Calculator

Home Energy Use Calculator

Estimate monthly kWh and rand cost from common household appliances and your own devices.

How it is calculated

Daily energy (kWh) = watts × quantity × hours ÷ 1,000. Monthly energy = daily energy × days. Cost = monthly kWh × your rate.

Results are estimates for planning, not bills or professional advice. For generator or inverter hookups use a changeover switch installed by a registered electrician with a certificate of compliance (CoC).

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