Online electricity consumption calculator. Calculate the consumption and cost of electricity for your home, office or construction site.
Calculate electricity consumption and cost for household and building appliances
An online electricity consumption calculator will help you calculate how much electricity your household or building appliances consume per day, month and year. Suitable for cost estimation, tariff selection and energy efficiency analysis.
The electricity consumption calculator uses standard formulas to calculate electricity consumption. The calculation is based on the power of the appliances, operating time, number of appliances, load factor and electricity tariff. Formula: Consumption (kWh) = Power (kW) × Operating time (h) × Quantity × Load factor. Cost = Consumption × Tariff. The calculator supports single-phase (220 V) and three-phase (380 V) electrical networks. You can add several devices and calculate the total consumption with visualization of the results.
Let's look at practical examples of calculating energy consumption for various use scenarios:
Calculation of consumption of basic household appliances in an apartment
Входные данные:
Refrigerator: 150 W, 24 h/day
TV: 100 W, 5 hours/day
Computer: 200 W, 8 hours/day
Washing machine: 2000 W, 2 hours/day (3 days/week)
Tariff: 5.5 ₽/kWhРасчёт:
Refrigerator: 150 W × 24 hours × 30 days = 108 kWh/month
TV: 100 W × 5 hours × 30 days = 15 kWh/month
Computer: 200 W × 8 hours × 30 days = 48 kWh/month
Washing machine: 2000 W × 2 hours × 12 days = 48 kWh/month
Total consumption: 108 + 15 + 48 + 48 = 219 kWh/month
Cost: 219 × 5.5 = 1,204.5 ₽/monthРезультат:
Consumption: 219 kWh/month, Cost: 1,204.5 ₽/month
Тип:
Household appliances
The refrigerator consumes the most electricity due to 24/7 operation
Calculation of consumption of construction tools on site
Входные данные:
Grinder: 2000 W, 6 hours/day
Drill: 800 W, 4 h/day
Hammer: 1500 W, 3 h/day
Lighting: 500 W, 12 h/day
Tariff: 5.5 ₽/kWh, Working days: 20 days/monthРасчёт:
Grinder: 2000 W × 6 hours × 20 days = 240 kWh/month
Drill: 800 W × 4 hours × 20 days = 64 kWh/month
Hammer: 1500 W × 3 hours × 20 days = 90 kWh/month
Lighting: 500 W × 12 hours × 20 days = 120 kWh/month
Total consumption: 240 + 64 + 90 + 120 = 514 kWh/month
Cost: 514 × 5.5 = 2,827 ₽/monthРезультат:
Consumption: 514 kWh/month, Cost: 2,827 ₽/month
Тип:
Construction
Construction tools consume a lot of energy due to high power
Calculation of office equipment consumption
Входные данные:
Computers (10 pcs): 150 W, 8 hours/day
Printers (3 pcs): 300 W, 2 hours/day
Air conditioning: 2000 W, 10 h/day
Lighting: 2000 W, 8 hours/day
Tariff: 5.5 ₽/kWh, Working days: 22 days/monthРасчёт:
Computers: 150 W × 10 pcs × 8 hours × 22 days = 264 kWh/month
Printers: 300 W × 3 pcs × 2 hours × 22 days = 39.6 kWh/month
Air conditioner: 2000 W × 10 hours × 22 days = 440 kWh/month
Lighting: 2000 W × 8 hours × 22 days = 352 kWh/month
Total consumption: 264 + 39.6 + 440 + 352 = 1,095.6 kWh/month
Cost: 1,095.6 × 5.5 = 6,025.8 ₽/monthРезультат:
Consumption: 1,095.6 kWh/month, Cost: 6,025.8 ₽/month
Тип:
Office
The air conditioner is the main consumer of electricity in the office
Calculation using a two-tariff meter
Входные данные:
Washing machine: 2000 W, 2 h (night rate)
Heater: 1500 W, 8 h (night rate)
Lighting: 500 W, 4 h (daily rate)
Daily tariff: 6 ₽/kWh
Night tariff: 2.5 ₽/kWhРасчёт:
Night rate:
Washing machine: 2000 W × 2 h = 4 kWh/day × 2.5 ₽ = 10 ₽/day
Heater: 1500 W × 8 h = 12 kWh/day × 2.5 ₽ = 30 ₽/day
Daily rate:
Lighting: 500 W × 4 h = 2 kWh/day × 6 ₽ = 12 ₽/day
Daily cost: 10 + 30 + 12 = 52 ₽/day
Monthly cost: 52 × 30 = 1,560 ₽/monthРезультат:
Daily cost: 52 ₽/day, Monthly cost: 1,560 ₽/month
Тип:
Two-tariff meter
Using a night tariff allows you to save up to 60% of the cost
Calculation for devices with variable load
Входные данные:
Air conditioner: 3000 W (max), load factor 60%
Heater: 2000 W (max), load factor 70%
Tariff: 5.5 ₽/kWh, Work: 12 hours/dayРасчёт:
Air conditioning:
Effective power: 3000 W × 0.6 = 1,800 W
Consumption: 1,800 W × 12 h = 21.6 kWh/day
Heater:
Effective power: 2000 W × 0.7 = 1,400 W
Consumption: 1,400 W × 12 h = 16.8 kWh/day
Total consumption: 21.6 + 16.8 = 38.4 kWh/day
Monthly consumption: 38.4 × 30 = 1,152 kWh/month
Cost: 1,152 × 5.5 = 6,336 ₽/monthРезультат:
Consumption: 1,152 kWh/month, Cost: 6,336 ₽/month
Тип:
With load factor
The load factor takes into account that the devices are not operating at full power
Savings from using LED lamps and energy-efficient equipment
Входные данные:
Conventional lamps (10 pcs × 60 W): 600 W, 8 hours/day
LED lamps (10 pcs × 9 W): 90 W, 8 hours/day
Old refrigerator: 200 W, 24 h/day
New refrigerator A+++: 100 W, 24 h/day
Tariff: 5.5 ₽/kWhРасчёт:
Regular lamps:
Consumption: 600 W × 8 h × 30 = 144 kWh/month
Cost: 144 × 5.5 = 792 ₽/month
LED lamps:
Consumption: 90 W × 8 h × 30 = 21.6 kWh/month
Cost: 21.6 × 5.5 = 118.8 ₽/month
Old refrigerator:
Consumption: 200 W × 24 h × 30 = 144 kWh/month
Cost: 144 × 5.5 = 792 ₽/month
New refrigerator:
Consumption: 100 W × 24 h × 30 = 72 kWh/month
Cost: 72 × 5.5 = 396 ₽/month
Savings: (792 - 118.8) + (792 - 396) = 1,069.2 ₽/monthРезультат:
Savings: 1,069.2 ₽/month (85% reduction in consumption)
Тип:
Energy efficiency comparison
Energy-efficient appliances can reduce consumption by 50-85%
The calculator uses the formula: Consumption (kWh) = Power (kW) × Running time (h) × Load factor
Среднее потребление электроэнергии для различных типов помещений и использования:
200-400 кВт⋅ч/мес
500-1500 кВт⋅ч/мес
800-2000 кВт⋅ч/мес
500-2000 кВт⋅ч/мес
Среднее потребление электроэнергии основных бытовых приборов:
30-150 кВт⋅ч/мес
200-500 кВт⋅ч/мес
30-60 кВт⋅ч/мес
40-100 кВт⋅ч/мес
1-3 кВт⋅ч/мес
10-30 кВт⋅ч/мес
300-800 кВт⋅ч/мес
2000-5000 кВт⋅ч/мес
Calculation of energy consumption in watts and kilowatt-hours, taking into account all parameters
Support for single-phase and three-phase electrical networks
Accounting for operating time, number of devices and load factor
Possibility to specify the tariff in rubles, dollars, euros and other currencies
Consumption distribution graph by appliance for clarity
Export data to PDF and CSV for further use
Our energy consumption calculator provides many benefits for accurately calculating energy consumption.
Uses up-to-date formulas and coefficients
Supports various types of networks and devices
Accounting for power, operating time and tariffs
Ability to save results as PDF or CSV
There are several ways to reduce energy consumption:
Enter the power of the device, operating time and quantity - the calculator will show the consumption.
Yes, it is enough to indicate the tariff for 1 kWh.
1 kWh = 1000 W times the number of operating hours divided by 1000.
Yes, the calculator supports calculations for a list of devices.
Yes, there are fields for day and night rates.
Yes, you can specify the network type and voltage.
The results are automatically recalculated by month and year.
Yes, there is a “commercial use” mode.
The results are displayed in a chart by device.
Yes, results can be saved in PDF or CSV format.
Yes, the calculator takes into account the effective power (real load).
To calculate electricity consumption in a private home, indicate all electrical appliances used: lighting, heating, household appliances, pumps, wells and others. For example, a house with heating, lighting, household appliances: total consumption can be 500-1500 kWh/month depending on the area and number of appliances. The calculator allows you to add all devices and calculate the total consumption.
To calculate the energy consumption for the heating system, indicate the power of the heaters, operating time and the number of devices. For example, a 2000 W electric convector operating 12 hours a day: consumption 2 kW × 12 hours × 30 days = 720 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 3,960 ₽/month. The calculator takes into account all parameters.
To calculate the power consumption of an air conditioner, enter the power consumption of the air conditioner (not cooling power), operating time and load factor. For example, a 1500 W air conditioner running 8 hours a day at 70% load factor: effective power 1,050 W, consumption 1.05 kW × 8 hours × 30 days = 252 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 1,386 ₽/month.
To calculate the power consumption for a computer, indicate the power of the power supply or actual consumption, operating time and the number of computers. For example, a 250 W computer running 10 hours a day: consumption 0.25 kW × 10 hours × 30 days = 75 kWh/month. With a tariff of 5.5 ₽/kWh, the cost is 412.5 ₽/month. Gaming computers consume more energy.
To calculate the energy consumption of a refrigerator, keep in mind that the refrigerator does not operate constantly, but turns on when necessary. Specify the average power of the refrigerator (usually 100-200 W) and take into account operation 24 hours a day with a load factor of 30-50%. For example, a 150 W refrigerator with a load factor of 40%: effective power 60 W, consumption 0.06 kW × 24 hours × 30 days = 43.2 kWh/month.
To calculate your meter's electricity consumption, record the readings at the beginning and end of the period. The difference will show consumption. For example, beginning of the month: 1,500 kWh, end of the month: 1,750 kWh. Consumption: 250 kWh. At a tariff of 5.5 ₽/kWh, the cost is: 250 × 5.5 = 1,375 ₽. The calculator helps check whether actual consumption corresponds to calculated values.
To calculate monthly electricity consumption, multiply daily consumption by 30 days or use a calculator indicating the days of operation per month. For example, daily consumption 7 kWh: monthly consumption 7 × 30 = 210 kWh. With a tariff of 5.5 ₽/kWh, the cost per month is: 210 × 5.5 = 1,155 ₽. The calculator shows consumption both per day and per month.
To calculate the cost of electricity for construction, indicate all construction tools and equipment: concrete mixers, welding machines, grinders, drills, hammer drills, lighting. For example, a facility with 5 tools with a total power of 8 kW, operating 8 hours per day, 20 days per month: consumption 8 kW × 8 hours × 20 days = 1,280 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 7,040 ₽/month.
To calculate the energy consumption for LED lamps, indicate the lamp power, number of lamps, operating time and number of days. LED lamps consume 6-10 times less energy than incandescent lamps. For example, 10 LED lamps of 9 W (instead of 60 W), operating 6 hours a day: consumption 0.09 kW × 10 pcs × 6 hours × 30 days = 162 kWh/month. Savings compared to incandescent lamps: about 85%.
To calculate the energy consumption for a washing machine, indicate the power of the machine (usually 2000-2500 W), the operating time of one wash cycle and the number of washes per week/month. For example, washing machine 2000 W, one cycle 2 hours, 2 times a week: consumption 2 kW × 2 hours × 8 times a month = 32 kWh/month. With a tariff of 5.5 ₽/kWh, the cost is 176 ₽/month.
To calculate the energy consumption of a dishwasher, indicate the power of the machine (usually 1500-2000 W), the operating time of one cycle (usually 1.5-2 hours) and the number of cycles. For example, dishwasher 1800 W, one cycle 1.5 hours, 1 time per day: consumption 1.8 kW × 1.5 hours × 30 days = 81 kWh/month. With a tariff of 5.5 ₽/kWh, the cost is 445.5 ₽/month.
To calculate the energy consumption for an electric boiler, indicate the boiler power, operating time per day and the duration of the heating season. For example, a 10 kW boiler operating 12 hours a day: daily consumption 10 kW × 12 h = 120 kWh, monthly consumption 120 × 30 = 3,600 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 19,800 ₽/month. Electric heating is expensive.
To calculate the electricity consumption for a water heater, indicate the boiler power and operating time. The water heater cycles to maintain temperature. For example, a 2000 W boiler running 4 hours a day: consumption 2 kW × 4 hours × 30 days = 240 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 1,320 ₽/month. Savings: use the night tariff and adjust the temperature.
To calculate the energy consumption for an electric heated floor, indicate the power per m² (usually 80-150 W/m²), heating area, operating time per day and load factor. For example, underfloor heating 100 W/m² on an area of 20 m², operating 8 hours a day with a load factor of 50%: effective power 20 m² × 100 W × 0.5 = 1,000 W, consumption 1 kW × 8 hours × 30 days = 240 kWh/month.
To calculate the energy consumption for an electric stove, indicate the power of the burners, operating time and number of uses. For example, a stove with a 2000 W burner operating 2 hours a day: consumption 2 kW × 2 hours × 30 days = 120 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 660 ₽/month. Electric stoves consume a lot of energy when operating.
To calculate the electricity consumption for a well pump, indicate the pump power, operating time per day and load factor. For example, a 1000 W pump running 2 hours a day: consumption 1 kW × 2 hours × 30 days = 60 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 330 ₽/month. The pumps operate in cycles to maintain pressure.
To calculate the energy consumption for ventilation, indicate the fan power, operating time and the number of fans. For example, a 150 W fan running 12 hours a day: consumption 0.15 kW × 12 hours × 30 days = 54 kWh/month. With a tariff of 5.5 ₽/kWh, the cost is 297 ₽/month. Ventilation operates around the clock to maintain air quality.
To calculate the energy consumption of chargers, indicate the charger power and charging time. Typically, phone chargers have a power rating of 5-15W. For example, a 10W charger running 3 hours per day: consumption 0.01 kW × 3 hours × 30 days = 0.9 kWh/month. Despite the low consumption, it is worth turning off the chargers after charging.
To calculate the power consumption for a home theater, indicate the power of all components: TV, receiver, subwoofer, speakers. For example, a system with a total power of 500 W, operating 4 hours per day: consumption 0.5 kW × 4 hours × 30 days = 60 kWh/month. With a tariff of 5.5 ₽/kWh, the cost: 330 ₽/month. Cinemas consume a lot of energy during playback mode.