Calculate the percentage of any number out of any number. Great little tool to have on hand.
Compact Calculator - CompactCalc
CompactCalc is an enhanced scientific calculator for Windows with an expression editor. It embodies generic floating-point routines, hyperbolic and transcendental routines.
Calculator is very simple and easy to use. You can directly enter an expression to calculate, without having to click many buttons to input. It can remember the recent input expressions. And it's free for update forever!
Scientific Calculator - ScienCalc
ScienCalc is a convenient and powerful scientific calculator. ScienCalc calculates mathematical expression. It supports the common arithmetic operations (+, -, *, /) and parentheses.
GraphiCal is a programmable calculator with graphical output which lets you visualize expressions and formulas as graphs in a chart. It has more than 50 built-in mathematical functions, and can integrate and find roots and extrema of functions.
eJuice Me Up
This e-juice recipe calculator is free. Mix your own blend of e-liquids with Propylene Glycol (PG), Vegetable Glycerin (VG), H2O and Nicotine and find the desired nicotine strength and flavoring percentage. Measure by volume, percentage or drops.