If you need to convert currency while traveling but don't want to download yet another app to your iPhone, use this handy ...

The calculator’s “C” button—the one that clears input—was gone. The “C” itself had been cleared. The “C” button’s function is vestigial. Back when calculators were commercialized, starting in the ...

Convert hundreds of different oilfield units of measurement using the calculator below. You can also bookmark this page or learn about the units of measurement that can be converted.