Unit Conversion Calculator
Unit conversions for: Temperature, Angle, Length, Area,
Volume, Mass, Force, Pressure, Time, Velocity, Acceleration, Volumetric Flowrate, Mass
Density, Weight Density, Mass Flow, Energy, Power, Viscosity
Unit Conversions calculation is mobile-device-friendly as of March 11, 2015
LMNO Engineering wrote the unit conversion computer program in the PHP computer language using
double precision so that the
maximum number of significant digits in the unit conversions could be used. We used the
maximum amount of significant figures for each unit. For instance, Munson et al.
(1998) provides a unit conversion of 1 bushel(US)=0.03523907016688 meter3.
We used all of the digits in our program.
The acceleration of gravity, 9.80665 m/s2, is used to convert between mass and
force such as kilograms and Newtons.
Pound(mass) and pound(force) have identical numerical values. We list both units
because many people are used to using one or the other and like to see them listed
The BTU and calorie units are thermochemical values.
A year is a calendar year (365 days).
The calculation does not check for impossible input such as temperature below absolute zero.
Abbreviations (selected) used in unit conversions calculator:
bbl=barrel, BTU=British Thermal Unit, cm=centimeter, ft=foot, km=kilometer, kW=kiloWatt,
lb=pound, lb(f)=pound(force), lb(m)=pound(mass), m=meter, Mcf=thousand cubic feet,
mg=milligram, MGD=million gallons per day, mm=millimeter, MPa=Mega Pascal, min=minute,
N=newton, s=sec=second, UK=United Kingdom (used for gallons), US=United States (used for
gallons and some other units), yr=year
Bear, J. 1979. Hydraulics of Groundwater. McGraw-Hill Pub Co.
Munson, B.R., D. F. Young, and T. H. Okiishi. 1998. Fundamentals of Fluid
Mechanics. John Wiley and Sons, Inc. 3ed. (This is the best reference
for fluid mechanics unit conversions. It indicates which unit conversions are exact
by definition and which are approximate - there are some units in existence that cannot be
exactly converted from one unit to another. For the non-exact conversions, it
provides on the order of 10 significant digits for each unit.)
Perry, R. H. and D. W. Green. 1984. Perry's Chemical Engineers' Handbook
McGraw-Hill, Inc. 6ed.
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Software, Ltd. All rights reserved.
Please contact us for consulting or other questions.
LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd. Athens, Ohio 45701 USA Phone and
fax: (740) 592-1890
October 9, 2015: Made text fields show 8 significant figures rather than 16. Calculation still uses double precision internally.
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