Model
Lg WM3800H*A
Rank #139 means 138 of the 388 washing machine models we track cost less to run each year; the 67th efficiency percentile means it uses less energy for its size than 67% of those models.
What does the Lg WM3800H*A cost to run per year?
Among the 388 washing machine models we track, the Lg WM3800H*A sits in the below-average-cost group, rank #139, at roughly $19 a year. Capacity-normalized, it ranks ahead of 67% of washing machine models we track, a reasonably strong result for the class. Its IMEF of 2.92 reflects integrated modified energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Lg WM3700H*A at $19/yr runs a little cheaper and the Lg WM3850H*A at $19/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 WM3800H*A's $19/yr adds up to roughly $190 in electricity alone, before purchase price or repairs.
Also sold as: Lg WM3580C*.
By the numbers
The Lg WM3800H*A 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 $19/yr, here is what the Lg WM3800H*A 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 WM3800H*A costs about $190. That is roughly $10 less than the class median, which would run closer to $200 over the same ten years.
How the Lg WM3800H*A compares
The washing machine class we track runs from $7 to $58 a year. At $19/yr, it runs about $1 a year cheaper than the class median of $20, and it is about $12 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 4.5 cu ft, the Lg WM3800H*A 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. Its IMEF of 2.92, above the class median of 2.76, reflects integrated modified energy factor: a higher figure means it wrings more useful work out of every kilowatt-hour, so it is the efficiency lever to weigh against raw size.
- Spin and wash efficiency (IMEF). IMEF is this class's core efficiency yardstick; two washers with the same drum size can carry meaningfully different IMEF figures and running costs.
- Drum volume. A larger-capacity washer can wash more per load, which can lower cost per pound of laundry, but it also draws more water and energy per cycle if you are not filling it.
- Water heating. Most washers rely on your home's hot water supply, but internal-heater sanitize or hot-wash cycles use meaningfully more electricity than a cold or warm wash.
Common questions
Is the Lg WM3800H*A cheap to run?
Yes. Its $19/yr running cost puts it at rank #139 of 388, below what most washing machine models we track cost to run.
How much does the Lg WM3800H*A cost per month?
About $1.62 a month, which is the $19 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 105 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $19 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Lg WM3800H*A for its size?
67th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 142 | Lg WM3700H*A4.5 cu ft | $19 |
| 141 | Lg WM3605H*A4.5 cu ft | $19 |
| 140 | Lg WM3600H*A4.5 cu ft | $19 |
| 139 | Lg WM3580C*4.5 cu ft | $19 |
| 138 | Lg WKHC202H*A4.5 cu ft | $19 |
Source
ES_1118034_WM3800H*A_04242019014737_80001963View certified washing machine listingsENERGY STAR data as of July 2026Lg and WM3800H*A 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.