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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= 24.499999999942 agate [typography] (agate)
1 ru= 0.074859627672295 alens (aln)
1 ru= 444500000 angstroms (Å)
1 ru= 2.9712989758483E-13 astronomical unit (au)
1 ru= 4.445E+16 attometers (am)
1 ru= 5.25 barleycorns (bcorn)
1 ru= 44450000000 bicrons (μμ)
1 ru= 0.00055239898989899 blocks (bl)
1 ru= 839983597.1707 bohr radius (Bohr)
1 ru= 0.00023985745614035 cable length uk (cbl[UK])
1 ru= 0.0002025462962963 cable length us (cbl[US])
1 ru= 175 calibers (cal)
1 ru= 175 centiinch (cin)
1 ru= 4.445 centimeters (cm)
1 ru= 0.002209595959596 chains (ch)
1 ru= 0.097222222222222 cubits (cbt)
1 ru= 0.004445 decameters (dam)
1 ru= 0.4445 decimeters (dm)
1 ru= 118.2268194271 didot points (didot point)
1 ru= 2.3333333333333 digits (digit)
1 ru= 1.11125E-9 earth circumference (Ec)
1 ru= 1.1563415382854E-10 earth to moon distance (EM d)
1 ru= 0.038888888888889 ells (eel)
1 ru= 10.539375105394 ems (EM)
1 ru= 4.445E-20 exameters (Em)
1 ru= 0.024305555555556 fathoms (fath)
1 ru= 0.14583333333333 feet (ft)
1 ru= 44450000000000 femtometers (fm)
1 ru= 44450000000000 fermi (fermi)
1 ru= 0.38888888888889 finger cloth (finer)
1 ru= 0.14151544094238 fods (fod)
1 ru= 0.00048611111111111 football field length [US] (fbf[US])
1 ru= 0.0002209595959596 furlongs (fur)
1 ru= 4.445E-11 gigameters (Gm)
1 ru= 0.0014431818181818 greek plethron (pleth)
1 ru= 0.00024027027027027 greek stadion (std)
1 ru= 0.4375 hands (h)
1 ru= 0.0004445 hectometers (hm)
1 ru= 4445 himetrics (hiMetric)
1 ru= 0.018520833333333 horse length (hl)
1 ru= 0.023438111658257 hvats (hvat)
1 ru= 1.75 inches (in)
1 ru= 4.445E-5 kilometers (km)
1 ru= 1.4403758911212E-21 kiloparsecs (kpc)
1 ru= 1.7162162162162E-15 light days (ld)
1 ru= 4.1195551436515E-14 light hours (lh)
1 ru= 2.4708171206226E-12 light minutes (lmin)
1 ru= 5.7199845579719E-17 light months (lm)
1 ru= 1.4826551034023E-10 light seconds (ls)
1 ru= 4.6982348588944E-18 light years (ly)
1 ru= 21.166666666667 lines (l)
1 ru= 1.1563415382854E-10 lunar distance (LD)
1 ru= 4.445E-8 megameters (Mm)
1 ru= 0.04445 meters (m)
1 ru= 0.14816666666667 metric foot (mf)
1 ru= 1750000 microinches (μin)
1 ru= 44450 micrometers (μm)
1 ru= 44450000000 micromicrons (μμm)
1 ru= 2.7619949494949E-5 miles (mi)
1 ru= 44.45 millimeters (mm)
1 ru= 1750 mils (mil)
1 ru= 4.445E-6 myriameters (Mym)
1 ru= 0.77777777777778 nails cloth (nail)
1 ru= 44450000 nanometers (nm)
1 ru= 8.0003599712023E-6 nautical leagues (Nl)
1 ru= 2.4001079913607E-5 nautical miles (NM)
1 ru= 0.058333333333333 paces (pace)
1 ru= 0.58333333333333 palms (palm)
1 ru= 1.440526394158E-18 parsecs (pc)
1 ru= 0.0088383838383838 perch (perch)
1 ru= 4.445E-17 petameters (Pm)
1 ru= 10.500000008268 picas (p)
1 ru= 44450000000 picometers (pm)
1 ru= 168.00002116536 pixels (PX)
1 ru= 2.778125E+33 planck length (pl)
1 ru= 125.99992062997 points (pt)
1 ru= 0.0088383838383838 poles (pole)
1 ru= 1 rack unit (ru)
1 ru= 10.500001322835 rems (rem)
1 ru= 0.0088383838383838 rods (rd)
1 ru= 0.0012521126760563 roman actus (actus)
1 ru= 0.0072916666666667 ropes (rope)
1 ru= 4.445E-6 scandinavian miles (mil[Scandinavian])
1 ru= 2.971256684492E-19 siriometer (sir)
1 ru= 0.19444444444444 spans (span)
1 ru= 4.445E-14 terameters (Tm)
1 ru= 1750 thou (th)
1 ru= 2519.9841260842 twips (twip)
1 ru= 0.051327944572748 varas [Argentina] (vr[Argentina])
1 ru= 0.053030196742149 varas [California] (vr[California])
1 ru= 0.051446759259259 varas [Latin America] (vr[Latin])
1 ru= 0.053041693515668 varas [Mexico] (vr[Mexico])
1 ru= 0.053176217250867 varas [Spanish] (vr[Spanish])
1 ru= 0.0524997933079 varas [Texas] (vr[Texas])
1 ru= 4.1666666666667E-5 versts (vst)
1 ru= 443611003548.89 x unit (xu)
1 ru= 0.048611111111111 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)