##### Summary:- Ratios of parts per million or ppm in Standard, Imperial and Metric units
 ppm = parts per million
 Unit Conversion Tool - download here for your server, PC or laptop to use anwwhere, anytime, off line.
 After determining the correct volume of water to be treated, use this formula to calculate the correct amount of material to use:- Amount of material needed = Vol. x Conv. factor x ppm desired x (100 / % active ingredient) Vol. = volume of water to be treated. Can be any volumetric units of measurement - cubic feet, litres, gallons, acre-feet. Conv. factor = the weight of material that must be added to one unit volume of water to give one part per million (ppm). See below for conversion factors. ppm desired = the treatment rate desired in parts per million (ppm) % active ingredient = the percent ingredient of the material to be used. Most materials used in treating fish diseases or aquatic weeds are 100% active or are considered to be 100% active for treatment purposes.

#### Weight of chemical that must be added to one unit volume of water to give one part per million (ppm)

 2.72 pounds per acre-foot = 1 ppm 1,233 grams per acre-foot = 1 ppm 1.233 kilograms per acre-foot = 1 ppm 0.0283 grams per cubic foot = 1 ppm 0.0000624 pounds per cubic foot = 1 ppm 0.0038 grams per US gallon = 1 ppm 0.058419 grains per US gallon = 1 ppm 0.07016 grains per Imperial gallon = 1 ppm 1 milligram per litre = 1 ppm 1 microlitre ( µL ) per litre = 1 ppm 0.001 gram per litre = 1 ppm 8.345 pounds per million gallons of water = 1 ppm

NOTE:- The metric prefix ' milli ' does NOT mean a millionth,
it stands for a thousandth. See the prefix table...

#### Some associated conversion factors:-

 1 acre-foot = 43,560 cubic feet 1 acre-foot = 325,850 gallons 1 acre-foot of water = 2,718,144 pounds 1 cubic foot of water = 62.4 pounds 1 cubic foot of water = 6.24 Imperial gallons 1 US gallon of water = 8.34 pounds 1 Imperial gallon of water = 10 pounds 1 US gallon of water = 3,785 grams or 3.785 kg 1 litre of water = 1,000 grams = 1 kg (approx) 1 litre of water = 1,000 cubic centimetres (cc) 1 cubic metre = 1,000 litre 1 cubic metre = 1 metric tonne of water (appx.) 1 US fluid ounce = 29.57 grams 1 US fluid ounce = 1.043 ounces (av)

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 av = avoirdupois cm = centimetres cc, cu.cm, cm3, cm^3 = cubic centimetre fl oz = fluid ounce fl pt = fluid pint fl qt = fluid quart ft = foot, feet cu.ft. , ft3, ft^3 = cubic foot gal., gals = gallon g, gm = gram gr = grain in., ins = inch, inches cu.in. in3, in^3 = cubic inch kg = kilogram lb., lbs = pound l, L = litre, liter m = metre, meter cu.m. , m3, m^3 = cubic metre oz., ozs = ounce yd., yds = yard

NOTE:- In the metric system, upper case letters usually mean something
different to lower case letters. For instance, k = kilo and K = Kelvin
Litre is an exception to avoid the small l looking like number 1; l or L is ok.

Thanks to the Mississippi State University Extension Service for some of the information.

For metric conversions go to a unit starting with -
a b c d e f g h i j k l m n o p q r s t u v w y

Related pages
 " Home page " Info on SI Units " SI Unit Descriptions " SI Derived Units " SI Prefixes (mega, giga) " Imperial/UK Units " Scientific Notation   (i.e. what is 1.00E+09)
Detail pages
 " Feet to metres calculator " Metres to feet calculator " British Thermal Units Btu " Density of bulk materials " Density of liquids " Specific Gravity of water " Density of metals " Density of woods " Kitchen metric " Medical metric " Parts per million - ppm " Clothing metric " Yarn metric " Time " cc to hp " Paper & Envelopes " Gross to Nett price " Nett to Gross price " Add on Commission " Sheet metal swg - mm " Wire & rod swg - awg " Electrical wire swg - awg " Steam tables (4 pages) " Watts, amps, volts, ohms " M Threads & spanners
Other useful sites
 " A guide to earning money on the internet

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