Wattage Calculator: Use this to determine the light wattage
you will need for your size grow room.
Parts Per Million Calculator: Use this calculator to determine
accurate solution mixes.
Carbon Dioxide(CO2) Calculator: Calculate how much CO2 will be needed
to fill a grow room to the optimum level.
Temperature Converter: Use this to easily convert between degrees
Celcius and Fahrenheit.
Air Exchange Calculator: Enter your grow room dimensions, and this
will tell you how powerful of a fan you will need for optimum air flow.
Estimated Cost Calculator: Predicts how much the cost for electricity
will be monthly.
On the web here: http://www.hydroponicsdictionary.com