Women sleep more than men by about 11 minutes per night. That gap comes from a nationally representative analysis of over 100,000 working-age adults in the American Time Use Survey, which found women averaged 508 minutes of sleep per diary day compared to 496 minutes for men. While 11 minutes sounds small, it adds up to more than an hour per week, and the reasons behind it reveal genuinely different biological and social realities around sleep for each sex.
How Much More Do Women Sleep?
The 11-minute nightly difference is a population average, meaning individual variation is enormous. Some men sleep far more than some women, and vice versa. But across large groups, the pattern is consistent: women log slightly more total sleep time. This holds up whether researchers use time-use diaries, wrist-worn activity trackers, or self-reported questionnaires.
What makes this tricky to interpret is that sleeping more doesn’t necessarily mean sleeping better. Women are 1.3 to 2 times more likely than men to develop insomnia. So the extra minutes women spend in bed may partly reflect a greater need for sleep, but they may also reflect more time lying awake trying to fall back asleep, or compensating for poorer sleep quality with longer time in bed.
Why Women May Need More Sleep
One biological explanation involves the body’s internal clock. The intrinsic circadian period, the natural length of your internal day if you had no external time cues, runs slightly shorter in women than in men. Women’s internal clocks average 24 hours and 5 minutes, while men’s average 24 hours and 11 minutes. About 35% of women have an internal clock that runs shorter than 24 hours, compared to just 14% of men.
This shorter clock means women’s bodies tend to shift toward earlier sleep and wake times. It also means their sleep pressure, the biological urge to sleep, may build and peak on a slightly different schedule. Researchers believe this contributes to women feeling sleepier earlier in the evening and waking earlier in the morning, potentially explaining why women tend to spend more total time in bed.
Hormones also play a direct role. Estrogen and progesterone influence several brain systems that control the switch between sleep and wakefulness. These hormones affect how the brain produces sleep-promoting chemicals and how strongly arousal signals fire. The result is that women’s sleep patterns shift noticeably across the menstrual cycle, during pregnancy, and through menopause, in ways that have no parallel in men.
Deep Sleep Declines Faster in Men
Sleep isn’t just about duration. The type of sleep you get matters too, and here men face an earlier disadvantage. In their twenties, men and women spend similar percentages of the night in deep sleep (the restorative stage that helps with physical recovery and memory). But during their thirties, men experience a significant drop in deep sleep that women don’t. Women maintain their deep sleep percentages longer into adulthood.
This means that even though men may spend fewer total minutes asleep, the quality of their sleep also deteriorates earlier. The combination of less time asleep and earlier loss of deep sleep may help explain why men tend to report less daytime sleepiness despite objectively getting less restorative rest. They may simply be less aware of the deficit.
Parenthood Widens the Gap
One of the clearest moments when the sleep gap between men and women grows is after having a child. From pregnancy through the postpartum period, mothers lose an average of 41 minutes of nighttime sleep. Fathers lose about 16 minutes. That’s a difference of roughly 25 minutes per night during a period that can stretch for months.
This gap reflects both biology and social roles. Breastfeeding mothers are tied to their infant’s feeding schedule in a way fathers are not. But even in formula-feeding households, mothers tend to take on more of the nighttime caregiving, which fragments their sleep into shorter stretches. Fragmented sleep is less restorative than continuous sleep, even when the total hours are similar.
Menopause Creates a New Wave of Sleep Problems
For women, the sleep landscape shifts again during midlife. Between 40% and 56% of women going through perimenopause and menopause report significant sleep difficulties, compared to about 31% of women in their late reproductive years who haven’t yet begun the transition. About 26% of perimenopausal women meet the clinical criteria for insomnia, with difficulty staying asleep being the most common complaint.
The hormonal changes driving this are substantial. As estrogen and progesterone levels drop, the brain systems that regulate sleep lose a key input signal. Hot flashes and night sweats, which affect a majority of menopausal women, directly disrupt sleep by causing repeated awakenings. This is a period when women’s subjective sleep quality often plummets even if their total time in bed doesn’t change much.
Sleep Apnea Favors Men, Until It Doesn’t
While women deal with higher rates of insomnia, men are far more likely to have obstructive sleep apnea, a condition where the airway repeatedly collapses during sleep. Among young and middle-aged adults, 24% of men show some degree of sleep-disordered breathing compared to 9% of women. In clinical settings where people seek treatment, men outnumber women by ratios as high as 8 to 1 or even 10 to 1.
Sleep apnea causes repeated micro-awakenings throughout the night that the sleeper often doesn’t remember. This means many men who think they’re sleeping a full night are actually getting heavily disrupted rest. The condition contributes to daytime fatigue, high blood pressure, and cardiovascular risk, and it’s significantly underdiagnosed.
The gender gap in sleep apnea narrows after menopause. Postmenopausal women who aren’t on hormone replacement therapy have roughly four times the risk of sleep apnea compared to premenopausal women. Among older adults, 70% of men and 56% of women show some degree of disordered breathing during sleep. The protective effect of estrogen and progesterone on airway muscle tone appears to be a major reason younger women are relatively spared.
The Bottom Line on the Gap
Women sleep about 11 more minutes per night than men across the population. But that extra time comes alongside higher rates of insomnia, more sleep disruption during key life stages like pregnancy and menopause, and hormonal fluctuations that make sleep quality less stable from week to week. Men sleep less in total but face earlier declines in deep sleep quality and dramatically higher rates of sleep apnea, a condition that silently erodes the sleep they do get. Both sexes face distinct sleep challenges, and the simple question of “who sleeps more” only captures a small piece of a much more complicated picture.