I consider myself pretty conversant in metric units. I know that 20 kilograms is 44 pounds (double it and add 10%) and that five kilometers is a little over three miles (I’ve, uh, run a lot of 5Ks).

In iOS 15, unit and currency conversions are handled by Spotlight, but in iOS 16 you can perform these and many other unit conversions anywhere in the operating system that you can select text. Keep ...