1 m = 39.37 in

1 in = 2.54cm

1 mi = 5280 ft = 1.609 km

i angstrom (Å) = 10^-10 m

1 kg = 2.205 lb

1 lb = 16oz = 453.6g

1 ton (short) = 2000lb

1 metric ton = 1000 kg = 1.102 tons

1 g = 6.0221 x 10²³ amu

1 J = 1 N x m

1 cal = 4,184 J

1 L x atm = 101.33 J

1 megaelectron volt (MeV) = 1.602 x 10^-13 J

1 u = 931.5 MeV

1 Btu = 1055 J

1 Pa = 1 N/m2

1 bar =  105 Pa

1 atm = 1.01325 bar = 760 torr =  760mm Hg              

1 L = 1000cm³ = 1.057 qt

1 gal = 4 qt = 8 pt = 128 oz = 3.785 L

Charge : 1F = 96,485 C

Current : 1 ampere (A) = 1 C/s

Force : 1 N = 1kg x m/s²

^{Time : 1 h = 60min = 3600 s}

^{Voltage : 1 volt = 1 J/C}