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 Refresh and Visual Polish

8/11/2026

We've just rolled out a light visual update across Hydro-Calc and our documentation to make the site cleaner and easier to read!

What's New

Visual Polish: Refreshed colors, headers, and spacing across the site so everything looks more consistent on desktop and mobile screens.
Updated Screenshots: Refreshed all images throughout our documentation guides so walkthroughs match the app.

No major changes have been made to your saved mixtures, nutrient targets, shelf inventory, or calculators—everything continues to work just as before.

If you spot any visual glitches or run into any issues while using the site, please let us know using the Feedback button in the app. Happy growing!

Hydro-CalcPrecision Hydroponics