Converstions and Constants

• Distance

  1 statute mile = 5280 feet

  1 statute mile = 1609 meter
• Distance

  1 nautical mile = 6080 feet
• Distance

  1 league = 3 nautical mile
• Distance

  1 yard = 3 feet
• Distance

  1 meter = 3.281 feet
• Distance

  1 foot = 12 inches

  1 foot = 3 hands
• Distance

  1 inch = 25.4 mm = 2.54 cm = 0.0254 m
• Distance

  1 rod = 5.5 yards
• Distance

  1 furlong = 220 yards = 660 feet
• Distance

  1 cable length = 608 feet
• Distance

  1 fathom = 6 feet
• Distance

  1 chain = 66 feet
• Distance

  1 span = 9 inches
• Distance

  1 light-year = 9.46 x 10^15 meters
• Distance

  1 rope = 20 feet
• Distance

  1 palm = 3 inches
• Speed & Acceleration

  1 meter per second = 3.6 kilometer per hour
• Speed & Acceleration

  1 knot = 1 nautical mile per hour
• Speed & Acceleration

  9.81 meter second squared = 32.2 feet per second squared
• Angles

  1 rev = 2π rad

  1 rev = 360 degrees

  1 rev = 400 grad

  1 rev = 400 gon

  1 rev = 6400 mills
• Temperature

  Farenheit = 1.8 (°C) + 32

  Rankine = °F + 460

  Kelvin = °C + 273
• Mass

  1 tonne = 1 metric ton = 1000 kgm
• Mass

  1 short ton = 2000 lbm = 907 kgm
• Mass

  1 long ton = 2240 lbm = 1016 kgm
• Mass

  1 kgm = 2.2046 lbm
• Mass

  1 lbm = 16 ounce = 7000 grains
• Mass

  1 slug = 32.2 lbm
• Mass

  1 Quintal = 100 kgm
• Density

  1 kg/liter = 62.4 lbm per cubic feet = 1000 kgm per cubic meter
• Density

  1 part per million (ppm) = 1 milligram per liters (mg/L) = 1 milligram per kilogram (mg/kg)
• Power

  1 HP = 0.746 Kilowatt

  1 HP = 42.2 BTU/min

  1 HP = 2545 BTU/hr

  1 HP = 550 lb - ft / sec

  1 HP = 33000 lb - ft / min
• Power

  1 TOR = 3.517 Kilowatt = 12000 BTU/hr
• Energy

  1 BTU = 778 ft - lb = 252 calorie = 1055 Joule
• Energy

  1 kilocalories = 4.187 kJ
• Energy

  1 Joule = 10^7 erg = 1 N-m
• Energy

  1 CHU = 1.8 BTU
• Energy

  1 erg = 1 dyne-cm = 10^-7 Joule
• Energy

  1 eV = 1.602 x10^-19 Joule
• Energy

  1 quad = 10^15 BTU
• Energy

  1 therm = 100,000 BTU