Grow light running cost calculator (UK)
Calculate weekly, monthly and yearly grow-light electricity cost from watts, hours and your own pence-per-kWh rate.
Hydroponics tools
Three small calculators that show their assumptions and use your own figures.
Which hydroponic system? A practical picker
Answer five questions to get a transparent starting-system suggestion.
Hydroponic nutrient dose calculator
Scale the dose from your nutrient label to the actual litres in your tank.