Electrical Calculators
converter.ee provides accurate electrical calculators for engineers, electronics enthusiasts, EV owners, and homeowners. All calculations are performed directly in your browser — no data is sent to any server.
Electrical(5)
kW ↔ Horsepower
Convert kilowatts to mechanical horsepower (hp) and metric PS
Power ↔ Current
Calculate current for DC, single-phase and three-phase AC circuits
kVA ↔ kW
Convert apparent power (kVA) to real power (kW) and calculate power factor
Torque, Power & RPM
Calculate the relationship between torque, power and rotational speed
Motor Efficiency Savings
Calculate energy savings from upgrading motor efficiency class (IE2→IE3→IE4)
Battery & EV(6)
Ah ↔ Wh
Convert amp-hours to watt-hours using battery voltage
Battery Runtime
Calculate how long a battery will last under a given load
Battery Charging Time
Calculate battery charging time based on charger current
EV Charging Time
Calculate electric vehicle charging time based on charger power
EV Charging Cost
Calculate the cost to charge your electric vehicle
EV vs Petrol
Compare EV and petrol car running costs and CO₂ emissions
Household(4)
Appliance Electricity Cost
Calculate the electricity cost of a home appliance per day, month and year
Watts ↔ kWh
Convert watts to kilowatt-hours for a given usage period
Standby Electricity Cost
Calculate standby power cost — find out what it really costs
Solar Savings
Calculate annual solar savings from self-consumption and grid export