Electrical Load Calculator

Every switch adds a watt: the lights overhead, the fans humming, the fridge that never stops, the AC compressor that starts hard, the geyser that eats kilowatts while it heats. Add the nameplates and you have the connected load - the number the wiring, the breaker and the utility connection must all be designed around.

Electrical Load Calculator adds up your appliance list - ACs, fans, lights, refrigerators, geysers, pumps, ovens, televisions and custom lines - into a connected load, then applies a demand factor to show the running load and the kVA you actually need to request. Power factor, diversity and unit counts are all in the model.

The result answers the practical question: how big a connection, in kW or kVA, does this home need? Run it before you sign the utility application, and keep it by the panel when the electrician sizes the main switch. Everything runs in the browser; nothing is uploaded.

• Dynamic appliance list: Add or remove rows for any appliance without losing the totals.
• Common presets: One-click wattage defaults for ACs, fans, lights, fridge, geyser, pump, oven, TV and more.
• Quantity and watts per line: Enter the count and the nameplate wattage, or pick a preset.
• Connected vs running load: The nameplate total and the demand-factor-adjusted number shown together.
• Power factor: Converts kW to the kVA the utility actually supplies.
• Unit scaling: Multiply a household load by the number of units / floors sharing a building connection.
• Suggestions: Compare the result against common sanctioned-load sizes and flag the closest.
• Live estimate: The load updates as you edit, with the formula visible.
• Export: Copy or download the load sheet as text, CSV or JSON.
• Learning guide: kW vs kVA, demand factors and how to read a nameplate.

1. Add appliances. Click add row, choose a preset or enter the name and wattage manually.
2. Set quantity for each - 3 ACs, not 1.
3. Correct the wattage from the nameplates where you have them.
4. Set the demand factor - 0.7 is a sensible household default.
5. Set the power factor (0.8-0.95, default 0.85).
6. Enter units if this is a multi-unit building connection.
7. Read the results. Connected kW, running kW, kVA and the closest sanctioned size.
8. Export the load list for the utility application.

Example 1 - Typical 2-BHK. 2 ACs (2,400 W), 6 fans (450 W), 15 LED lights (135 W), fridge 150 W, geyser 3,000 W, pump 750 W: connected load ~7-8 kW, running at 0.7 demand ~5.5 kW, kVA at 0.85 pf ~6.5 kVA - a 5 kW / 6 kVA class connection.

Example 2 - Bigger home. Adding an induction cooktop (2,000 W) and an oven (2,400 W) pushes connected load past 11 kW; running load still fits a 7 kVA connection with diversity.

Example 3 - Building scale. 6 flats at 4 kW each + common pumps and lifts: the unit-scaling input and a lower demand factor produce the society connection size.

Example 4 - Geyser check. One 3,000 W geyser is often 30-40% of a small home load when it runs - the calculator makes the share visible.

Example 5 - Sanction planning. A connected load of 8.5 kW with demand 0.65 lands near 6.5 kVA and matches a 6.6 kVA connection class.

• Apply with the right number: The sanctioned size you request matches the real demand, not a guess.
• Stop the tripping: A connection sized to connected load minus honest diversity stays inside the breaker.
• Plan the panel: The main switch and cable follow from the running kVA in the same table.
• Consistent for buildings: Unit-scaling and common-area lines cover a society as easily as a flat.
• Explainable math: Connected, demand and power-factor steps are visible line by line.
• Export-ready: Text, CSV and JSON load sheets drop into utility paperwork.
• Free and private: No uploads, no accounts, no logging.