USCS - United States Customary System Units

An overview of the United States Customary System Units - Imperial Units. Conversion tool between USCS and SI units with commonly used measurements.

USCS - United States Customary System Units are the measuring units used in the U.S. based on:

USCS units are also called the Imperial units. Imperial or USCS units are gradually being replaced by SI units.

Commonly used USCS and SI-units

Below is a table of common USCS units and their SI unit equivalents with conversion factors.

USCS Unit	SI Unit	SI Symbol	Conversion Factor
Square foot	Square meter	m²	0.0929
Cubic foot	Cubic meter	m³	0.2831
Pound per square inch	Kilopascal	kPa	6.894
Pound force	Newton	N	4.448
Foot pound torque	Newton meter	N·m	1.356
Kip foot	Kilonewton meter	kN·m	1.356
Gallon per minute	Liter per second	L/s	0.06309
Kip per square inch	Megapascal	MPa	6.89