Nutrient Mixing & Dilution Calculator

Nutrient Mixing & Dilution Calculator

Mix with confidence. Target by EC/PPM, scale label rates, or use classic C1V1 & ratio dilutions. Supports single, 2‑part, and 3‑part nutrients with water EC baseline and growth stage presets. Prefer help? Talk to a Grow Expert.

Shop Nutrients Open Calculator Mixing Plant Nutrients Guide

Nutrient Mixing & Dilution

Choose a mode: EC/PPM Target (single/2‑part/3‑part), Label Rate Batcher, or C1V1 / Ratio.

Tip: EC is the gold standard. Conversions: ppm500 = EC × 500 and ppm700 = EC × 700. Start with your water EC to avoid overfeeding.
Guidance only — always follow crop & product specifics.
Measure a sample of your concentrate (or a fixed pre‑mix) with your EC/TDS meter.

Frequently Asked Questions

Should I use EC or PPM?

Use EC whenever possible. PPM is a conversion and depends on your meter scale (500 or 700). This calculator supports both but performs calculations in EC for consistency.

How accurate is linear EC mixing?

Across normal horticultural ranges, EC tends to scale approximately linearly with concentration. At very high strengths or with unusual chemistries, deviations can occur—always confirm with your meter after mixing.

What order should I add nutrients?

Never combine concentrates directly. Add Part A to water and stir thoroughly, then Part B (and C) one at a time. Many growers add silica first and adjust pH last. Always follow your product’s label.

What about starting water quality?

Enter your source water EC so the calculator subtracts this baseline to avoid overfeeding. Hard water may require brand‑specific adjustments.

Can I use this for powders?

Yes. Use the C1V1 mode to make stock or working solutions from powders. If you know the EC of a prepared stock, you can also use the EC/PPM Target mode.