Electricity Load Calculator

Connected load is each appliance’s watts times its quantity, added up: 1,200 + 320 + 150 + 120 + 1,000 = 2,790 W, or 2.79 kW. The household uses 16.65 units a day, 499.5 units over 30 days. The Inverter AC, 1.5 ton is 57.7% of it from one appliance; the 4 ceiling fans, at 26.9%, come second because they run 14 hours. The refrigerator’s 9 hours is an assumption for a cycling compressor. No tariff is built in, so the cost column is empty until you enter a rate.

Shown: an example household. Enter your own appliances above to replace it.

A 1.5-ton inverter air conditioner, taken at a typical 1,200 W, uses 288 units a month if it draws power for 8 hours a day over 30 days: 1,200 W × 8 hours = 9,600 Wh, or 9.6 units a day, and 9.6 × 30 = 288. At 4 hours a day the same unit uses 144. A 1-ton inverter unit at a typical 900 W uses 216 units at 8 hours, a 2-ton inverter unit at 1,700 W uses 408, and a non-inverter 1.5-ton unit at 1,800 W uses 432. These wattages are typical figures, not a specification: an inverter unit’s draw varies with the model, the weather and how hard the compressor is working, so check the rating plate on yours, and enter the hours the compressor is actually drawing power. One hour less a day on the 1,200 W unit is 36 units a month; a 10 W phone charger for 3 hours a day is 0.9. The rupee cost depends on your tariff slab, so take the units to the electricity bill calculator.

Connected load is the total load in kilowatts connected to the electric supply system or installed at the premises. Sanctioned load is the load in kilowatts sanctioned by the DISCO. The NEPRA Consumer Service Manual (Revised 2025) treats the load a new applicant declares on the application form as the connected load, subject to a test report from the Electric Inspector or an authorised wiring contractor and verification by the DISCO. The two meet when load grows: if you extend your load beyond the sanctioned load, a notice is issued and you must apply for extension within 15 days of receiving it, and the DISCO shall disconnect the supply if you fail to apply and complete the other formalities. Where a single-phase meter’s load approaches 5 kW, the manual provides for a notice to extend the load and for a time-of-use meter to be installed. The total this page gives is an estimate of connected load; what you draw at once is recorded by the meter as the month’s maximum demand. Compare the total with the sanctioned load on your own connection.

Source: NEPRA Consumer Service Manual (CSM), Revised 2025, definitions 23, 53 and 60, clauses 2.11.1, 2.12(1), 6.1.1.1 and 8.2.10, Annexure VI (Covering letter of 26 November 2025; read 2026-10-27).

Units a month for one appliance at this page’s typical wattage, for 1, 4 and 8 hours a day over 30 days: watts × hours × 30 ÷ 1,000. Multiply by how many you have. A refrigerator, router or UPS runs all day but a compressor cycles, so read the 8-hour column as an assumption for a fridge and use 24 hours for a router or standby load.

Pre-filled wattages for appliances common in Pakistani homes. They are the site's own round figures for each appliance type, not from a standard, a survey or a manufacturer, and some are rated input while some are typical running input (an inverter air conditioner's draw varies with the model, the weather and how hard the compressor is working). Every wattage on the page is editable; the rating plate on the appliance beats anything here. Water pump rows are the motor's output (hp x 746 W); the electrical input is higher, so use the plate's input watts (amps x volts) where it gives them.

For houses in housing schemes, Annexure VI of the Consumer Service Manual assesses load by plot size for a double-storey house (ground plus one): a plot up to 75 square yards at 3.15 kW, above 75 up to 125 at 5 kW, and so on to 17.74 kW above 600 up to 1,000 square yards; a single-storey house is taken as half. The assessment is used where the ultimate load of a scheme is worked out for electrification. When an individual connection is given, the load declared on the application form is treated as the connected load, subject to the test report and DISCO’s verification, so read Annexure VI as a benchmark for the plot, and the appliance total on this page as the figure you would declare for your own house. Plot sizes in marla convert to square yards in the land area converter.

• Nameplate is a rating, not an average. The rating plate gives the rated power. An appliance that cycles or modulates, such as a refrigerator whose compressor switches on and off, draws less than that on average, so enter the hours it is actually drawing power, not the hours it is switched on.
• Inverter appliances modulate. An inverter compressor varies its speed, so it draws less than its maximum for most of the time; a non-inverter compressor switches fully on and off. The air conditioner rows here are typical running figures for each type, not maxima, so adjust hours or watts from your own unit's label, not both.
• Standby adds up. Devices left on all day still count. This page's router (10 W) and UPS or inverter standby (30 W) rows add up to 40 W, and 40 W for 24 hours is 40 x 24 x 30 / 1,000 = 28.8 units in a 30-day month. Enter any always-on device as a row with 24 hours.
• Units are not kVA. The manual defines power factor as the ratio of kWh to kVAh recorded in the month; a domestic bill is in kWh, the units this page estimates.

The share column shows which rows dominate your result. In most lists a few high-wattage, long-running appliances account for most of the units and many small devices for very little: in the example, one air conditioner is 57.7% of the month, and one hour less a day on it is 36 units, where a phone charger for 3 hours a day is 0.9.

Cross the result against your tariff

If your tariff moves you to a higher rate per unit at some monthly total, trimming your biggest consumer can be worth more than the units alone. This page does not know your tariff; enter your slab table in the electricity bill calculator to see where the boundaries fall, and the electricity bill tax calculator for the income tax on the bill.

Sizing solar from these figures

The daily units are the starting input, not the answer, and the rows you tick as running at once give the running load an inverter must carry; motors (air conditioners, pumps, refrigerators) draw several times their running watts for a moment at start-up, so an inverter needs headroom above that figure. The solar panel payback calculator works out generation, savings and payback; the net metering calculator settles the bill for units imported and exported.

Where this stops

This estimates units and compares ratings with a sanctioned figure you enter. What the units cost depends on your slab, your DISCO and the adjustments in that month, and whether an extension of load costs you anything depends on your tariff category; neither is worked out here.