Nutrient Calculator

Get exact nutrient mixing amounts for your crop, growth stage, and preferred brand. No guesswork.

Crop

Growth Stage

Nutrient Brand

Water Volume

gal L

Crop

Growth Stage

Nutrient Brand

Water Volume

gal L

System Type

Source Water pH

Source Water EC

mS/cm

I don't know my water EC

Water Hardness (optional)

ppm CaCO3

I don't know my water hardness

Check your city water report or test with a hardness kit. Improves calcium accuracy for DIY formulations.

Educational tool only. Verify all formulations with independent sources before use. Use at your own risk.

Target Ranges

pH Range

EC / PPM Target

PPM values use the 500 scale (Hanna, Milwaukee). Bluelab and Truncheon meters use the 700 scale. To convert: multiply our PPM by 1.4 for 700-scale readings.

Why These Targets?

Nutrient Mixing Amounts

Component	Per Gallon	Your Total

Element Breakdown (PPM)

Target vs. achieved parts per million for each element. Click any element to learn why.

Element breakdown showing target vs. achieved PPM
Element	Target	Achieved	Status

pH Adjustment

System-Specific Note

Tips & Supplements

Tools You'll Need

To mix and verify this formulation, you'll want these on hand:

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Deficiency Watch

Common issues to watch for at this growth stage:

How to Use

Select your crop and growth stage
Choose your nutrient brand
Enter your water volume
Switch to Advanced for pH guidance and system-specific tips
Use the Print button to take results to your grow room

Important

These are general guidelines based on common hydroponic practices. Always check the manufacturer's label for specific instructions. Start with lower concentrations and increase gradually. When in doubt, less is more.

Quick Reference

Unit conversion quick reference
Measurement	Equivalent
1 tsp	= 4.93 ml
1 tbsp	= 3 tsp = 14.79 ml
1 gallon	= 3.785 liters
EC 1.0	= ~500 PPM (500 scale)
EC 1.0	= ~700 PPM (700 scale)

My Saved Formulations

Need a System to Grow In?

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