Electricity Running Cost
Estimate an appliance's energy use and cost from wattage and operating time.
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How to use this tool
- Read the appliance wattage and enter its expected daily running time.
- Enter your own tariff per kWh and the period to calculate.
Things to know
- Assumes the stated constant power while running. Standing charges and variable duty cycles are excluded.
- Bounded non-negative decimal values; daily hours 0-24. Fixed arithmetic produces four summaries.
- Use no more than 200,000 characters across the input and settings.
- Bounded decimal inputs mean at most 120 characters, zero or a magnitude from 10^-100 to 10^100. Arithmetic uses 40-digit precision; exponent suffixes are checked before parsing.
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