femto

• unit prefix

  • new in 1.67

  • used before many unit names to multiply by 10^-15. For example, a femtometer is 0.000000000000001 meter, or 1/1000th of a picometer.

  • Currently the following unit names beginning with this prefix may be used: femtoamp, femtoampere, femtoamperes, femtoamps, femtocoulomb, femtocoulombs, femtofarad, femtofarads, femtogram, femtograms, femtohenries, femtohenry, femtohertz, femtohz, femtojoule, femtojoules, femtoliter, femtoliters, femtolitre, femtolitres, femtometer, femtometers, femtometre, femtometres, femtonewton, femtonewtons, femtoohm, femtoohms, femtopascal, femtopascals, femtosec, femtosecond, femtoseconds, femtosecs, femtosiemens, femtotesla, femtoteslas, femtovolt, femtovolts, femtowatt, femtowatts, femtoweber, femtowebers, femtoω

  • The full list of metric prefixes includes:

    • Prefix	Multiple
      deci	0.1
      centi	0.01
      milli	0.001
      micro	10 ^ -6
      nano	10 ^ -9
      pico	10 ^ -12
      femto	10 ^ -15
      atto	10 ^ -18
      zepto	10 ^ -21
      yocto	10 ^ -24
      deca, deka	10
      hecto	100
      kilo	1000
      mega	10 ^ 6
      giga	10 ^ 9
      tera	10 ^ 12
      peta	10 ^ 15
      exa	10 ^ 18
      zetta	10 ^ 21
      yotta	10 ^ 24