Calcute is a Free and Compact yet Capable Tape Calculator. More advanced than standard calculators, it is actually an expression evaluator that lets you process arbitrarily complex numeric expressions like: -ln(1+2) * 3% + sin(4 5\6)^7. As shown in this example, you can even enter an exact fractional value like 4 5\6 instead of a decimal approximation like 4.83333333333... Arithmetic software routines are used to prevent common rounding errors associated with computer hardware.