eCalc – an online calculator
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I stumbled across a great online calculator called eCalc that would be useful for amateur radio work. It is available in both standard and scientific format. The scientific format includes a quick unit conversion calculator, useful for converting lengths from metres to feet, or vice versa. It also has some advanced mathematical features including complex numbers and conversion in to phase and magnitude. If you want you, can even use reverse Polish notation! See the eCalc demonstration video for more information.
A useful tool to have bookmarked in your browser