1728 Cu. In. = 1 Cu. Ft. = 7.48 Gal

1" = 2.54 Cm

3412 Btu = 1 Kwh = 1.34 Hp Hour

491 Btu/Ft.²= 1 Watt Hour/In.² = Heat Density

1 Btu/Lb.°F = 1 Gram-Cal./Gram °C = Specific Heat

231 Cu. In. = 1 Gal

1 BTU = 252 Calories = .293 Watt-Hours

1 BTU/Lb. = 1.8 Calories/Gram

1 HP = 745.2 Watts

1 Gal. Water = 8.3 Lbs.

1 Gal. = 231 Cu. In. = 3.785 Liters = 1.227 Cu. Ft

1 Cu. Ft. = 1728 Cu. In. = .03704 Cu. Yd. = 7.481 Gal.

3 Phase Amps = Total Watts/Volts x 1.73

Wattage varies directly as ratio of voltages squared:  W² = W¹ X (E²/E¹)²
ENGINEERING CONSTANTS
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