# Spatial dimension

A room measure or measure of capacity is a unit of measurement for specifying the size of a volume - (expansion in three dimensions ). Room dimensions are used to determine the volume of liquids or bulk goods (e.g. grain, flour, etc.)

## units

According to the International System of Units (SI) , units of measurement for volume are derived from the meter and its parts as well as multiples. The basic unit of volume is the cubic meter :

1 m 3 = 1 m • 1 m • 1 m.

Since there are three in the calculation of a spatial content always length dimensions are multiplied together, room dimensions length dimensions are in the third power ( cubic , cubed ). For this reason, a tenfold increase in all three length dimensions results in a thousandfold increase in the spatial dimension. Accordingly, the conversion number from the cubic meter to the next smaller or larger SI-compliant multiple or fraction of a thousand : z. B. 1 cubic meter = 1000 cubic decimeters , 1 cubic decimeter = 1000 cubic centimeters , 1 cubic centimeter = 1000 cubic millimeters , see prefixes for units of measurement .

The cubic decimeter (1 dm 3 ) has been given the special name liter .

## comparison

Volume measurements
Unit of measurement cubic meter liter Reference size use
1 cubic meter = 1 = 1000 Base unit in the SI
1 barrel = 0.158 987 294 928 = 158.987294928 = 42 gallons (US) = 9702 cubic inches z. B. for petroleum
1 cubic foot = 0.028 316 846 592 = 28.316864592 = 1728 cubic inch
1 cubic decimeter = 0.001 = 1
1 liter = 0.001 = 1
1 gallon (US) = 0.003 785 411 784 = 3.785411784 = 8 pint (US) = 231 cubic inch
1 pint (US) = 0.000 473 176 473 = 0.473176473
1 cubic inch = 0.000 016 387 064 = 0.016387064
1 cubic centimeter = 0.000 001 = 0.001

## Forestry and timber industry

• Solid meter (fm)
• Yield cubic meters (Efm)
• Storage cubic meter (Vfm)
• Cubic meter (rm), also ster (pile wood ) = 0.7 m 3 (layered wood mass with air gaps)
• Bulk meters, also loose cubic meters (poured wood mass with air gaps)

## history

In the past, a distinction was made between capacities for liquids, which are called liquid measures, and capacities for solids, which are called dry measures . The liquid and dry dimensions were also partly varied. So was z. In many areas of Germany, for example, a distinction is made between dry measurements for measuring heavy or smooth fruit on the one hand and light and rough fruit on the other. For the differentiation of liquid measures according to the measured good, namely wine or beer , see e.g. B. gallon .

For the historical difference between liter and cubic decimeter, see the detailed history of the definition of liter .

Period 1 liter (definition)
1793-1900 = 1 cubic decimeter
1901-1963 ≈ 1.000028 cubic decimeters
since 1962 = 1 cubic decimeter