Washing Machine Energy Cost Calculator
A standard 500W front-loader costs about $0.15 a load on a warm wash at the 2024 US average of $0.16/kWh — $0.07 in cold water, $0.24 in hot. At 5 loads a week that is $39 a year, or $17 if you wash cold. The calculator opens on exactly that machine: 500W, 1 hour of washing a day, full drum, warm wash. An hour a day is 8.4 loads a week at a 50-minute cycle, so turn the hours down if you do less laundry than that — and change the temperature, the load size, the machine or your state to see every figure follow.
Wash temperature
Load size
Warm wash, cost per load
$0.15
0.93 kWh a load at $0.16/kWh — at 8.4 loads a week that is $5.43 a month and $65 a year (407 kWh).
Drum motor
$0.07
0.42 kWh — the washer itself
Heating the water
$0.08
0.51 kWh — 6.0 gal to 90°F
Per year
$65
8.4 loads a week
500 W ÷ 1,000 × the 50-minute cycle = 0.42 kWh of motor, plus 6.0 gallons lifted from 55°F to 90°F = 0.51 kWh of water heating. That is 0.93 kWh × $0.16 = $0.15 a load. An hour of washing a day works out to 8.4 loads a week; the average US household does 5 — set hours per day to 0.60 for that.
Same load in cold water: $0.07
The motor turns the drum either way. Dropping the temperature saves $36 a year at this rate and this much laundry.
With a gas water heater: $0.10
Same heat, bought by the therm at $1.50 with 80% of it reaching the water. Only the motor stays on your electricity bill.
Wattage is the plate figure for the wash — the spin peaks higher for a minute or two and the soak draws nothing, so over a full cycle the plate is close enough. The fill volume is the number that decides the bill, and it comes from the machine you pick: 4 gallons on a compact front-loader, 15 on a pre-2011 agitator. Water heating assumes a 55°F inlet and a tank set to 130°F; turn the tank down and every warm and hot figure here falls with it. Not sure of your rate? Check average rates by state.
Want the cost for a different appliance or your exact utility rate? Use the appliance cost calculator, or compare laundry against the rest of the house on the efficiency rankings.
The Formula
Cost per load = (motor kWh + water-heating kWh) × price per kWh
A washing machine bills you twice and only one of the charges is on the machine. The drum motor is fixed: 500W for a 50-minute cycle is 0.42 kWh, and no temperature dial changes it. The water heater is where the variance lives, and it is pure arithmetic — a gallon weighs 8.34 lb, a BTU raises a pound of it one degree, and a kWh is 3,412 BTU. Nothing in that sum depends on the washer except how many gallons it fills with.
Worked example (500W front-loader, full drum, warm wash, $0.16/kWh): 0.42 kWh motor + 6 gallons lifted from 55°F to 90°F (0.51 kWh) = 0.93 kWh × $0.16 = $0.15 per load. That warm fill is 2.8 gallons off the hot tap and the rest cold, which is what a mixing valve is doing when you turn the dial.
Cost Per Load by Wash Temperature and Load Size
For the 500W front-loader at $0.16/kWh with an electric water heater. Read across for the temperature dial and down for how full the drum is. The dial is the bigger of the two: cold to hot on a full drum is a $0.18 swing, where a full drum down to a quarter drum on a hot wash is only $0.06. Every row carries the same 0.42 kWh of motor, so the cold column is flat.
| Load size | Wash fill | Cold (55°F) | Warm (90°F) | Hot (130°F) | Warm · 5/wk · year |
|---|---|---|---|---|---|
| Small (quarter drum) | 4.0 gal | $0.070.42 kWh | $0.120.76 kWh | $0.181.15 kWh | $31 |
| Medium (half drum) | 4.7 gal | $0.070.42 kWh | $0.130.81 kWh | $0.201.27 kWh | $34 |
| Large (three-quarters) | 5.3 gal | $0.070.42 kWh | $0.140.87 kWh | $0.221.39 kWh | $36 |
| Full drum (rated) | 6.0 gal | $0.070.42 kWh | $0.150.93 kWh | $0.241.52 kWh | $39 |
A half load is not half a wash. An auto-sensing machine weighs the load and fills to suit, but it has a floor — the drum has to be wetted and the recirculation pump kept fed — so the fill never drops below about 55% of a full one, and the motor runs its whole cycle regardless. Two half loads therefore cost 1.8× what one full load costs, not 1× and not 2×. On an older machine with a manual water-level dial there is no floor and no ceiling: left on “large” it fills to large for three socks.
Cost Per Load by Washing Machine Type
Full drum, at $0.16/kWh. Read the wash-fill column against the wattage column: the motors are within 150W of each other and the machines are three times apart on a hot wash. What you are buying with a front-loader is a smaller bath, not a smaller motor.
| Machine | Plate · cycle | Wash fill | Water per cycle | Cold | Warm | Hot | Warm · year |
|---|---|---|---|---|---|---|---|
| Compact 120V front-load24-inch apartment machine. Smallest drum, smallest fill, longest cycle. | 350 W · 60 min | 4 gal | 8 gal | $0.06 | $0.11 | $0.17 | $29 |
| Standard front-load (HE)Tumbles through a shallow bath instead of filling the drum. The cheap one. | 500 W · 50 min | 6 gal | 13 gal | $0.07 | $0.15 | $0.24 | $39 |
| HE top-load (impeller)No centre post, low fill, but it still has to float the load. | 500 W · 55 min | 9 gal | 19 gal | $0.07 | $0.20 | $0.34 | $51 |
| Agitator top-load (pre-2011)Fills the drum to swim the clothes past a post. Fast cycle, expensive water. | 500 W · 45 min | 15 gal | 35 gal | $0.06 | $0.27 | $0.50 | $69 |
Annual figures are 5loads a week. The bottom row is where this site's long-quoted 0.4 / 1.7 / 3.1 kWh figures for a cold, warm and hot wash come from — they were always a 15-gallon agitator's, and they still are. A modern front-loader is less than half of that because it fills with less than half the water.
Yearly Cost by How Much Laundry You Do
The 500W front-loader, full drum, at $0.16/kWh. The average US household runs about 5 loads a week. Note that the cold column at 10 loads a week still costs less than the hot column at 3 — the dial beats the habit.
| Loads per week | kWh per year | Cold· year | Warm· year | Hot· year | Warm · month |
|---|---|---|---|---|---|
| 3 | 145 | $10 | $23 | $38 | $1.93 |
| 5 (typical household) | 242 | $17 | $39 | $63 | $3.22 |
| 7 | 339 | $24 | $54 | $88 | $4.51 |
| 10 | 484 | $35 | $77 | $126 | $6.45 |
Cost Per Load by Electricity Rate
The same front-loader, the same full drum, five common US rates. Cheap power makes a hot wash affordable; expensive power makes cold washing worth real money.
| Rate ($/kWh) | Cold wash | Warm wash | Hot wash | Warm · 5/wk · year | Cold saves/year |
|---|---|---|---|---|---|
| $0.10 | $0.04 | $0.09 | $0.15 | $24 | $13 |
| $0.13 | $0.05 | $0.12 | $0.20 | $31 | $17 |
| $0.16 (US average) | $0.07 | $0.15 | $0.24 | $39 | $21 |
| $0.20 | $0.08 | $0.19 | $0.30 | $48 | $27 |
| $0.30 | $0.13 | $0.28 | $0.45 | $73 | $40 |
All of the above assumes an electric water heater. On gas, the heat for a warm load costs about $0.03 instead of $0.08 at $1.50/therm, so the whole warm-versus-cold question shrinks to a few cents a load and only the motor stays on your power bill.
Cost by U.S. Region
Laundry is one of the few appliances whose bill is set almost entirely by where you live, because the wash itself is identical everywhere. The same 5-loads-a-week warm-wash habit on the same front-loader costs $24 a year in Idaho and $94 in Hawaii — 3.8× the money for the same clean clothes.
| Region | Average rate | Warm · load | Hot · load | Warm · 5/wk · year | Cheapest / dearest state |
|---|---|---|---|---|---|
| Northeast9 states · Every state in it is above the national average | $0.236 | $0.22 | $0.36 | $57 | Pennsylvania $0.17 / Connecticut $0.29 |
| Midwest12 states · Clustered close to the national average, high and low | $0.142 | $0.13 | $0.21 | $34 | North Dakota $0.12 / Michigan $0.18 |
| South17 states · The cheapest on average, and the tightest spread of the four | $0.131 | $0.12 | $0.20 | $32 | Arkansas $0.11 / Maryland $0.16 |
| West13 states · The widest spread of any region: cheap hydro next door to California and Hawaii | $0.166 | $0.15 | $0.25 | $40 | Idaho $0.10 / Hawaii $0.39 |
Regions are the US Census Bureau's four, and the rate shown is an unweighted average of the states in each — every state counts once, however many people live there. That makes the West row misleading on its own: it runs from Idaho at $0.10 to Hawaii at $0.39, a 3.8-fold spread inside one region. Use your own state's figure from electricity rates by state — or pick it in the calculator above — and treat the region as context for how far your neighbours are from you.
The Washer Is the Cheap Half of the Laundry Room
Every figure below is for the same 10 lb load, taken from the model on each of those pages.
Drying that load costs 2.4× washing it
A standard vented electric dryer uses about 2.25 kWh to evaporate the water a front-loader leaves behind — $0.36 a load against $0.15 for the warm wash that produced it, and 5× a cold wash. If you are trying to cut the laundry bill and you have already moved the temperature dial, the next dollar is in the dryer, not the washer. See cost to run a dryer for heat pump, vented and gas figures.
A fast spin is the washer buying down the dryer's bill
The spin cycle is the only part of a wash that saves money on a different appliance. A 1,200 RPM front-loader hands the dryer a load holding about half its dry weight in water; a 700 RPM agitator hands over noticeably more, which costs $0.50 to dry instead of $0.36 — $37 a year at 5 loads a week. That penalty is larger than the entire difference in their cold-wash running costs.
An all-in-one combo washes the same, then dries for more
A washer-dryer combo does the wash phase in the same water at the same cost — it is the drying half where the numbers change, because a ventless condenser on a 120V outlet removes less water per kWh than a vented dryer does and takes hours to do it. Worth reading before you buy one: cost to run a washer-dryer combo.
What Drives the Cost
The water heater, not the washer
On a hot wash, 73% of the electricity is water heating on a front-loader and 88% on an old agitator. The motor is the same 0.42 kWh whatever the dial says. That single fact is why the temperature setting moves the bill further than the machine, the load size and your habits combined — and why a gas water heater takes most of the question off the table.
Fill volume, which is what “HE” actually means
A front-loader tumbles clothes through a shallow bath of about 6 gallons; an agitator machine has to float them past a post, which takes 15. Over a whole cycle including rinses that is 13 gallons against 35 — roughly 5,720 gallons a year of difference at 5 loads a week, on the water bill as well as the power bill.
Tank temperature, which you control
Every hot figure on this page assumes a tank at 130°F against a 55°F inlet. The Department of Energy recommends 120°F, and at that setting a hot wash on this front-loader costs $0.22 instead of $0.24 — and every other hot-water draw in the house falls with it. See cost to run a water heater.
Energy Star certification
Energy Star washers use at least 25% less energy and 33% less water than the federal minimum. The label is most meaningful on top-load machines, where the spread between models is still wide, and against anything older than ten years, where the standards have tightened repeatedly. Between two current front-loaders the gap is small — they have all converged on roughly the same fill.
How to Lower the Cost
Wash cold — $21 a year
The biggest lever by a distance, and it is free. Moving from warm to cold at 5 loads a week saves $21; from hot to cold, $46. Modern detergents are built to dissolve at 60°F.
Fill the drum before you run it
Two half loads cost 1.8× one full load, because the fill has a floor and the motor runs its full cycle either way. Waiting until the drum is three-quarters full is the second-cheapest change on this list.
Turn the water heater down to 120°F
It lowers every warm and hot wash on this page and everything else the tank feeds. Don't go below 120°F on a storage tank — that is the floor for keeping Legionella out.
Use the fastest spin the fabric allows
Water spun out costs almost nothing; water evaporated in the dryer costs $0.36 a load. See the old-vs-new break-even guide if you are weighing a replacement.
Recommended picks
Ways to Cut Your Laundry Bill
Because water heating is 73% of a hot load and the motor is the rest, the highest-return changes are the ones that let you wash cold or fill with less water. Neither one needs a new machine.
Energy Star Front-Load Washer
Most efficient design
A front-loader fills with about 6 gallons where a pre-2011 agitator fills with 15, and the wash water is the whole bill on anything warmer than cold.
Cold-Water Laundry Detergent
Make cold washes work
Detergents formulated for cold water clean as well in 60°F as a hot wash in 130°F. Washing cold skips the water heating entirely, and on a hot load that is most of the bill.
Smart Plug Energy Monitor
Measure actual draw
A plug-in energy meter reads the drum motor directly — the half of the load this page can only estimate from the plate. The water heater's share stays on its own circuit.
Washing Machine Cleaner Tablets
Keep the drum efficient
A clogged or dirty drum forces longer cycles. A monthly cleaning tablet keeps the machine spinning at full efficiency and avoids re-wash loads.
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Related Guides
Cost to Run a Dryer
$0.36 to dry the load you just washed for $0.15
Cost to Run a Washer-Dryer Combo
Why one drum costs more to run than two, unless it has a heat pump
Cost to Run a Clothes Iron
The cheapest appliance the load passes through — cost per hour and per shirt
Cost to Run an Electric Water Heater
The appliance that bills you for 73% of a hot wash
Cost to Run a Dishwasher
Per-cycle cost by type and rate
Cost to Run a Refrigerator
Annual kWh and cost by fridge type, age, and rate
Most Efficient Appliances
See which appliances cost the most to run
Electricity Rates by State
$0.10 in Idaho to $0.39 in Hawaii
How to Save on Energy Bills
Practical tips by room with savings
Energy Star Guide
Is upgrading worth the cost?
Frequently Asked Questions
How much does it cost to run a washing machine per load?
About $0.15 a load for a standard 500W front-loader on a warm wash, at the US average of $0.16/kWh. The same machine costs $0.07 in cold water and $0.24 in hot. The drum motor is only $0.07 of that — 0.42 kWh over a 50-minute cycle — and everything above it is your water heater raising the 6 gallons the machine fills with. At 5 loads a week that works out to $39 a year warm, $17 cold, $63 hot.
Does washing with cold water actually save money?
Yes — it is the biggest single lever on the page. On a hot wash, 73% of the electricity goes to heating water on a front-loader and 88% on an old agitator top-loader, and cold fill skips all of it. Switching a hot load to cold takes it from $0.24 to $0.07 — $46 a year at 5 loads a week. Modern cold-water detergents are formulated to dissolve and clean at 60°F, so for everyday loads there is no cleaning trade-off.
Does load size change what a wash costs?
Less than you would think, and that is the problem. An auto-sensing machine fills to suit the load but it has a floor — the drum has to be wetted and the pump kept fed — so a half load still uses about 78% of a full load's water, and the motor runs the same cycle either way. A half load on a front-loader costs $0.13 warm against $0.15 for a full one. Run two half loads instead of one full load and you pay 1.8x — not double, but nowhere near half.
Are front-load washers cheaper to run than top-load?
Yes, and the reason is the fill, not the motor. A front-loader tumbles clothes through about 6 gallons where a pre-2011 agitator fills with 15, so a hot wash costs $0.24 against $0.50 — $67 a year apart at 5 loads a week. Front-loaders also spin at 1,200 RPM against 700, so clothes leave drier and the dryer has less water to evaporate: about $0.14 less per load, or $37 a year.
How much does water heating add to the cost?
On a hot wash it is 73-88% of the total, depending on how much water the machine fills with. Heating is simple arithmetic: a gallon of water weighs 8.34 lb, raising a pound of it one degree takes one BTU, and there are 3,412 BTU in a kWh. So lifting 6 gallons from 55°F to 130°F takes 1.10 kWh — more than double the 0.42 kWh the washer itself uses. If your water heater runs on gas that same heat costs about $0.07 instead of $0.18, which is why the hot-wash premium barely registers on a gas house.
Should I replace an old washing machine to save on electricity?
On electricity alone, rarely — the gap is real but small in absolute terms. A pre-2011 agitator costs $0.27 a warm load against $0.15 for a front-loader, about $30 a year at 5 loads a week, plus roughly $37 of dryer energy the slower spin hands downstream. Against a $700-$1,200 machine that is a long payback. The stronger arguments are water (35 gallons a cycle against 13, which is 5,720 gallons a year) and the fact that a 15-year-old machine is near the end of its life anyway.
Does the wattage on the sticker tell me the real cost?
Only for the drum. The plate figure and the cycle length do multiply out honestly on a washer — the spin peaks above the plate for a minute or two and the soak draws nothing, and those errors roughly cancel — but that gets you 0.42 kWh, which on a hot wash is under a third of the bill. The rest is metered on a different appliance entirely. If you want one number that bundles everything, the yellow EnergyGuide sticker's annual kWh estimate includes the water heating at the test temperature.