Free calculatorsHome
Home decisions often require more than one measurement. This category brings together tools for estimating electricity use, solar production, battery runtime, room heating, lighting, hot water and room volume. Simply choose the subcategory that interests you, then open the tool you need.
Energy & backup
Track consumption, solar output, battery runtime and appliance cost using real data.
Linky electricity data analyser
Explore a French Linky meter export and compare electricity tariffs locally in your browser.
Electricity Cost Calculator
Calculate appliance running cost from power, usage time and electricity price.
Solar Panel Calculator
Estimate daily solar production in kWh from installed power, equivalent sunshine hours and system losses.
Battery Runtime Calculator
Estimate battery runtime from capacity, voltage and power consumption.
Heating & comfort
Estimate heating power and hot-water capacity for household use.
Water & everyday use
Measure shower use by connecting time, flow, energy and cost.
Volumes & spaces
Calculate room, pool or moving volumes to choose suitable equipment.
Lighting
Estimate spotlights from room area and the target light level.
Kitchen
Convert a recipe’s millilitres into centilitres and litres.