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Length

Unit Name

Symbol

SI Equivalent

·	a.u. of length

a.u., a₀, b

5.29177x10^-11 m

angstrom

1x10^-10 m

arcmin

2.90888x10^-4 m

·	astronomical unit

AU, UA

1.49598x10¹¹ m

attometer

1x10^-18 m

·	barleycorn (UK)

8.46667x10^-3 m

·	bohr (first Bohr radius)

a₀, b

5.29177x10^-11 m

·	bolt (US cloth)

36.576 m

·	button (UK)

line (UK)

2.11667x10^-3 m

·	button (US)

line (US)

6.35x10^-4 m

·	cable length (int.)

185.2 m

·	cable length (UK)

185.318 m

·	cable length (US)

219.456 m

·	caliber (centiinch)

caliber, cin

2.54x10^-4 m

·	centimeter

1x10^-2 m

·	chain (engineer's)

30.48 m

·	chain (Gunter's)

20.1168 m

·	chain (Ramsden's)

30.48 m

·	chain (surveyor's)

20.1168 m

·	cubit (UK)

0.4572 m

decameter

dam

10 m

decimeter

0.1 m

·	electron classical radius

r_e

2.81794x10^-15 m

ell

1.143 m

·	ems (pica)

4.2175x10^-3 m

exameter

1x10¹⁸ m

fathom

fath

1.8288 m

·	femtometer

1x10^-15 m

fermi

F, f

1x10^-15 m

·	first Bohr radius

a₀, b, a.u.

5.29177x10^-11 m

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