Energy Calculators
Clean energy and power sizing tools to calculate electricity bills, solar panel capacity, and backup battery requirements.
Popular Energy Calculators
Electricity Cost Calculator
Calculate electricity running costs for home appliances (AC, heater, TV, fridge) per hour, day, month, and year.
kWh Calculator
Calculate Kilowatt-Hours (kWh) from wattage and hours of use. Estimate power consumption and utility electricity expenses.
Solar Panel Calculator
Calculate required rooftop solar panel system capacity (kW), number of solar panels, roof area, and daily electricity generation.
Solar ROI Calculator
Calculate rooftop solar payback period, return on investment (ROI), annual electricity bill savings, and 25-year net financial returns.
Battery Size Calculator
Calculate battery bank storage capacity in kWh and Amp-Hours (Ah) for off-grid solar, home backup, and inverters.
Inverter Size Calculator
Calculate inverter and UPS capacity in Watts and Volt-Amps (VA) for home backup and solar power based on appliance loads.
Appliance Energy Cost Calculator
Calculate the electricity running cost of any home appliance per hour, day, month, and year from wattage and local kWh rates.
AC Electricity Cost Calculator
Calculate air conditioner electricity bill and power consumption from tonnage (1, 1.5, 2 ton), star rating, and daily usage hours.
EV Electricity Cost Calculator
Calculate monthly home electric car charging costs, cost per 100 miles, and compare savings against gasoline vehicles.
Battery Runtime Calculator
Calculate battery backup runtime in hours and minutes from Amp-hours (Ah), voltage (V), connected load (Watts), and depth of discharge.
Solar Payback Calculator
Calculate the payback period and 25-year cumulative net savings from installing a residential or commercial rooftop solar system.
All Energy Calculators (14)
Electricity Use & Cost
Electricity Cost Calculator
Calculate electricity running costs for home appliances (AC, heater, TV, fridge) per hour, day, month, and year.
kWh Calculator
Calculate Kilowatt-Hours (kWh) from wattage and hours of use. Estimate power consumption and utility electricity expenses.
Watts to kWh Calculator
Convert electrical power in Watts to energy in Kilowatt-Hours (kWh) with daily, monthly, and annual duration options.
Appliance Energy Cost Calculator
Calculate the electricity running cost of any home appliance per hour, day, month, and year from wattage and local kWh rates.
AC Electricity Cost Calculator
Calculate air conditioner electricity bill and power consumption from tonnage (1, 1.5, 2 ton), star rating, and daily usage hours.
Refrigerator Electricity Cost Calculator
Calculate refrigerator electricity running costs per month, year, and 10-year appliance lifespan based on energy ratings.
EV Electricity Cost Calculator
Calculate monthly home electric car charging costs, cost per 100 miles, and compare savings against gasoline vehicles.
Solar Planning & Returns
Solar Panel Calculator
Calculate required rooftop solar panel system capacity (kW), number of solar panels, roof area, and daily electricity generation.
Solar ROI Calculator
Calculate rooftop solar payback period, return on investment (ROI), annual electricity bill savings, and 25-year net financial returns.
Solar Payback Calculator
Calculate the payback period and 25-year cumulative net savings from installing a residential or commercial rooftop solar system.
Battery & Backup Power
Battery Size Calculator
Calculate battery bank storage capacity in kWh and Amp-Hours (Ah) for off-grid solar, home backup, and inverters.
Battery Runtime Calculator
Calculate battery backup runtime in hours and minutes from Amp-hours (Ah), voltage (V), connected load (Watts), and depth of discharge.
UPS Runtime Calculator
Calculate uninterruptible power supply (UPS) backup runtime in minutes based on VA rating, connected computer load, and battery size.
Inverter Size Calculator
Calculate inverter and UPS capacity in Watts and Volt-Amps (VA) for home backup and solar power based on appliance loads.
About Energy Calculators
Managing rising electricity tariffs and transitioning to renewable solar power requires accurate load calculations. Use our power calculators to discover the exact operating costs of household appliances, size solar PV systems for net-zero energy bills, and configure battery and inverter capacities for reliable backup.