Two hours of real housework is worth a few hundred calories — earned by the hours, not the effort#
Chores burn a genuinely useful number of calories, and almost none of it comes from intensity. When researchers strapped Douglas bags to 24 adults and measured oxygen uptake during self-paced domestic work, sweeping came out at 3.2 METs, window cleaning at 3.6 and mowing the lawn at 5.0. Vacuuming was the one activity whose mean failed to clear 3.0 METs at all1. For scale, moderate-paced walking in the same subjects measured 3.7 METs. Pushing a vacuum around is, energetically, less than a walk.
And yet a heavy domestic Saturday genuinely outburns a gym session, because you do two hours of it and nobody does two hours of anything at the gym. That is the whole mechanism: chores are cheap per minute and rich in minutes. It is the same arithmetic that makes a standing desk worthless — plenty of minutes, but at roughly 1.2 METs there is nothing to multiply — and it is why non-exercise activity is the largest movable term in most people's day.
What follows is the measured cost of specific tasks, the reason those costs are far less precise than any calculator implies, and an audit of the most-quoted claim in this area — which turns out to have been paid for by a soft-drink company.
Measured with a gas bag, chores sit right on the moderate-intensity line#
The threshold that matters in physical-activity research is 3.0 METs: below it an activity is "light," from 3 to 6 it is "moderate" and counts toward public-health targets. Household work does not sit comfortably on either side of that line. It sits on it.
Gunn's group measured 12 men and 12 women (mean age 39.3 ± 3.4 years, mean weight 81.0 ± 15.5 kg) on two separate days, and reported interday reproducibility of 0.81 to 0.97 with technical errors of 2.1 to 7.0 percent — this is careful work, not a survey. Their conclusion was that all the activities tested except vacuuming were performed at moderate intensity in conventional METs.
| Chore, self-paced | Mean MET (measured) | Gross kcal/hour at 70 kg | Net of resting |
|---|---|---|---|
| Vacuuming | below 3.0 | under ~210 | under ~140 |
| Sweeping | 3.2 | ~224 | ~154 |
| Window cleaning | 3.6 | ~252 | ~182 |
| Moderate-paced walking (reference) | 3.7 | ~259 | ~189 |
| Mowing the lawn | 5.0 | ~350 | ~280 |
Only the MET column is measured. The two right-hand columns are our arithmetic — one MET is about one kilocalorie per kilogram per hour, so a 70 kg body at 3.2 METs spends roughly 224 kcal an hour gross, of which about 70 was going to be spent lying on the sofa anyway. That resting deduction, and the reason the MET's own baseline is wrong for most people, is worked through in what walking actually costs; Gunn's team found the same thing from the other direction, reporting that dividing by the 3.5 mL·kg⁻¹·min⁻¹ convention significantly lowered every mean relative to using each subject's own measured resting rate.
The spread inside those means is the part worth carrying away. Expressed against measured resting metabolism, sweeping ranged from 2.9 to 6.7 across 24 people and vacuuming from 2.6 to 4.4. Five of the 24 fell below 3.0 for vacuuming; one did for sweeping. Same broom, same room, more than double the energy cost between two adults.
The same chore in your kitchen is not the same chore in a lab#
The second source of slop is stranger and better documented. Thirty-six women aged 35 to 45 swept, cleaned windows, vacuumed and mowed — each task performed twice, once in a standardized laboratory and once in their own homes. All four cleared 3.0 METs in both settings. But every single home-versus-laboratory comparison was statistically significant at P < 0.0012.
The same woman, the same task, a significantly different energy cost depending on the room. The authors attribute it to "environment and terrain" and the "mental approach to a task" — a lab is a flat floor and a stopwatch; your hallway has a rug, a corner and a reason to hurry.
Then they quantified how well any of this can be predicted. The 95 percent confidence intervals on their prediction equations came to ±1.1 METs at home and ±1.0 MET in the lab, against task means running from 3.1 to 6.0 METs. Their own verdict: the equations "lack predictive precision."
A ±1.1 MET band on a task whose mean is 3.1 METs is not error around a measurement. It spans from barely moving to briskly working — and every housework calculator online reports a single number inside it.
They also note the consequence for the public-health question: because between-subject variability is substantial, some people perform these chores at light intensity. Whether your vacuuming counts as moderate activity is not a fact about vacuuming.
What a heavy domestic day actually tallies#
So put the numbers to work on a real Saturday. Using the net column above for a 70 kg adult — our arithmetic on Gunn's measured METs:
- 30 minutes vacuuming: ~70 kcal
- 30 minutes sweeping: ~77 kcal
- 30 minutes cleaning windows: ~91 kcal
- 45 minutes mowing: ~210 kcal
That is two and a quarter hours of continuous work for roughly 450 net calories. It is a real number, comparable to a long run, and it is available to people who will never go for a long run. It is also conditional on the words two and a quarter hours of continuous work, which is not what most housework days look like. Halve the time and you halve the total; substitute an hour of tidying for the mowing and it collapses.
Notice which lever did the work. Mowing supplied nearly half the total from a third of the time, because it is the one task in the set with a genuinely moderate intensity. Everything else earned its calories by lasting.
The 360-calorie claim, and who paid for it#
The most-repeated statistic in this area comes from a 2013 analysis of United States national time-use data. Women aged 19 to 64 cut their household management — food preparation, post-meal cleanup, clothing maintenance, general housework — from 25.7 hours a week in 1965 to 13.3 in 2010. Converted to energy, non-employed women's household expenditure fell 42 percent, from 6,004 to 3,486 kcal a week: a decrement of 360 kcal a day. For employed women the fall was 132 kcal a day. Screen-based media use roughly doubled, from 8.3 to 16.5 hours a week3.
The paper's funding statement reads, verbatim: "This study was funded via an unrestricted research grant from The Coca-Cola Company." The competing-interests statement discloses that one author had received consultancy fees from the same company. Both declarations state the funder had no role in design, analysis or publication, and that is the standard and probably accurate assurance. It is also worth saying plainly what the finding does: it locates the cause of population weight gain in declining activity rather than in what people drink and eat, which is the conclusion that particular funder spent the 2010s paying for.
That is not a reason to bin the result — the time-use data come from federal surveys and can be checked by anyone. It is a reason to separate the paper's two claims, which are not equally solid. Women spending roughly half as many hours on housework as their grandmothers is a robust, verifiable measurement. Turning those hours into 360 calories a day requires assigning a MET value to each one, and the two studies above put a ±1.1 MET confidence band on exactly these tasks. The hours are a finding. The calories are a model built on an instrument that cannot resolve to better than a third of its own value.
The number is probably already in your budget#
One practical consequence, and it is the opposite of what these articles usually recommend.
If you estimated your daily burn by taking a resting rate and multiplying it by an activity factor — the method in how to calculate TDEE — your chores are already in there. That is what the multiplier is for: it prices your ordinary week, laundry and stairs and shopping included, which is precisely why choosing the right one is harder than choosing an adjective. Logging Saturday's cleaning as a 450-calorie workout on top of that multiplier counts it twice, and the second count is the one you will eat back.
The useful move is the boring one. Do not credit housework; just do more of the versions with a real intensity attached — the mowing, the scrubbing, the walk to the shop instead of the drive — and leave the ledger alone. Chores are one of the few pieces of movement that survive a busy life without a decision being made, which is what makes them worth more than their MET values suggest, and the habits that last tend to look like that rather than like a workout plan.
FAQ#
How many calories does an hour of housework burn?#
Roughly 140 to 280 net calories for a 70 kg adult, depending heavily on the task. From measured MET values: vacuuming under about 140, sweeping about 154, window cleaning about 182, mowing the lawn about 280 — our arithmetic on gas-analysis data, after subtracting the resting energy you would have spent anyway. Expect the real figure for any individual to sit well inside a ±1 MET band around those.
Do chores count toward the recommended 30 minutes of moderate activity?#
For most people, most tasks, yes — but not all people and not all tasks. Sweeping, window cleaning and mowing all measured above the 3.0 MET moderate-intensity threshold. Vacuuming's mean did not clear it in one study of 24 adults, and five of those 24 fell below the threshold on it. Because between-person variability is substantial, the same chore is moderate activity for one person and light activity for another.
Should I log housework as exercise in a calorie tracker?#
Usually not, because you have probably already counted it. Activity multipliers in TDEE formulas are designed to include ordinary daily movement — cooking, cleaning, errands — so adding a cleaning session as a separate workout double-counts it. The exception is a genuinely unusual day: several hours of yard work or a house move is a real few hundred calories that your normal multiplier never anticipated.
Sources#
- Gunn SM, Brooks AG, Withers RT, Gore CJ, Owen N, Booth ML, Bauman AE. Determining energy expenditure during some household and garden tasks. Med Sci Sports Exerc. 2002;34(5):895-902.
- Brooks AG, Withers RT, Gore CJ, Vogler AJ, Plummer J, Cormack J. Measurement and prediction of METs during household activities in 35- to 45-year-old females. Eur J Appl Physiol. 2004;91(5-6):638-648.
- Archer E, Shook RP, Thomas DM, et al. 45-year trends in women's use of time and household management energy expenditure. PLoS One. 2013;8(2):e56620.
- Gunn SM, van der Ploeg GE, Withers RT, Gore CJ, Owen N, Bauman AE, Cormack J. Measurement and prediction of energy expenditure in males during household and garden tasks. Eur J Appl Physiol. 2004;91(1):61-70.
