Model
Samsung WF45A64**A*
Rank #70 means 69 of the 388 washing machine models we track cost less to run each year; the 81st efficiency percentile means it uses less energy for its size than 81% of those models.
What does the Samsung WF45A64**A* cost to run per year?
Do the math and the Samsung WF45A64**A*'s $17/yr puts it at rank #70 of 388, one of the more affordable washing machine models we track to keep running. Adjusted for its imef, it is more efficient than 81% of washing machine models we track, a strong result once size is taken into account. Its IMEF of 3.1 reflects integrated modified energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Samsung WW25FG6B**** at $17/yr runs a little cheaper and the Samsung WF45B63**A* at $17/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 Samsung WF45A64**A*'s $17/yr adds up to roughly $170 in electricity alone, before purchase price or repairs.
Also sold as: Samsung WF45B63**A*.
By the numbers
The Samsung WF45A64**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 $17/yr, here is what the Samsung WF45A64**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 Samsung WF45A64**A* costs about $170. That is roughly $30 less than the class median, which would run closer to $200 over the same ten years.
How the Samsung WF45A64**A* compares
The washing machine class we track runs from $7 to $58 a year. At $17/yr, it runs about $3 a year cheaper than the class median of $20, and it is about $10 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 4.5 cu ft, the Samsung WF45A64**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, putting it squarely in the middle of the class on the size lever that drives most of the cost. The IMEF of 3.1 on this model, above 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 Samsung WF45A64**A* cheap to run?
Yes, relatively. At $17 a year it ranks #70 of 388 washing machine models we track, in the cheaper part of its class to run.
How much does the Samsung WF45A64**A* cost per month?
Roughly $1.44/mo, spreading the $17/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 93 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $17 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Samsung WF45A64**A* for its size?
81st percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 69 | Samsung WW25FG6B****2.5 cu ft | $17 |
| 68 | Samsung WW25FG5B****2.5 cu ft | $17 |
| 67 | Samsung WW25B69**A*2.5 cu ft | $17 |
| 66 | Samsung WW25B68**A*2.5 cu ft | $17 |
| 65 | Samsung WW22K680*A*2.2 cu ft | $17 |
Source
ES_1023593_WF45A64**A*_05312021112921_80084269View certified washing machine listingsENERGY STAR data as of July 2026Samsung and WF45A64**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.