Indoor Farming & Hydroponics Calculators
A free suite of high-performance grow-room calculators. No sign-up, runs entirely in your browser, and works on any phone.
Most-used calculators
VPD Calculator (Vapor Pressure Deficit)
Find the ideal temperature and humidity sweet spot for your plants.
Grow Tent Ventilation Calculator
Size your exhaust fan so the air in your tent turns over fast enough.
DLI Calculator (Daily Light Integral)
Convert PPFD and photoperiod into mol/m²/day for any crop.
TDS / EC / PPM Converter (500 & 700 Scale)
Convert between EC, and PPM on the 500 and 700 scales instantly.
Grams per Watt Calculator & Grow ROI Estimator
See your grams-per-watt efficiency and what a harvest really costs.