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KNF (Korean Natural Farming) Solution Calculator App gets you the correct solutions every time!
Make Seed Soak Solution, Leaf Growth, Flower, Fruit, and Enhanced Ripening Solutions accurately based on the amount of gallons or liters to be diluted.
Learn how to make and use Oriental Herbal Nutrient (OHN), Fermented Plant Juice (FPJ), Brown Rice Vinegar (BRV), Fish Amino Acid (FAA), Water-soluble Calcium Phosphate (WCP), Water-soluble Calcium (WCA), Lactic Acid Bacteria (LAB), Seawater (SEA).
Master Cho will be proud of your diligence!
Long live the natural farmer!

What’s New

Version 4.2.2

Added CheapKNF Soap Calculator
- now make soap at home with this easy calculator

Display layout fixes.

Ratings and Reviews

4.8 out of 5
9 Ratings

9 Ratings

Blob Smith ,

Support KNF!

This app is handy and I think KNF classes should be mandatory for every person in the world... Even if you know the math, buy this app and support these folks as they are truly spreading an important message!

Note: In the soap calculator KOH is listed as an ingredient but is not explained on the acronyms help page.

JDHudelson ,


For $4 you would think the app comes with more than a calculator without instructions on how to use. There’s almost nothing to this app. It could be built in an excel sheet in a few minutes.

Niko 🐻 ,

Easy to use

Super simple if you’re not looking to convert too much. We Run a 5 gallon bucket and a 100 liter bucket. Using this makes it super simple!!
Here’s some other important conversions:

1 us teaspoon: 4.93 ml
1 us tablespoon: 14.78 ml
1 us fluid oz: 29.57 ml
1 us cup: 240 ml
1 US pint: 473.17 ml
1 us quart: 946.35 ml
1 us gallon: 3785.41 ml

(Note: us metrics are different than imperial)

Drake, you’re more than welcome to use that right by the “quick help with solutions” area. It comes in super handy!!


Eric Weinert
8.7 MB

Requires iOS 12.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

  • Siri

    Get things done within this app using just your voice.

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