
Throughout this document, scientific notation is written as you would type it in Creo Simulate. For example, 2.07 x 1011 is written as 2.07e11.

Quantity  Common  MLT  FLT 
length  L  L  L 
time  T  T  T 
mass  M  M  FT2/L 
force  F  ML/T2  F 
temperature  D  D  D 
area  L2  L2  L2 
volume  L3  L3  L3 
velocity  L/T  L/T  L/T 
acceleration  L/T2  L/T2  L/T2 
gravitational acceleration  L/T2  L/T2  L/T2 
angle, rotation  R  R  R 
rotational velocity  R/T  R/T  R/T 
rotational acceleration  R/T2  R/T2  R/T2 
density  M/L3  M/L3  FT2/L4 
moment, torque  FL  ML2/T2  FL 
distributed force along a curve  F/L  M/T2  F/L 
distributed moment along a curve  F  ML/T2  F 
distributed force over a surface, pressure, stress, Young's modulus  F/L2  M/LT2  F/L2 
distributed moment over a surface  F/L  M/T2  F/L 
translational stiffness  F/L  M/T2  F/L 
rotational stiffness  FL/R  ML2/T2R  FL/R 
coefficient of thermal expansion  /D  /D  /D 
moment of inertia of beam crosssectional area  L4  L4  L4 
mass moment of inertia  ML2  ML2  FLT2 
energy, work, heat (E)  FL  ML2/T2  FL 
power, heat transfer rate (P)  E/T  ML2/T3  FL/T 
temperature gradient  D/L  D/L  D/L 
heat flux  P/L2  M/T3  F/TL 
thermal conductivity  P/LD  ML/T3D  F/TD 
convection coefficient  P/L2D  M/T3D  F/LTD 
specific heat (Cp)  E/MD  L2/T2D  FL/MD 
Basic Units  Some Derived Units 
M: kilogram (kg)  F: kgm/sec2 = Newton (N) 
L: meter (m)  E: Nm = Joule (J) 
T: second (sec)  P: J/sec = Watt (W) 
D: degree Celsius (C) 
Basic Units  Some Derived Units 
F: Newton (N)  M: (Nsec2/mm) (kgm/Nsec2) (1000mm/m) = 1000 kg = tonne(t) 
L: millimeter (mm)  E: (Nmm) (J/Nm) (m/1000mm) = J/1000 = mJ 
T: second (sec)  P: (mJ/sec) (J/1000mJ) (Wsec/J) = W/1000 = mW 
D: degree Celsius (C) 
Basic Units  Some Derived Units 
M: kilogram (kg)  F: kgmm/sec2= mN 
L: millimeter (mm)  E: mNmm = J 
T: second (sec)  P: J/sec = W 
D: degree Celsius (C) 
Basic Units  Some Derived Units 
F: poundforce (lbf)  M: lbfsec2/ft = slug 
L: foot (ft)  E: ftlbf 
T: second (sec)  P: ftlbf/sec 
D: degree Fahrenheit (F) 
Basic Units  Some Derived Units 
F: poundforce (lbf)  M: lbfsec2/in 
L: inch (in)  E: lbfin 
T: second (sec)  P: lbfin/sec 
D: degree Fahrenheit (F) 
Basic Units  Some Derived Units 
M: gram (g)  F: gcm/sec2 = 105 N = dyne 
L: centimeter (cm)  E: gcm2/sec2 = 107 J = erg 
T: second (sec)  P: gcm2/sec3 = 107 W 
D: degree Celsius (C) 
Basic Units  Some Derived Units 
M: poundsmass (lbm)  F: inlbm/sec2 
L: inch (in)  E: in2lbm/sec2 
T: second (sec)  P: in2lbm/sec3 
D: degree Fahrenheit (F) 
Units  Metric (MKS)  Metric (mmNS)  English (FPS)  English (IPS)  
length  m  mm  ft  in  
time  sec  sec  sec  sec  
mass  kg  tonne  slug  lbfsec2/in  
force  N  N  lbf  lbf  
temperature  C  C  F  F  
area  m2  mm2  ft2  in2  
volume  m3  mm3  ft3 (cuft)  in3 (cuin)  
velocity  m/sec  mm/sec  ft/sec  in/sec  
acceleration  m/sec2  mm/sec2  ft/sec2  in/sec2  
angle, rotation  rad and degree  rad and degree  rad and degree  rad and degree  
gravitational acceleration  m/sec2  mm/sec2  ft/sec2  in/sec2  
rotational velocity  rad/sec  rad/sec  rad/sec  rad/sec  
rotational acceleration  rad/sec2  rad/sec2  rad/sec2  rad/sec2  
density  kg/m3  tonne/mm3  slug/ft3  lbfsec2/in4  
moment, torque  Nm  Nmm  ftlbf  inlbf  
distributed force along a curve  N/m  N/mm  lbf/ft  lbf/in  
distributed moment along a curve  N  N  lbf  lbf  
distributed force over a surface, pressure, stress, Young's modulus  N/m2 (Pa)  N/mm2 (MPa)  lbf/ft2  lbf/in2 (psi)  
translational stiffness  N/m  N/mm  lbf/ft  lbf/in  
rotational stiffness  Nm/rad  Nmm/rad  lbfft/rad  lbfin/rad  
coefficient of thermal expansion  /C  /C  /F  /F  
moment of inertia of beam crosssectional area  m4  mm4  ft4  in4  
mass moment of inertia  kgm2  tonnemm2  slugft2  lbfinsec2  
energy, work, heat (E)  J  mJ  ftlbf  inlbf  
power, heat transfer rate (P)  W  mW  ftlbf/sec  inlbf/sec  
temperature gradient  C/m  C/mm  F/ft  F/in  
heat flux  W/m2  mW/mm2  lbf/ftsec  lbf/insec  
thermal conductivity  W/mC  mW/mmC  lbf/secF  lbf/secF  
convection film coefficient  W/m2C  mW/mm2C  lbf/ftsecF  lbf/insecF  
specific heat (Cp)  J/kgC  mJ/tonneC  ftlbf/slugF  in2/sec2F  

Units  Metric (MKS)  Metric (mmNS)  English (FPS)  English (IPS) 
g (gravitational acceleration)  9.81 m/sec2  9810 mm/sec2  32.2 ft/sec2  386 in/sec2 
density (steel)  7830.0 kg/m3  7.83e9 tonne/mm3  15.2 slug/ft3  7.33e4 lbsec2/in4 
Young's modulus (steel)  2.07e11 N/m2  2.07e5 N/mm2  4.32e9 lb/ft2  3.0e7 lb/in2 
coefficient of thermal expansion (steel)  12e6/C  12e6/C  6.5e6/F  6.5e6/F 
thermal conductivity (steel)  43.37 W/mC  43.37 mW/mmC  5.4 lbf/secF(25 Btu/hrftF)  5.41bf/secF(2.083 Btu/hrinF) 
Length Conversion Factors  
m  mm  ft  in  
1 m =  1  1000  3.281  39.37 
1 mm =  1.0e3  1  3.281e3  3.937e2 
1 ft =  0.3048  304.8  1  12 
1 in =  2.54e2  25.4  8.333e2  1 
Mass Conversion Factors  
kg  tonne (Nsec2/mm)  slug (lbsec2/ft)  lbsec2/in  
1 kg =  1  1.0e3  6.852e2  5.71e3 
1 tonne =  1000  1  68.52  5.71 
1 slug =  14.59  14.59e3  1  8.333e2 
1 lbsec2/in =  175.1  0.1751  12  1 
Moments of Inertia  
kg m2  tonne mm2  slug ft2  lbfsec2in  
1 kg m2=  1  1000  .738  8.85 
1 tonne mm2=  1e3  1  7.375e4  8.85e3 
1 slug ft 2=  1.356  1.356e3  1  12 
1 lbfsec2in =  0.113  113  1/12  1 
Force Conversion Factors  
N  Kgforce  lb  
1 N =  1  0.101972  0.2248 
1 lb =  4.448  0.453594  1 
Moment Conversion Factors  
Nm  Nmm  lbft  lbin  
1 Nm =  1  1000  0.7376  8.851 
1 Nmm =  1.0e3  1  7.376e4  8.851e3 
1 lbft =  1.356  1356  1  12 
1 lbin =  0.113  113  8.33e2  1 
Density Conversion Factors  
kg/m3  tonne/mm3  slug/ft3  lbsec2/in4  
1 kg/m3 =  1  1e12  1.94e3  9.36e8 
1 tonne/mm3 =  1e12  1  1.94e9  9.36e4 
1 slug/ft3 =  515  5.15e10  1  4.82e5 
1 lbsec2/in4 =  1.07e7  1.07e5  20700  1 
Stress Conversion Factors  
N/m2  N/mm2  lb/ft2  lb/in2  
1 N/m2 =  1  1e6  2.09e2  1.45e4 
1 N/mm2 =  1e6  1  20900  145 
1 lb/ft2 =  47.9  47.9e5  1  6.94e3 
1 lb/in2 =  6890  6.89e3  144  1 
Translational Stiffness Conversion Factors  
N/m  N/mm  lb/ft  lb/in  
1 N/m =  1  1.0e3  6.8525e2  5.7104e3 
1 N/mm =  1000  1  68.525  5.710 
1 lb/ft =  14.593  1.4593e2  1  8.33e2 
1 lb/in =  175.118  1.7512e5  12  1 
Rotational Stiffness Conversion Factors  
Nm/rad  Nmm/rad  lbft/rad  lbin/rad  
1 Nm/rad =  1  1000  0.7376  8.851 
1 Nmm/rad =  1.0e3  1  7.376e4  8.851e3 
1 lbft/rad =  1.356  1356  1  12 
1 lbin/rad =  0.113  113  8.33e2  1 
Thermal Conductivity Conversion Factors  
W/mC  mW/mmC  Btu/hrftF  Btu/hrinF  lbf/secF  
1 W/mC =  1  1  0.5777  4.817e2  0.1249 
1 mW/mmC =  1  1  0.5777  4.817e2  0.1249 
1 Btu/hrftF =  1.731  1.731  1  8.333e2  0.2162 
1 Btu/hrinF =  20.76  20.76  12  1  2.594 
1 lbf/secF =  8.007  8.007  4.626  0.3854  1 