Electricity Consumption Calculator
Fast, accurate, and free online Electricity Consumption Calculator tool that runs directly in your browser.
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}
Name
| Name | Moc [W] | Standby [W] | Szt. | Hours/day | Days/month | |
|---|---|---|---|---|---|---|
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This documentation describes the Livewire add-on, which estimates electricity consumption and bill cost based on the list of devices, operating time and the full basket of fees. It includes a description of input fields, a step-by-step algorithm, examples with numbers, cost formulas, integration with live JSON data, as well as an FAQ, checklist and UX tips. The text is consistent with the shared code of theEnergyConsumptionCalculatorclass and view.
What the calculator does and who it is intended for
The calculator calculates daily, monthly and annual energy consumed by defined devices, and then converts it into a cost that includes active energy, variable and constant distribution, capacity fee, transition fee, system surcharges and VAT. The model supports two sectors. Households and companies. The user can apply predefined G11, G12 and G12w tariffs or switch to custom mode and enter their own rates. The tool is useful when planning a household budget, auditing a workplace, calculating the impact of equipment modernization and in conversations with an energy supplier. The interface allows you to build a list of devices manually or add items from templates with one click.
Form fields and meaning of units
| Field | Description | Unit | Notes |
|---|---|---|---|
| sector | Recipient's sector | enum | household or business, only affects the tariff logic in your project |
| tariff | Tariff variant | enum | g11, g12, g12w, custom. In this addon, you enter the parameters manually, the modes are labeled UX |
| energy_price | Active energy price | PLN/kWh | gross rate per kWh |
| dist_var | Variable distribution | PLN/kWh | distributor variable rate |
| dist_fix | Fixed distribution | PLN/month | monthly constant independent of kWh |
| capacity_fee | Capacity fee | PLN/month | modeled as a fixed |
| transit_fee | Transit fee | PLN/month | monthly constant |
| oze_fee | RES fee | PLN/kWh | kWh rate |
| cogen_fee | Cogeneration fee | PLN/kWh | kWh rate |
| quality_fee | Quality fee | PLN/kWh | kWh rate |
| excise | Excise tax | PLN/kWh | kWh rate |
| vat | VAT | % | tax rate calculated at the end from the net sum |
| live_url | Live parameters | URL | address returning JSON with rate fields to overwrite |
In the devices section, each item has a name, working power, standby power, number of pieces, working hours per day and number of days in a month. Thanks to this, the calculator counts not only active energy, but also standby consumption.
Energy calculation formulas
// Energy for one device
wh_day = (power_w * hours_per_day + standby_w * max(0, 24 - hours_per_day)) * qty
kwh_day = wh_day / 1000
kwh_month = kwh_day * days_per_month
// Summarizing over all devices
kwh_month_total = Σ kwh_month
kwh_year_total = kwh_month_total * 12
//Data for the device graph
by_device_month = [{ name, kwh }, ...]The model assumes that the device operates a certain number of hours at rated power, an