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# Rack Unit

A rack unit (abbreviated U or RU) is a unit of measure defined as 1.75 inches (44.45 mm). It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed as multiples of rack units. For example, a typical full-size rack cage is 42U high, while equipment is typically 1U, 2U, 3U, or 4U high. Coincidentally, 1U is exactly equal to 1 vershok, an obsolete Russian measure of length.

Rack Unit
Symbol/abbreviation: ru
Unit of: LENGTH
LENGTH's base unit: meters (SI Unit)
In relation to the base unit (meters), 1 Rack Unit = 0.04445 meters.
[Conversion table] 1 Rack Unit (ru) to all length units
1 ru= 24.4999999999 agate [typography] (agate)
1 ru= 0.0748596276723 alens (aln)
1 ru= 444500000 angstroms (Å)
1 ru= 2.97129897585E-13 astronomical unit (au)
1 ru= 4.445E+16 attometers (am)
1 ru= 0.000376344086022 barleycorns (bcorn)
1 ru= 44450000000 bicrons (μμ)
1 ru= 839983597.171 bohr radius (Bohr)
1 ru= 0.00023985745614 cable length uk (cbl[UK])
1 ru= 0.000202546296296 cable length us (cbl[US])
1 ru= 175 calibers (cal)
1 ru= 175 centiinch (cin)
1 ru= 4.445 centimeters (cm)
1 ru= 0.0022095959596 chains (ch)
1 ru= 0.0972222222222 cubits (cbt)
1 ru= 0.004445 decameters (dam)
1 ru= 0.4445 decimeters (dm)
1 ru= 118.226819427 didot points (didot point)
1 ru= 2.33333333333 digits (digit)
1 ru= 0.0388888888889 ells (eel)
1 ru= 10.5393751054 ems (EM)
1 ru= 4.445E-20 exameters (Em)
1 ru= 0.0243055555556 fathoms (fath)
1 ru= 0.145833333333 feet (ft)
1 ru= 4.445E+13 femtometers (fm)
1 ru= 4.445E+13 fermi (fermi)
1 ru= 0.388888888889 finger cloth (finer)
1 ru= 0.141515440942 fods (fod)
1 ru= 0.00022095959596 furlongs (fur)
1 ru= 4.445E-11 gigameters (Gm)
1 ru= 0.00144318181818 greek plethron (pleth)
1 ru= 0.00024027027027 greek stadion (std)
1 ru= 0.4375 hands (h)
1 ru= 0.0004445 hectometers (hm)
1 ru= 4445 himetrics (hiMetric)
1 ru= 0.0234381116583 hvats (hvat)
1 ru= 1.75 inches (in)
1 ru= 4.445E-5 kilometers (km)
1 ru= 1.44037589112E-21 kiloparsecs (kpc)
1 ru= 1.71621621622E-15 light days (ld)
1 ru= 4.11955514365E-14 light hours (lh)
1 ru= 2.47081712062E-12 light minutes (lmin)
1 ru= 5.71998455797E-17 light months (lm)
1 ru= 1.4826551034E-10 light seconds (ls)
1 ru= 4.69823485889E-18 light years (ly)
1 ru= 21.1666666667 lines (l)
1 ru= 4.445E-8 megameters (Mm)
1 ru= 0.04445 meters (m)
1 ru= 1750000 microinches (μin)
1 ru= 44450 micrometers (μm)
1 ru= 44450000000 micromicrons (μμm)
1 ru= 2.76199494949E-5 miles (mi)
1 ru= 44.45 millimeters (mm)
1 ru= 1750 mils (mil)
1 ru= 4.445E-6 myriameters (Mym)
1 ru= 0.777777777778 nails cloth (nail)
1 ru= 44450000 nanometers (nm)
1 ru= 8.0003599712E-6 nautical leagues (Nl)
1 ru= 2.40010799136E-5 nautical miles (NM)
1 ru= 0.0583333333333 paces (pace)
1 ru= 0.583333333333 palms (palm)
1 ru= 1.44052639416E-18 parsecs (pc)
1 ru= 0.00883838383838 perch (perch)
1 ru= 4.445E-17 petameters (Pm)
1 ru= 10.5000000083 picas (p)
1 ru= 44450000000 picometers (pm)
1 ru= 168.000021165 pixels (PX)
1 ru= 2.778125E+33 planck length (pl)
1 ru= 125.99992063 points (pt)
1 ru= 0.00883838383838 poles (pole)
1 ru= 1 rack unit (ru)
1 ru= 10.5000013228 rems (rem)
1 ru= 0.00883838383838 rods (rd)
1 ru= 0.00125211267606 roman actus (actus)
1 ru= 0.00729166666667 ropes (rope)
1 ru= 4.445E-6 scandinavian miles (mil[Scandinavian])
1 ru= 0.194444444444 spans (span)
1 ru= 4.445E-14 terameters (Tm)
1 ru= 1750 thou (th)
1 ru= 2519.98412608 twips (twip)
1 ru= 0.0513279445727 varas [Argentina] (vr[Argentina])
1 ru= 0.0530301967421 varas [California] (vr[California])
1 ru= 0.0514467592593 varas [Latin America] (vr[Latin])
1 ru= 0.0530416935157 varas [Mexico] (vr[Mexico])
1 ru= 0.0531762172509 varas [Spanish] (vr[Spanish])
1 ru= 0.0524997933079 varas [Texas] (vr[Texas])
1 ru= 4.16666666667E-5 versts (vst)
1 ru= 443611003549 x unit (xu)
1 ru= 0.0486111111111 yards (yd)
1 ru= 4.445E+22 yoctometers (ym)
1 ru= 4.445E-26 yottameters (Ym)
1 ru= 4.445E+19 zeptometers (zm)
1 ru= 4.445E-23 zettameters (Zm)
1 ru= 1.75 zolls (zoll)