meter & centimeter
9kg ************ Surely, it depends on the size (dimensions) and the material the desk is made from (oak weighs heavier than chipboard), as to what the total weight is? For instance, a school desk for a single pupil, will weigh (approximately) half as much as a dual-desk for two pupils. A desk used in the office of a director of a large company, would weigh even more!
Tape measure and centimetre.
For a desk like one used in schools the best unit would be pounds. Good luck on your measuring!
Inches or centimeters, depending on where you live.
Meters, centimeters, or millimeters. Take your pick.
I would use a ruler or a tape measure. After I was done, I would express the measurement in centimeters or inches.
Kilograms * * * * * No you would not! A kilogram is a measure of mass. Weight is measured in Newtons!
You would probably measure a keyboard in centimeters (cm).