CONVERSION FACTORS :::

Units of	Multiply units in left column by proper factor below
Length	in.	ft.	yd.	mile	mm.	cm.	m.	km.
1 inch	1	0.0833	0.0278	-	25.40	2.540	0.0254	-
1 foot	12	1	0.3333	-	304.8	30.48	0.3048	-
1 yard	36	3	1	-	914.4	91.44	0.9144	-
1 mile	-	5,280	1,760	1	-	-	1,609.3	1.609
1 millimeter	0.0394	0.0033	-	-	1	0.1000	0.0010	-
1 centimeter	0.3937	0.0328	0.0109	-	10	1	0.01	-
1 meter	39.37	3.281	1.904	-	1000	100	1	0.001
1 kilometer	-	3281	1094	0.6214	-	-	1000	1
(1 micron = 0.001 millimeter)

Units of	Multiply units in the left column by proper factor below
Area	sq. in.	sq. ft.	acre	sq. mile	sq. cm.	sq. m.	hectare
1 sq. inch	1	0.0069	-	-	6.452	-	-
1 sq. foot	144	1	-	-	929.0	0.0929	-
1 acre	-	43,560	1	0.0016	-	4,407	0.4047
1 sq. mile	-	-	640	1	-	-	259.0
1 sq. centimeter	0.1550	-	-	-	1	0.0001	-
1 sq. meter	1550	10.76	-	-	10,000	1	-
1 hectare	-	-	2,471	-	-	10,000	1

Units of	Multiply units in left column by proper factor below
Volume	cu. in.	cu. ft.	cu. yd.	cu. cm	cu. meter	liter	U.S. gal.	Imp. gal.
1 inch	1	-	-	16.387	-	0.0164	-	-
1 foot	1,728	1	0.0370	28.317	0.0283	28.32	7.481	6.229
1 yard	46,656	27	1	-	0.7646	764.5	202.0	168.2
1 mile	0.0610	-	-	1	-	0.0010	-	-
1 millimeter	61,023	35.31	1.308	1,000,000	1	999.97	264.2	220.0
1 centimeter	61.025	0.0353	-	1,000.028	0.0010	1	0.2642	0.2200
1 meter	231	0.1337	-	3,785.4	-	3.785	1	0.8327
1 kilometer	277.4	0.1605	-	4,546.1	-	4.546	1.201	1