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

  Select parameter and units:   From:   To:
Area, Permeability
Mass, Force, Weight
 © 2015 LMNO Engineering,  From (degree):  To (degree):
 Research, and Software, Ltd.
Velocity, Hydraulic Conductivity
Volumetric Flow Rate
Mass Density, Weight Density
Mass Flow, Force Flow
Energy, Torque, Moment
Dynamic (absolute) Viscosity
Kinematic Viscosity

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 separately.
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.


© 2000-2015 LMNO Engineering, Research, and 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
LMNO@LMNOeng.com    http://www.LMNOeng.com

October 9, 2015: Made text fields show 8 significant figures rather than 16. Calculation still uses double precision internally.


LMNO Engineering home page (more calculations) 

Gas flow conversions

Trouble printing?