Solar Panel Angle Calculator: Tilt, Direction and Row Spacing
Calculate solar panel tilt by latitude, season or date, with true-direction guidance, monthly solar-noon angles and optional row spacing.
Home Energy and Consumption Calculations
Estimate household or small-business electricity use from the equipment you actually operate. Start with an appliance load list, then enter quantity, electrical input watts, daily operating hours and the fraction of those hours drawing the stated power. The Electricity Cost Calculator reports kWh and energy charges for each load using your chosen number of days and tariff. It supports scenario comparisons, input links and a downloadable inventory. Use 100% duty when your watt value is already an average over the entered operating window. For lighting upgrades, compare the existing and proposed input power at the required light output, then include purchase and installation costs when assessing payback. Generator planning is a separate task because starting demand and transient performance matter. Browse the tools below and read each model’s assumptions.
Appliance electricity calculators
Refrigerator Electricity Cost Calculator
TV Electricity Cost Calculator
Microwave Electricity Cost Calculator
Space Heater Electricity Cost Calculator
Freezer Electricity Cost Calculator
Ceiling Fan Electricity Cost Calculator
Air Fryer Electricity Cost Calculator
Calculate air fryer electricity cost with your appliance data, operating pattern and tariff. Includes formulas and worked examples.
Laptop Electricity Cost Calculator
Calculate laptop electricity cost with your appliance data, operating pattern and tariff. Includes formulas and worked examples.
Ceiling Fan Electricity Cost Calculator
Calculate ceiling fan electricity cost with your appliance data, operating pattern and tariff. Includes formulas and worked examples.
Freezer Electricity Cost Calculator
Calculate freezer electricity cost with your appliance data, operating pattern and tariff. Includes formulas and worked examples.