Length:
1 inch. = 25.4 mm.
1 ft. = 304.8 mm.
1 m. = 1.094 yard

Area:
1 square inch = 645.2 square mm.
1 square ft. = 0.0929 square m.
1 square m. = 10.764 square ft.
1 square m. = 1.196 square yard

Volume:
1 cubic inch = 16387 cubic mm.
1 cubic ft. = 0.0283 cubic m.
1 cubic m. = 35.315 cubic m.
1 liter = 0.0353 cubic ft.
1 US gallon = 3.785 liter

Density:
1 g / liter = 1 kg/ cubic m. = 0.001 g/ cubic cm.
1 g/ cubic cm. = 0.036127 lb / cubic inch

Pressure:
1 Pa = 1 N/ square m.
1 bar = 1.01972 kg / square cm. = 14.5038 PSI
1 atm = 10.3416 m. ( water ) = 14.6959 PSI
1 m. (water) = 1.42105 PSI

Water Analysis Unit:
1 Parts per million (ppm) = 1 Milligram per liter ( mg/l )
1 Grain per US gallon = 17.1 Parts per million (ppm)
1 Million-equivalent per liter = 50 Parts per milliom (ppm) as CaCo3

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