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

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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.

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