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I want a certain nitrogen concentration (ppm), and I want to know what the EC should be.
I have the fertilizer label which gives an example of an EC of some nitrogen concentration.

mS or mmho

What is the desired nitrogen concentration? ppm

What is the EC of the clear water only? mS or mmho

Result:

I want to adjust my injector to give a particular Electrical Conductivity (EC).
I know the EC of the solution currently provided by the injector.

mS or mmho

What is the EC of the clear water only? mS or mmho

What is the current injector ratio? 1: ppm

mS or mmho

Result:

I have the EC of my fertilizer solution and I want to know the nitrogen concentration (ppm).
I have the fertilizer label which gives an example of an EC of some nitrogen concentration.

From the label, a concentration of ppm N corresponds to an EC of mS or mmho

What is the EC of the current total solution? mS or mmho

What is the EC of the clear water only? mS or mmho

Result:

I want to know how many ounces of fertilizer to mix per gallon of stock solution to be injected at a certain injector ratio to get a certain concentration of nitrogen.
I have the fertilizer label which gives an example of how many ounces per gallon for some concentration of nitrogen at some injector setting.

What is the desired nitrogen concentration? ppm N

From the label, to achieve a concentration of ppm N at an injector ratio of 1 : , mix ounces of fertilizer per gallon of stock solution.

What injector ratio will be used? 1 :

Result:

I want to know how many ounces of fertilizer to mix per gallon of stock solution to be injected at a certain injector ratio to get a certain concentration of nitrogen.
I don't have mixing instructions from the fertilizer label, but I know the percentage of nitrogen in the fertilizer.

What is the desired nitrogen concentration? ppm N

What injector ratio will be used? 1 :

What is the nitrogen percentage of the fertilizer? %
(As a whole number. For example, for 20-20-20 input "20")>

Result:

I want to know how many gallons of stock solution I need to mix a full bag of fertilizer instead of weiging out portions.
I know how many ounces of fertilizer are needed per gallon of stock solution.

What is the weight of the fertilizer bag in pounds? lbs

How many ounces of fertilizer are needed per gallon of stock solution? ounces per gallon of stock

Result: