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Electricity Cost Calculator
Estimate energy use and cost from power, daily runtime, days, and tariff.
Formula
energy_kwh = (power_w / 1000) * hours_per_day * days cost = energy_kwh * tariff_per_kwh average_daily_cost = cost / days
Assumptions
- Inputs are user-provided.
- Results are preliminary estimates.
- Load power is constant.
- Tariff is flat.
Limitations
- Variable loads and time-of-use pricing are not modeled.
- Taxes, demand charges, and fees are not included.
Methodology
Basic energy equation: kWh = kW × time.
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.