Free calculators and planners
Calculators & Planning Tools
Use your own measurements, appliance data and tariff. Each tool shows its assumptions so you can review the result before making a purchase or electrical decision.
Water & pumps
Electrical health & planning
Home, appliances & lighting
EV, solar & security
Related guides
Use this hub to choose from the free calculators available here. The tools cover planning questions involving water tanks, pumps, electrical loads, appliance costs, EV charging, backup power and CCTV storage.
Choose the tool for your decision
Start with the question you need to answer, then open the relevant calculator shown by the hub. Keep the source values, units and practical limits for your own installation ready before entering data.
Understand the result
Each calculator is a planning aid for its stated purpose. Read its inputs, output labels, assumptions and warnings before using the result. A planning estimate is not a quotation, approval, installation design or guarantee of savings or performance.
Verify before acting
Check important inputs against bills, equipment labels, drawings or site measurements. For electrical, structural, water-system, CCTV or purchase decisions, ask the appropriate qualified professional or supplier to confirm the final design, compatibility, capacity and applicable requirements.