Model
Lg WT7155C*
Rank #357 means 356 of the 388 washing machine models we track cost less to run each year; the 17th efficiency percentile means it uses less energy for its size than 17% of those models.
What does the Lg WT7155C* cost to run per year?
At $37 a year to run, the Lg WT7155C* is among the more expensive washing machine models we track to run, ranking #357 of 388. Its 17th size-adjusted efficiency percentile is well below the class median, worth weighing against the raw cost figure above. The IMEF figure of 2.06 on this model captures integrated modified energy factor, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Whirlpool WTW8000D*+ at $36/yr runs a little cheaper and the Lg WT8405C* at $39/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A washing machine typically stays in service for somewhere around 10 years; over that span, the Lg WT7155C*'s $37/yr adds up to roughly $370 in electricity alone, before purchase price or repairs.
By the numbers
The Lg WT7155C* normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $37/yr, here is what the Lg WT7155C* adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Lg WT7155C* costs about $370. That is roughly $170 more than the class median, which would run closer to $200 over the same ten years.
How the Lg WT7155C* compares
The washing machine class we track runs from $7 to $58 a year. At $37/yr, it runs about $17 a year above the class median of $20, and it is about $30 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 4.8 cu ft, the Lg WT7155C* is a mid-size washing machine for its class, which spans 1.9 to 6 cu ft with a median of 4.5 cu ft, right in the middle of the capacity range, so capacity is roughly a wash compared with the rest of the class. The IMEF of 2.06 on this model, below the class median of 2.76, measures integrated modified energy factor; it is the number to compare directly against another model's IMEF if capacity is similar.
- Spin and wash efficiency (IMEF). A higher Integrated Modified Energy Factor means the machine wrings more useful washing (and a drier spin) out of every kilowatt-hour and gallon it uses.
- Drum volume. Drum volume sets the ceiling on how much a single cycle can wash, and it is usually the first driver of a washer's per-cycle energy use.
- Water heating. Cycle temperature, more than drum size, is usually what separates a cheap wash cycle from an expensive one on models with an internal water heater.
Common questions
Is the Lg WT7155C* cheap to run?
Not especially. At $37 a year it ranks #357 of 388 washing machine models we track, in the pricier part of its class to run, though its size and features may still justify that for your needs.
How much does the Lg WT7155C* cost per month?
Roughly $3.09/mo, spreading the $37/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 200 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $37 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg WT7155C* for its size?
17th percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 356 | Whirlpool WTW8000D*+5.3 cu ft | $36 |
| 355 | Midea MLH52N4AWW4.5 cu ft | $33 |
| 354 | Lg WT7050C*4.5 cu ft | $33 |
| 353 | Ge GTW540A*P***4.6 cu ft | $32 |
| 352 | Ge GTW538A*W***4.6 cu ft | $32 |
Source
ES_1118034_WT7155C*_02162022044730_80116696View certified washing machine listingsENERGY STAR data as of July 2026Lg and WT7155C* are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.