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French
Symbol:  fr 
Category:  Length 
SI Equivalent:  3.33333×10-4 m
Dimension:  L 
System:  French 
 
Notes
French is a unit for measuring small diameters such as bubules, catheters, and fiber optic bundles.
1 fr = 1/3 mm
Convert     fr  
1 fr =
Length
  Symbol Unit Name
6.29909×106  a.u., a0, b  a.u. of length 
3.33333×106  Å  angstrom 
1.14592  arcmin  arcmin 
2.2282×10-15  AU, UA  astronomical unit 
3.33333×1014  am  attometer 
3.93701×10-2    barleycorn (UK) 
6.29909×106  a0, b  bohr (first Bohr radius) 
9.11344×10-6    bolt (US cloth) 
0.15748  line (UK)  button (UK) 
0.524934  line (US)  button (US) 
1.79986×10-6    cable length (int.) 
1.79871×10-6    cable length (UK) 
1.51891×10-6    cable length (US) 
1.31234  caliber, cin  caliber (centiinch) 
3.33333×10-2  cm  centimeter 
1.09361×10-5  ch  chain (engineer's) 
1.65699×10-5  ch  chain (Gunter's) 
1.09361×10-5  ch  chain (Ramsden's) 
1.65699×10-5  ch  chain (surveyor's) 
7.29076×10-4    cubit (UK) 
3.33333×10-5  dam  decameter 
3.33333×10-3  dm  decimeter 
1.1829×1011  re  electron classical radius 
2.9163×10-4    ell 
7.90358×10-2    ems (pica) 
3.33333×10-22  Em  exameter 
1.82269×10-4  fath  fathom 
3.33333×1011  fm  femtometer 
3.33333×1011  F, f  fermi 
6.29909×106  a0, b, a.u.  first Bohr radius 
1.09361×10-3  ft  foot 
1.65699×10-6  fur  furlong (UK) 
1.65699×10-6  fur  furlong (US) 
3.33333×10-13  Gm  gigameter 
3.28084×10-3  hd  hand (UK) 
3.33333×10-6  hm  hectometer 
3.52341×10-29    hubble 
1.31234×10-2  in  inch 
3.33333×10-7  km  kilometer 
1.08026×10-23  kpc  kiloparsec 
6.9056×10-8    league (Canadian) 
5.99952×10-8  leag. (int. naut.)  league (int. naut.) 
6.90412×10-8  leag. (stat.)  league (statute, land) 
5.99569×10-8  leag. (UK, naut.)  league (UK, naut.) 
5.99569×10-8  leag. (US, naut.)  league (US, naut.) 
1.2869×10-17    light-day 
3.08856×10-16    light-hour 
1.85313×10-14    light-minute 
1.11188×10-12    light-second 
3.52341×10-20  ly  light-year 
0.15748  line (UK)  line (UK) 
0.524934  line (US)  line (US) 
1.09361×10-3    link (engineer's) 
1.65699×10-3    link (Gunter's) 
1.09361×10-3    link (Ramsden's) 
1.65699×10-3    link (surveyor's) 
3.33333×10-10  Mm  megameter 
3.33333×10-4  m  meter 
1.31234×104  µin  microinch 
333.333  µm  micron 
13.1234  mil, thou  mil (thou) 
4.4914×10-8  mile (geogr.)  mile (geographical) 
2.07123×10-7  mi (int.)  mile (international) 
1.79986×10-7  mi (naut., int.)  mile (nautical, international) 
1.79664×10-7  mi (naut., teleg.)  mile (nautical, telegraph) 
1.79871×10-7  mi (naut., UK, US)  mile (nautical, UK, US) 
2.07124×10-7  mi (stat.)  mile (statute, land) 
2.07123×10-7  mi (survey, US)  mile (survey, US) 
0.333333  mm  millimeter 
3.33333×105  mµ, nm  millimicron 
1.45815×10-3    nail (UK) 
3.33333×105  nm  nanometer 
1.79986×10-7  mi (int. naut.)  nautical mile (international) 
1.79871×10-7  mi (UK, US, naut.)  nautical mile (UK, US) 
4.37445×10-4    pace (UK) 
4.37445×10-3    palm (UK) 
1.08026×10-20  pc  parsec 
6.62796×10-5  rd  perch (rod, pole) 
3.33333×10-19  Pm  petameter 
7.90354×10-2    pica 
3.33333×108  pm  picometer 
0.948425    point (US printer's) 
6.62796×10-5  rd  pole (rod, perch) 
3.33333×10-11    quadrant 
6.62796×10-5  rd  rod (perch, pole) 
5.46807×10-5    rope (UK) 
1.45815×10-3    span 
3.33333×10-16  Tm  terameter 
13.1234  thou, mil  thou (mil) 
3.33264×109  UX, X  X-unit 
3.64538×10-4  yd  yard 
3.33333×1020  ym  yoctometer 
3.33333×10-28  Ym  yottameter 
3.33333×1017  zm  zeptometer 
3.33333×10-25  Zm  zettameter 
Glossary
FREE Publications
CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

more publications