Either. Length is just the distance from one end to the other.
I assume you are asking which units of measure. Length and distance are arithmetically the same, though differ in meaning, so then you would use the units appropriate to the scale of what you are measuring, for either purpose.
So for very small lengths: inch or millimetre.
Larger sizes - perhaps the foot or yard / metres. (The centimetre is in common use for, e.g., clothes sizes, but is not one of the SI system's "Preferred units" and is not used in science and engineering, with a very few exceptions.)
Travel and land-measurement scales: yards / metres, and miles / kilometres. The Nautical Mile for marine and air navigation, because it is related to longitude and is the basis of the Knot (kt) speed unit.
Curiously the railways in Britain, where the Statute Mile and Yard remain the only legal road and railway distance units in a mainly-metric country, still use the Chain (22yd) and Yard, particularly I think for curve radii and tunnel lengths.
Those spellings ending in "tre" are correct - they are the French names, of units that were invented in France.
I have seen this type of question muddled up with an algebraic technique called Dimensional Analysis, so will note it here. It is NOT for unit conversions, but is for testing the construction of complicated multi-dimensional formulae and calculations. In it, "length" is simply physical extent or distance, so length, width and height are all just "Lengths". "Dimension" in this context does have the everyday meaning as on a workshop drawing, but is the type of measured variable, so for example [Speed = Distance / Time] has 2 dimensions: length and time.
The metre (meter in the USA) is the base unit of length in the metric system. It is equal to the distance light travels in a vacuum in a time interval of 1/299792458 of a second.
'km' stands for kilometers and is a measure of length or distance in the metric system. One km equates to about 0.621 mile.
The unit for length and distance is the same. It is the meter (m).
1 kiloton is a unit of explosive energy equivalent to 1,000 metric tons of TNT. It measures the power of an explosion. Mile, on the other hand, is a unit of distance that measures how far something is. These two units measure completely different quantities - one measures energy and the other measures distance.
By unit of length and distance and conversion ,we can say that miles measure distance.
ruler
The shortest SI unit of length is a yoctometre - there are 1000000000000000000000000 of them in one metre.
The 'kilometer' is a unit of length or distance in the metric system.
Miles or Kilometers are the usual measures of distance when dealing with highways and roads.
These units are not compatible to each other. canal is not the measurement unit while hectare is a measurement unit that measures length and distance.
The metre (meter in the USA) is the base unit of length in the metric system. It is equal to the distance light travels in a vacuum in a time interval of 1/299792458 of a second.
By unit of length and distance and conversion ,we can say that SI basic unit of length is meters.
You can use any unit of length, such as meters or millimeters.
it measures length or distance. a meter is 39 inches.
'km' stands for kilometers and is a measure of length or distance in the metric system. One km equates to about 0.621 mile.
By unit of length and distance and conversion ,we can say that basic SI unit of length is km .
By unit of length and distance and conversion ,we can say that S I you unit of length is meters (m).