HOW to calculate NPK ratio of feed

Can anyone explain to me how to fully get the NPK of all the nutes I’m feeding together?
The way I’m doing it seems to be wrong.

need to get the total NPK of the full feed that I’m giving out to my girls.

Excel tool

What are you feeding?

You can but N, P and K in separate bottles/powders and mix it up.
I think if you need to re calculate nutrient formulas then NPK isn't your problem.

I found this link to an Oaksterdam University article. I think it's what you're looking for.

TintEastwood said:

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Understanding and Calculating Nutrient PPM

Understanding and Calculating Nutrient PPM PPM (Parts Per Million) can seem like a mystery but it’s actually very simple. Basically the idea is to quantify how much “stuff” is in your water. PPM is commonly measured by a grower using an electronic pen which measures the electrical conductivity...

www.rollitup.org

What are you feeding?

Click to expand...

Not looking for ppm
Looking to figure out the total NPK of my feed with everything in it

The NPK % can be calculated from the NPK PPM. I'm sure there are other ways.

Jacks example.

This is what I'm feeding per gallon.



I use this calculator on the web to reverse calc the combined NPK % ratio.
Fudge around with the mixing units and percentages until the PPM matches above NPK feed ppm.



NPK % RATIO = 1.32 : 1 : 2.17


It can be good to know all the PPM levels. They have their own PPM ratios.




Hope that's of some help.