WORLD FOR CIVIL

More Useful Measurement Units

The E indicates an exponent, as in scientific notation, followed by a positive or negative number, representing the power of 10 by which the given conversion factor is to be multiplied before use.

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Detailed Units

Typical Conversion Table ^*

To convert from	To	Multiply by *
Square foot	Square meter	9.290304	E – 02
Foot per second squared	Meter per second squared	3.048	E – 01
Cubic foot	Cubic meter	2.831685	E – 02
Pound per cubic inch	Kilogram per cubic meter	2.767990	E + 04
Gallon per minute	Liter per second	6.309	E – 02
Pound per square inch	Kilopascal	6.894757
Pound fource	Newton	4.448222
Kip per square foot	Pascal	4.788026	E + 04
Acre foot per day	Cubic meter per second	1.427641	E – 02
Acre	Square meter	4.046873	E + 03
Cubic foot per second	Cubic meter per second	2.831685	E – 02

Measurement Units

Civil engineers throughout the world accept both the United States Customary System (USCS) and the System International (SI) units of measure for both applied and theoretical calculations. However, the SI units are much more widely used than those of the USCS. Hence, both the USCS and the SI units are presented for essentially every formula in this website.

To permit even wider use of this text, this website contains
the conversion factors needed to switch from one system to the other.

Commonly Used USCS and SI Units ^*

USCS unit	SI unit	SI symbol	Conversion factor ( multiply USCS unit by this factor to obtain SI unit)
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	Nu	4.448
Foot pound torque	Newton meter	N-m	1.356
Kip foot	Kilonewton meter	LN-m	1.355
Gallon per minute	Liter per second	L/s	0.06309
Kip per square inch	Megapascal	MPa	6.89

^* These are the most common units which everyone should know.This website deals with a detailed discussion in next pages.