About This Hydroponic Nutrient Calculator

This fast, lightweight Hydroponic Nutrient Calculator helps growers precisely mix Part A & Part B stock solutions to reach a desired EC or PPM in any reservoir size. Unlike bulky spreadsheet downloads or over-simplified charts online, this tool performs instant client‑side calculations, stores your last inputs for convenience, and adapts automatically to mobile, tablet, and desktop screens. It supports multiple PPM conversion scales (500, 640, 700), flexible A:B ratios, growth stage guidance, and dynamic strength factoring so you can dial in exact milliliters required before pouring a single drop.

How to Use

Enter your reservoir volume and choose whether you want to work in EC or PPM. Provide current and target readings, set your preferred PPM factor if needed, and add approximate stock strength values (the EC rise caused by 1 ml per liter for each part). Pick a growth stage to view a recommended range. Click Calculate to instantly get separate amounts for Part A and Part B, total ml to add, projected final PPM, and guidance text. You can save inputs locally and quickly adjust deltas as plants feed.

Practical Tips

Always add nutrients gradually while circulating and re‑measuring—overshooting EC is harder to correct. Mix Part A thoroughly before adding Part B to avoid precipitation. Keep pH in range after nutrients are dissolved (typically 5.6–6.1 for most systems). Warmer water accelerates uptake; monitor root zone temperature alongside EC drift. Replace or top up reservoirs when drift becomes unstable. Record target values per cultivar so you can repeat successful runs effortlessly.