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Electrical load schedule

Building Electrical Load Calculator

Add air conditioners, heaters, ovens, lighting, and other equipment to calculate connected load, demand load, expected current, and monthly energy.Start calculating
W / A / kWhPower and currentPDFStandalone reportSBC 401Method reference

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Enter your data and see the result immediately

Calculate connected load, demand load, current, and monthly energy for homes, shops, offices, or warehouses using an editable appliance schedule and PDF.

Calculator

Electrical load schedule

Home, shop, office, or warehouse
Calculation inputsResults update instantly
Load template
Supply system
Appliances and loads
Quick add
LoadQtyWattsHours/dayDemand factorDelete
Study resultTAYAR TK
Tayar TK
Preliminary engineering studyElectrical load schedule
Date: 2026-07-23Report reference: KWH-LOAD-2026

Site electrical load summary

Connected and diversified demand based on the entered demand factors.

Connected load9.04kW
Diversified demand7.38kW
Demand current35.65A
Estimated monthly energy1,189.2kWh
Preliminary main breaker40 A
Listed load types5
Calculation method

Demand = Σ(quantity × watts × demand factor); current follows the phase and power-factor equation.

Engineering notes
  • Demand factor estimates simultaneity; it does not reduce appliance or branch-circuit ratings.
  • Continuous and motor loads may require additional margins and starting-current analysis.
Safety approval

Do not use this estimate for installation before checking nameplate data, site conditions, short-circuit protection, and earthing.

kwh.tirtk.com.satirtk.com.saC.R 1009172880

This is a planning and comparison estimate. Final protection and conductor selection requires review by a licensed engineer or electrician, site-condition checks, manufacturer instructions, and the applicable code.

Calculation guide

Connected load versus demand load

Connected load is the sum of all equipment ratings. Demand load applies a factor to reflect realistic simultaneous operation. Demand factors must follow actual use and project requirements rather than arbitrary reduction.

The calculator converts demand power into single- or three-phase current using voltage and power factor, and estimates monthly energy from operating hours. Every row remains editable.

Create a preliminary load schedule

  1. Choose a home, shop, office, or warehouse preset.
  2. Edit quantity, watts, and daily hours.
  3. Review the demand factor for each load.
  4. Select phase, voltage, and power factor.
  5. Use resulting current as a starting point for cable and protection.

Loads needing special review

  • Motors, pumps, and starting current.
  • Air conditioners using nameplate electrical data.
  • Ovens, heaters, and long-duration loads.
  • Future expansion and spare capacity.
Method references
SBC 401IEC 60364-5-52

Frequently asked questions

Electrical load schedule frequently asked questions

How do I calculate a home's electrical load?

Add appliance, lighting, and AC ratings, apply justified demand factors, then calculate current from phase, voltage, and power factor.

Do operating hours reduce breaker size?

Hours determine energy consumption. Breaker sizing follows design current, load behavior, cable, and protection requirements.

Does AC tonnage equal electrical input?

No. Cooling tonnage is thermal capacity; use electrical watts or current from the nameplate.

Does this determine utility service size?

It provides a preliminary demand load. Service and meter sizing still require utility requirements and actual plans.