracks every computation and recalculates after you make changes. It's the only calculator that allows you to create your own calculators and buttons. PentaCalc Pro combines all the calculators from every discipline into one comprehensive calculator and adds innovative features that will make you never want to go back to hand-helds.

PentaCalc Pro works just like your hand-held calculator, but it has all the power of a PC to back it up. If you have questions, an on-line, context-sensitive help system is available. When you're working on your PC, PentaCalc Pro makes your hand-held calculators, your 10-key adding machine, and other Windows calculators obsolete!

We have gone to great lengths to ensure that PentaCalc Pro works easily with the keyboard as well as with the mouse. And Algebraic, Reverse Polish (RPN,) and 10-key entry notations can be used in any calculator. Numbers can be easily copied and pasted into other applications so you don't have to write them down.

PentaCalc Pro has a uniquely designed interface that gives you unlimited options. Once you call up a calculator, it is completely re-sizeable and scalable. You also have the option of using multiple calculators at once. They will even snap together and move as a group. A choice of small, medium, large and extra large scales is available for easy adaptation to every monitor, screen resolution, and eyesight ability.

Live Tape Recalculates Automatically

Every calculation you make is automatically tracked on PentaCalc Pro’s computerized tape display. The tape is ‘live’ which allows you to make changes directly to the tape, and each modification will be reflected in your final result. For instance, if you are applying for a second mortgage on your home, you could perform a series of calculations to see how the numbers change with each new interest rate entered. What’s more, the tape can be printed and saved at your convenience.


Custom Calculating

PentaCalc Pro offers a feature never seen in a Windows calculator before – simple programmability. Whether you're an accountant, engineer, scientist, schoolteacher, or in charge of you family budget, PentaCalc Pro offers you the capability of creating the functions you need most. Simply pull up a new calculator and designate each button to a different calculation. If you can do the calculation on a hand-held, you can program it into your specialized calculator, it only takes a few quick steps. PentaCalc Pro allows you to drag any button you wish from one calculator and drop it onto another. You can combine buttons from many different calculators, or create your own buttons, which contain the calculations you perform most often.


Does Your Unit Conversions For You

A breakthrough feature called Smart Units™ allows you to perform calculations from a combination of units, then get your answer in a single equivalent unit. PentaCalc Pro’s unit conversions can be used to translate the square foot measurement of carpet required to fill your living room into square yards, or it can be used for much more complex conversions. For instance, if you multiply pounds by meters divided by seconds squared, you will receive an answer in newtons! PentaCalc Pro™ does your conversions for you, and guarantees unit consistency! Over 570 unit buttons and 45 separate unit types are included. You can even add your own units. Here are just a few unit calculators from our extensive list:

  • Area
  • Mass
  • Length
  • Volume
  • Currency
  • Resistance
  • Momentum
  • Temperature
  • Density
  • Power
  • Velocity
  • Energy
  • Pressure
  • Voltage
  • Radioactivity