Weight, Size, Concentration and Dimension in the Nanoscale

Weights & Dimensions

Some Helpful Perspective on Weight, Size, Concentration and Dimension in the nanoscale

Conversion Chart

milli = one thousandth = 10-3 = 0.001
micro = one millionth = 10-6 = 0.000001
nano = one billionth = 10-9 = 0.000000001
pico = one trillionth = 10-12  

 

Weight

Kilogram 1kg = 1000g  
Gram 1g = 0.001kg  
Milligram 1mg = 0.001g = 1000µg
Microgram 1µg = 0.001mg = 0.000001g
Nanogram 1ng = 0.001µg = 0.000001mg

 

Size:

Meter 1 m = 1,000mm      
Millimeter 1 mm = 1,000µm   = 1,000,000nm = 10-3 m
Micron 1 µm = 1 millionth of a meter = 0.001mm = 1000nm = 10-6 m
Nanometer 1 nm = 1 billionth of a meter = 0.001µm = 0.000001mm = 10-9 m
Angstrom 1 Å = 1 Ångstrom = 0.1nm   = 10-10 m
Picometer 1 pm = 1 trillionth of a meter = 0.001nm   = 10-12 m

 

Concentration:

By Volume 1ng/L = 1ppt ng/L = PPT = 0.0000000001%  
  1µg/L = 1ppb µ/L = PPB = 0.0000001%  
  1mg/L = 1ppm mg/L = PPM = 0.0001% = 1µg/mL
  1mg/mL = 1,000ppm mg/mL = g/L = 0.1%  
  1g/mL = 1,000,000ppm     = 100%  
  10g/L = 10,000ppm     = 1%  
  100g/L = 100,000ppm     = 10%  

 

Analogies: PPM : 1 inch in 16 miles or 1 minute in two years
  PPB : 1 second in nearly 32 years
  PPT : 1 ounce in 7.5 billion gallons of water
    1 ppt  = 0.001 ppb = 0.000001 ppm

 

By Weight 100 µg/mg = 100mg/g   = 10%  
  10 mg/g = 10g/kg   = 1%  
  1 g/kg  = 1/1000th = 1 µg/mg =1mg/g = 0.1%
  1 mg/kg = 1ppm = 1 µg/g   = 0.0001%
  1 µg/kg = 1ppb     = 0.0000001%
  1 ng/kg = 1ppt     = 0.0000000001%

 

Water Weight: Liter L = 1kg = 100% of a liter
  Milliliter mL = 1gram = 0.1% of a liter
  Microliter µl = 1mg = 0.0001% of a liter (1 millionth of a liter)