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1-Calc is the revolutionary best-selling calculator for your PC. It's
big buttons provide clear audible & visual feedback of being
pressed. It has been designed to be your "everyday" calculator
that you can quickly pick up & use for a few basic
calculations. Simply tap on the system tray icon to launch it.
But 1-Calc is much more than this. It has more
features than would be found on a $150 graphing calculator in
the stores. The 2 lines of
buttons can be scrolled to display other functions including:
Basic Functions
The most common calculator functions at your
fingertips: +, -, x, ÷, +/-, 1/x, %, √, ³√, x², x³,
full memory functions, x^y, !, Exp, 10^x, e^x.
Backspace to edit mistakes, brackets to frame your
expressions correctly.
Also supports Algebraic, RPN & DAL calculator modes.
Currency Converter
1-Calc grabs the latest currency rates from the
Internet so wherever you are, you always have the latest
rates with you!
Unit Converter
A full unit converter that not only
helps for the everyday conversions (e.g. km/miles,
Fahrenheit/Celsius), but also for the unexpected (what's my shoe
size in Europe?!?).
Financial & Statistical
Functions
1-Calc includes popular financial
functions like Time Value Money, Percentage Change (%Δ),
Interest Rate Conversions, Depreciation, Profit Margin and Break
Even. Also solve statistics regression problems and convert
between dates.
Graphing Calculator
Get all the functionality of a $150
graphing calculator on your PC. Enter up to four
equations and see their paths plotted on the graph. Also does
quadratic equations.
Tip Calculator
Quickly work out who should pay when you're out with friends!
Memory Banks
1-Calc has 5 different memory banks to store your
last calculation, not just 1 like most usual calculators. Plus
it has copy / paste buttons to allow results to be copied to /
from other programs like Excel or Word.
Base converter
Quickly convert between binary, decimal, hex & oct.
Customization
Want to display all your buttons at the same time? No
problem! 1-Calc can display 40 smaller buttons on 1 page, and a
quick tap of the up/down button can display 80 more.
1-Calc also allows button groups to be customized so you can
display just the buttons important to your everyday
calculations.
Plus, 1-Calc has many different options to allow you to set
up 1-Calc for how you want it:
- Normal, fixed, scientific, engineering notation
- Display using regional settings
- Repeated equals
- Manually update currency figures
Skinning
1-Calc comes free with 18 different "skins" or designs:



Click here for details instructions on
how to make your own 1-Calc skin!

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