SI (metric) prefixes Units, Conversions The International System of Units (abbreviated SI from French: Système international d'unités) is the modern form of the metric system and is generally a system of units of measurement devised around seven base units and the convenience of the number ten. The older metric system included several groups of units. The SI was established in 1960, based on the metre-kilogram-second system, rather than the centimetre-gram-second system, which, in turn, had a few variants. The SI is declared as an evolving system, thus prefixes and units are created and unit definitions are modified through international agreement as the technology of measurement progresses, and as the precision of measurements improves. If there is one thing you need to learn, it's metric prefixes. You will use them in a variety of ways the rest of your life, no matter what you do. At least the most common ones such as k,M,G and c,m,µ. ```SI (metric) prefixes: da (deca) = x10 (rarely used) h (hecto) = x100 (rarely used) k (kilo) = x1000 = e3 M (Mega) = x1000000 = e6 G (Giga) = x1000000000 = e9 T (Tera) = x1000000000000 = e12 P (Peta) = e15 E (Exa) = e18 Z (Zetta) = e21 Y (Yotta) = e24 d (deci) = /10 = e-1 (rarely used) c (cent) = /100 = e-2 (rarely used except for cm) m (milli) = /1000 = e-3 µ (micro) = /1000000 = e-6 n (nano) = /1000000000 = e-9 p (pico) = /1000000000000 = e-12 f (femto) = e-15 a (atto) = e-18 z (zepto) = e-21 y (yocto) = e-24 ``` PS, you sometimes see kbyte for 1024 bytes or Mbyte for 1024*1024 bytes or similar. That is not correct usage. kbyte is 1000 bytes and Mbye is 1000000 bytes. If you want to use a power of two factor, you need to use a different prefix. Correct usage: 1 Kibyte = 1024 bytes 1 Mibyte = 1024² bytes = 1024 Kibytes = 1048576 bytes 1 Gibyte = 1024³ bytes = 1024 Mibytes = 1048576 Kibyte      = 1073741824 bytes ```http://en.wikipedia.org/wiki/Metric_prefixes Volume units 100000 L = 100 m³ 10000 L = 10 m³ 1000 L = 1 m³ = 1000 dm³ 100 L = 0.1 m³ = 100 dm³ 10 L = 10000 cm³ = 0.01 m³ = 10 dm³ 1 L = 1000 mL = 1000 cm³ = 0.001 m³ = 1 dm³ 0.1 L = 100 mL = 100 cm³ = 0.0001 m³ = 0.1 dm³ 0.01 L = 10 mL = 10 cm³ = 0.00001 m³ = 0.01 dm³ 0.001 L = 1 mL = 1 cm³ = 0.000001 m³ = 0.001 dm³ 1 mL = 1000µL = 1000 mm³ = 1 cm³ = 0.000001 m³ 0.1 mL = 100µL = 100 mm³ = 0.1 cm³ 0.01 mL = 10µL = 10 mm³ = 0.01 cm³ 0.001 mL = 1µL = 1 mm³ = 0.001 cm³ 1 µL = 1000 nL = 1 mm³ = 100000 µm³ 0.1 µL = 100 nL = 0.1 mm³ = 10000 µm³ 0.01 µL = 10 nL = 0.01 mm³ = 1000 µm³ 0.001 µL = 1 nL = 0.001 mm³ = 100 µm³ ``` Home Area, Volume Atomic Mass Black Body Radiation Boolean Algebra Calculus Capacitor Center of Mass Carnot Cycle Charge Chemistry   Elements   Reactions Circuits Complex numbers Constants Curves, lines deciBell Density Electronics Elements Flow in fluids Fourier's Law Gases Gravitation Greek Alphabet Horizon Distance Interest Magnetics Math   Trig Math, complex Maxwell's Eq's Motion Newton's Laws Octal/Hex Codes Orbital Mechanics Particles Parts, Analog IC   Digital IC   Discrete Pendulum Planets Pressure Prime Numbers Questions Radiation Refraction Relativistic Motion Resistance, Resistivity Rotation Series SI (metric) prefixes Skin Effect Specific Heat Springs Stellar magnitude Thermal Thermal Conductivity Thermal Expansion Thermodynamics Trigonometry Units, Conversions Vectors Volume, Area Water Wave Motion Wire, Cu   Al   metric Young's Modulus