Hydroponic Solver

Hydro-Calc automatically calculates the exact amounts of nutrient salts needed to hit your target PPMs.

Fertilizer Optimization

Control solver settings and optimize mixtures by setting minimums, maximums, and more to hit nutrient targets perfectly.

Share & Clone Recipes

Share created fertilizer mixtures, import recipes from others, or clone inputs to match specific target outputs.

Grow Environment Setup

Manage your targets, custom substances, and source water quality to tailor calculations to your hydroponic system.

Grow & Feed Logs

Track nutrient applications, measure EC, pH, and temperature, and monitor fertilizer costs over time.

Nutrient Database

Access pre-loaded nutrient profiles and 50+ global fertilizer substances.

Advanced Hydroponic Nutrient Calculator & Optimization

Welcome to Hydro-Calc, the ultimate hydroponic calculator and fertilizer optimization platform designed for modern growers, agronomists, and hydroponics enthusiasts. Whether you are balancing macronutrients, customizing micro-elements, or adjusting source water chemistry, Hydro-Calc helps you achieve the perfect recipe.

By leveraging advanced linear programming, this tool automatically determines the most cost-effective and precise combination of fertilizer substances to hit your exact target PPMs. Take control of your crop steering, optimize your feed schedules, and track your water quality with professional-grade tools.

Latest Update

UX Package Upgrade

8/22/2026

We've upgraded our UX package across Hydro-Calc, bringing a round of layout and interaction refinements to make every screen feel tighter and easier to use.

What's New

Better Layouts on Every Device: Reworked spacing and alignment throughout the editor so tables, forms, and panels fit properly on phones, tablets, and desktops—no more clipped columns or awkward empty gaps.
Cleaner Forms & Settings: Editor forms and the settings page are now neatly centered instead of hugging one side, giving everything a more balanced look.
Clearer Mixture Editor Toolbar: The Calculate Top-Off button now sits right beside Create Target, keeping mixture actions together and leaving the optimization controls as their own group.
Fully Visible Limit Tables: Nutrient and substance limit tables in the mixture editor now show every column, including Low and High values, without hidden scrolling.
Crisper Charts: Improved chart colors and axis labels so trends in your feed logs and nutrient analyses are easier to read at a glance.
Refreshed Documentation: All guides now feature up-to-date screenshots that match the latest interface.

As always, if anything looks off or isn't working as expected, please leave us feedback using the Feedback button in the app. Happy growing!

Hydro-CalcPrecision Hydroponics