我想知d量度準則...

Length
1 inch (in) = 2.54 centimeters (cm)
1 foot (ft) = 0.3048 meter (m)
1 mile (mi) = 5280 ft = 1.609 kilometers (km)
1 m = 3.281 ft
1 km = 0.6214 mi
1 angstrom (A) = 10^-10 m
1 astronomical unit (AU) = 1.496 x 10^11 m
1 parsec (pc) = 3.09 x 10^16 m

Mass
1 slug = 14.59 kilograms (kg)
1 kg = 1000 grams = 6.852 x 10^-2 slug = 2.205 pound (lb)
1 atomic mass unit (amu) = 1.6605 x 10^-27 kg

Time
1 day = 24h = 1.44 x10^3 min = 8.64 x 10^4 s
1 year (yr) = 365.24 days = 3.156 x 10^7 s
1 h = 60 min = 3600 s

Speed
1 mi/h = 1.609 km/h = 1.467 ft/s = 0.4470 m/s
1 km/h = 0.6214 mi/h = 0.2778 m/s = 0.9113 ft/s

Volume
1 litter (L) = 10^-3 m^3 = 1000 cm^3 = 0.3531 ft^3
1 ft^3 = 0.02832 m^3 = 7.481 U.S. gallons (gal)
1 U.S. gal = 3.785 x 10^-3 m^3 = 0.1337 ft^3

Force
1 pound (lb) = 4.448 newtons (N)
1 N = 10^5 dynes (dyn) = 0.2248 lb

Work and Energy
1 joule (J) = 0.7376 ft x lb = 10^7 ergs
1 kilogram-caloric (Kcal) = 4186 J
1 Btu (60 degree F) = 1055 J
1 kilowatt-hour (kWh) = 3.600 x 10^6 J
1 electron volt (eV) = 1.602 x 10^-19 J

Angle
1 radian (rad) = 57.30 degree
1 degree = 0.01745 rad

Pressure
1 pascal (Pa) = 1 N/m^2 = 1.450 x 10^-4 lb/in^2
1 lb/in^2 = 6.895 x 10^3 Pa
1 atmosphere (atm) = 1.013 x 10^5 Pa = 1.013 bar = 14.7 lb/in^2 = 760 torr

Power
1 horsepower (hp) = 550 ft x lb/s = 745.7 W
1 watt (W) = 0.7376 ft x lb/s