Units Currencies
Constants
Units Home
Unit Conversion
List Units
List Categories
Currencies
Convert Units
SI System
Base Units
Derived Units
Prefixes
Numbers
Constants
Base-N
Fractions
Time / Decimal
Resources
Bibliography
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

CNC Machining Design Guide

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

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

more free publications

Materials

Design

Processes

Units

Formulas

Math
 
span
Symbol:   
Category:  Length 
SI Equivalent:  0.2286 m
Dimension:  L 
System:  UK 
 
Notes
1 span (UK) = 9 inches
Convert     span  
1 span =
Length
  Symbol Unit Name
4.31991×109  a.u., a0, b  a.u. of length 
2.286×109  Å  angstrom 
785.869  arcmin  arcmin 
1.5281×10-12  AU, UA  astronomical unit 
2.286×1017  am  attometer 
27    barleycorn (UK) 
4.31991×109  a0, b  bohr (first Bohr radius) 
6.25×10-3    bolt (US cloth) 
108  line (UK)  button (UK) 
360  line (US)  button (US) 
1.23434×10-3    cable length (int.) 
1.23355×10-3    cable length (UK) 
1.04167×10-3    cable length (US) 
900  caliber, cin  caliber (centiinch) 
22.86  cm  centimeter 
7.5×10-3  ch  chain (engineer's) 
1.13636×10-2  ch  chain (Gunter's) 
7.5×10-3  ch  chain (Ramsden's) 
1.13636×10-2  ch  chain (surveyor's) 
0.5    cubit (UK) 
2.286×10-2  dam  decameter 
2.286  dm  decimeter 
8.11231×1013  re  electron classical radius 
0.2    ell 
54.2027    ems (pica) 
2.286×10-19  Em  exameter 
0.125  fath  fathom 
2.286×1014  fm  femtometer 
2.286×1014  F, f  fermi 
4.31991×109  a0, b, a.u.  first Bohr radius 
0.75  ft  foot 
685.8  fr  French 
1.13636×10-3  fur  furlong (UK) 
1.13636×10-3  fur  furlong (US) 
2.286×10-10  Gm  gigameter 
2.25  hd  hand (UK) 
2.286×10-3  hm  hectometer 
2.41636×10-26    hubble 
9  in  inch 
2.286×10-4  km  kilometer 
7.40842×10-21  kpc  kiloparsec 
4.73586×10-5    league (Canadian) 
4.11447×10-5  leag. (int. naut.)  league (int. naut.) 
4.73485×10-5  leag. (stat.)  league (statute, land) 
4.11184×10-5  leag. (UK, naut.)  league (UK, naut.) 
4.11184×10-5  leag. (US, naut.)  league (US, naut.) 
8.82555×10-15    light-day 
2.11813×10-13    light-hour 
1.27088×10-11    light-minute 
7.62528×10-10    light-second 
2.41636×10-17  ly  light-year 
108  line (UK)  line (UK) 
360  line (US)  line (US) 
0.75    link (engineer's) 
1.13636    link (Gunter's) 
0.75    link (Ramsden's) 
1.13636    link (surveyor's) 
2.286×10-7  Mm  megameter 
0.2286  m  meter 
9×106  µin  microinch 
2.286×105  µm  micron 
9000  mil, thou  mil (thou) 
3.0802×10-5  mile (geogr.)  mile (geographical) 
1.42045×10-4  mi (int.)  mile (international) 
1.23434×10-4  mi (naut., int.)  mile (nautical, international) 
1.23213×10-4  mi (naut., teleg.)  mile (nautical, telegraph) 
1.23355×10-4  mi (naut., UK, US)  mile (nautical, UK, US) 
1.42045×10-4  mi (stat.)  mile (statute, land) 
1.42045×10-4  mi (survey, US)  mile (survey, US) 
228.6  mm  millimeter 
2.286×108  mµ, nm  millimicron 
1    nail (UK) 
2.286×108  nm  nanometer 
1.23434×10-4  mi (int. naut.)  nautical mile (international) 
1.23355×10-4  mi (UK, US, naut.)  nautical mile (UK, US) 
0.3    pace (UK) 
3    palm (UK) 
7.40842×10-18  pc  parsec 
4.54545×10-2  rd  perch (rod, pole) 
2.286×10-16  Pm  petameter 
54.2025    pica 
2.286×1011  pm  picometer 
650.43    point (US printer's) 
4.54545×10-2  rd  pole (rod, perch) 
2.286×10-8    quadrant 
4.54545×10-2  rd  rod (perch, pole) 
3.75×10-2    rope (UK) 
2.286×10-13  Tm  terameter 
9000  thou, mil  thou (mil) 
2.28552×1012  UX, X  X-unit 
0.25  yd  yard 
2.286×1023  ym  yoctometer 
2.286×10-25  Ym  yottameter 
2.286×1020  zm  zeptometer 
2.286×10-22  Zm  zettameter 
Glossary
FREE Publications
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

CNC Machining Design Guide

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

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

more publications