Fertilizer NPK Calculator
Enter each fertilizer analysis and the blend ratio to see the resulting NPK percentages locally.
Enter comma-separated N,P,K percentages and blend parts. No application advice.
A QUICK WALKTHROUGH
How to use this tool
- Enter N, P, and K percentages for two fertilizers.
- Enter the blend parts for A and B.
- Calculate the weighted NPK result and adjust the ratio manually if needed.
User-defined mixture math
Each result is (A nutrient × A parts + B nutrient × B parts) ÷ total parts. Values are analysis percentages you enter, not product recommendations.
GOOD TO KNOW
Common questions
Does it recommend how much fertilizer to apply?
No. It only calculates the blend analysis from your inputs.
Does it include fertilizer products?
No. Enter both analysis values yourself.