Washing Machine Electricity Cost

Separate the washer’s electricity from water-heating energy

A washing machine uses electricity for its motor, pump, controls, and sometimes internal water heating. The energy needed to heat wash water may be supplied by a separate electric or fuel-fired water heater, so it may not appear in the washer’s nameplate power or a plug-in measurement. WattFigure’s editable appliance preset—500 watts, one hour, 12 use days per month, and a 60% duty cycle—models the washer itself. It does not automatically add household water-heating energy.

The calculation divides watts by 1,000, then multiplies by cycle hours, quantity, and duty-cycle fraction. At the preset values, a modeled use day is 0.5 × 1 × 0.60, or 0.3 kWh. If one use day represents one load, the days field can represent monthly load count. Multiple cycles on one laundry day can be represented by longer hours or quantity, provided the worksheet remains understandable.

Prefer standardized or complete-cycle data

An EnergyGuide label and ENERGY STAR product data can provide annual kWh under standardized assumptions. These values support model comparisons, while actual household results depend on cycle selection, load count, water temperature, load size, and washer design. Apply your own electric rate to the kWh figure rather than assuming the label’s estimated dollars match your utility.

Many standard-receptacle washers can be observed with a correctly rated plug-in energy meter, following all equipment instructions. Measure multiple complete cycles. A short reading can miss pump, spin, heating, or idle phases. Record the cycle, temperature selection, spin speed, and load. Never use a meter or adapter that is not rated for the appliance, and do not move connected equipment unsafely.

If using nameplate watts, remember that rated input may not be drawn throughout the cycle. Agitation, tumbling, draining, and high-speed spin create changing loads. The duty-cycle field provides a transparent simplification, while a complete-cycle kWh measurement naturally integrates those phases.

Cycle choices change both washer and dryer energy

Cold-water washing can reduce water-heating energy when suitable for the fabric and cleaning task. That saving may occur outside the washer row, especially when the home’s separate water heater supplies hot water. To estimate it, determine hot-water volume and temperature rise with reliable information, or compare whole-system measurements. Do not attribute all water-heating energy to the washer motor.

A higher final spin can leave less water in clothing and shorten electric dryer operation. That shifts the household comparison: a washer setting that uses slightly more spin electricity may reduce drying energy. Evaluate the washer and dryer together when drying is a major load. Fabric care, noise, vibration, and manufacturer instructions still govern appropriate settings.

Load size matters. Running many lightly loaded cycles can increase energy and water per garment, while overloading may reduce cleaning and stress equipment. High-efficiency models use different wash actions and water levels. Follow the manual rather than using an assumed “full” load definition.

Standby power is usually small compared with active cycles but can be included if a reliable measurement shows it matters. Create a separate row with low watts and 24 hours rather than disguising standby inside an active-cycle duty cycle.

Apply rates and compare fairly

WattFigure’s state selector uses a preliminary EIA residential average based on reported revenue divided by electricity sales. It is not an individual rate plan. Enter the applicable cents-per-kWh rate from your bill where possible. Fixed charges may not change with washer use, and time-of-use pricing may reward running flexible loads outside expensive periods.

For two washer models, compare annual kWh under the same load assumptions, but also review water use. A household with electric water heating may see a larger total effect from hot-water demand than the washer’s direct electricity. A household with another water-heating fuel needs a combined fuel and electricity comparison. Purchase price, capacity, cycle performance, accessibility, durability, and installation are separate considerations.

Avoid guaranteed-payback claims. Standard tests make products comparable, but household behavior is variable. Revisit the worksheet if laundry frequency, water-temperature habits, electric rate, or drying method changes.

Accuracy checklist

• Count complete cycles rather than connected hours.
• Use exact-model annual kWh or multi-cycle measurements.
• Keep external water-heating energy separate and clearly labeled.
• Consider the washer’s final spin when estimating dryer cost.
• Compare models using the same loads, cycles, and rate.
• Follow equipment, electrical, plumbing, and fabric-care instructions.

This page provides general information only. It is not electrical, plumbing, appliance-repair, fabric-care, or purchasing advice and does not guarantee costs or savings.

For a household comparison, count a representative mix of normal, delicate, bulky, and cleaning cycles. If their energy differs materially, calculate them separately. Combining complete labeled groups is more auditable than assigning every load the highest nameplate power for an arbitrary hour.