Distance conversion

[KlingGeofrey]

There are many units to calculate distance, I am working in construction industry, so calculating distance is very frequent. I still usually spend a lot of my time calculating and converting distance units. I am looking for a way to save time converting distance units. Is there a software on the phone or a website that can do that?
I often have to convert from centimeters to inches
, cm to feet, centimeters to inches,..vv
Can someone recommend me a solution to this problem?Thanks everyone

[mathematic]

Look for 'distance converter on line.  Pick one.