Here are some key features of "Calculator++":

Funtions:
· Scientific: trigonometric (inverse and hyperbolic), logarithmic, exponential (bases 2 through 36 and base e), etc.
· Algebraic: square, cube, nth power, square root, cube root, nth root, percentage, etc.
· Factorial: factorial, permutations, combinations
· Statistics: mean, sum of squares, standard deviation, process capability, etc.
· Binary: and, or, xor, not, left shift, and the inverses.
· Memory: last, X↔Y, X↔M, M+, MS, etc. with standard single-variable memory, and unlimited-variable memory using statistics data storage

Bases:
· All display formats are displayed in the current base. Yes, even degrees-minutes-seconds.
· Floating point (real) numbers are displayed in the current base, including the fractional portion. Yes, that's correct.
· Exponents are entered and displayed in the same base as the mantissa. Your eyes don't deceive you. You read it correctly.
· Results of unit conversions are displayed in the current base.
· Statistical data are displayed in the current base.
· In fact, the result of all functions are displayed in the current base.
· Arbitrary precision works for all bases.

Display Format:
· Floating Point: Unless the decimal point won't otherwise be displayed, all digits and the decimal point are displayed. Example: 12345.6789
· Fixed Point: Unless the decimal point won't otherwise be displayed, all whole number (integer) digits, the decimal point, and the user-specified number of fraction digits are displayed. Example: User sets 2 fixed digits: 12345.68
· Scientific: The most significant digit, followed by the decimal point and as many fraction digits will fit in the display ended with "e" and the exponent. Example: 1.23456789e+4
· Engineering: The most one to three significant digits, followed by the decimal point and as many fraction digits will fit in the display ended with "e" and the exponent. The exponent is always a multiple of three. Example: 12.3456789e+3
· Degrees-Minutes-Seconds: The whole number (integer) digits, followed by the degree symbol, the number of minutes (0-59), the minutes symbol, the number of seconds (0-59), the seconds symbol, then any fractions of seconds. Example: 12345°40'44"04
· Hours-Minutes-Seconds: The whole number (integer) digits, followed by a colon, the number of minutes (0-59), a colon, the number of seconds (0-59), the decimal point, then any fractions of seconds. Example: 12345:40:44.04

Unit Conversion:
· Currently, Calculator++ supports over 20,000 units in over 20 categories for conversion. Original and converted values are kept in separate displays. This is handy when converting a value to different units. Currency data used for conversions are downloaded from five highly respected original data sources; not third-party distributors. This extensive list will continue to expand, so be sure to return to this site for updates.

Precision:
· Calculator++ does not use approximations of constants for calculations, as is customary for every other conversion calculator we've seen so far. When a constant has digits that inherently are within a margin of error, the margin of error digits are truncated. Thus, when converting a unit, the result is accurate to the precision specified by the user.

Logic:
· Simple Algebraic Notation, Algebraic Notation, and Reverse Polish Notation (RPN) are currently supported.

Requirements:

· Java Runtime Environment 6.0 or later