UNIT CONVERSION FACTORS
LENGTH  
   
inches to centimeters: 1 in = 2.54 cm
  1 cm = 0.3937 in
   
meters to feet: 1 m = 39.37 in = 3.281 ft
  1 ft = 12 in = 0.305 m
   
kilometers to miles: 1 km = 0.621 mi
  1 mi = 1.61 km
   
MASS  
   
slugs to kilograms: 1 slug = 14.59 kg
  1 kg = 0.0685 slug
   
VELOCITY  
   
meters per second to miles per hour: 1 m/s = 2.237 mph
  1 mph = 0.447 m/s
   
miles per hour to feet per second: 1 mph = 1.467 ft/s
  1 ft/s = 0.682 mph
   
FORCE  
   
Newtons to pounds: 1 N = 0.2248 lb
  1 lb = 4.448 N
   
PRESSURE  
   
Pascals to pounds per square inch: 1 Pa = 1 N/m2 = 0.000145 lb/in2 (psi)
  1 lb/in2 = 689.655 N/m2 = 689.655 Pa
   
VOLUME  
   
cubic meters to cubic feet: 1 m3 = 35.32 ft3
  1 ft3 = 0.0283 m3
   
liters to cubic feet: 1 L = 0.000999 m3 = 0.0353 ft3
  1 ft3 = 0.0283 m3 = 28.33 L
   
U.S. gallons to liters: 1 U.S. gal = 3.786 L
  1 L = 0.264 U.S. gal
   
WORK  
   
foot pounds to Joules: 1 ft lb = 1.3558 N m = 1.3558 J
  1 J = 1 N m = 0.7376 ft lb
   
POWER  
   
Watts to horsepower: 1 W = 0.00134 hp
  1 hp = 745.7 W
   
foot pounds/second to horsepower: 1 ft lb/s = 0.00182 hp
  1 hp = 550 ft lb/s
   
Watts to foot pounds/second: 1 W = 0.7373 ft lb/s
  1 ft lb/s = 1.3564 W