We all have a few go-to calculations that we find ourselves doing often, like converting ounces to cups or miles to kilometers—that sort of thing. When I need to do a quick conversion, I use ...

When I need a quick calculation, I fire up the Mac calculator, get it done, and don’t think about it much. But for complex calculations such as currency conversations or splitting bills, I reach for a ...

You can do fractions on your iPhone calculator using two different methods. When you turn your iPhone calculator sideways — switching it to a scientific-calculator layout — you'll be able to use more ...