An untrained woman in her twenties or thirties can typically lift somewhere between 20 and 50 kg (roughly 45 to 110 pounds) in a single maximal effort on major barbell movements like the squat or deadlift, with substantially less on upper-body lifts like the bench press. Those numbers shift enormously depending on the exercise, the woman’s body weight, her training history, and even what time of the month it is. The short figure people often throw around for everyday safe lifting is closer to 15 kg (about 33 pounds) for repetitive tasks, but that workplace guideline and a true one-rep max are measuring very different things.
How Women’s Strength Compares in Absolute and Relative Terms
When researchers compare men and women on raw lifting numbers, the gap is real but not as uniform as people assume. A study of university students found that women’s strength corresponded to over 50 percent of men’s, while their lean mass was about 55 percent of men’s.1PubMed Central. Sex differences in upper and lower strength and their association with body composition among university students That means muscle-for-muscle, women are nearly as strong as men, and the absolute gap is driven largely by how much muscle each person carries.
Research on trained athletes reinforces this. When squat and deadlift performance was adjusted for lean body mass, no significant difference between men and women remained. The gap persisted only in upper-body pressing movements like the bench press.2PubMed Central. A Comparison between Male and Female Athletes in Relative Strength and Power Performances A separate analysis of youth weightlifters confirmed that adjusting for fat-free mass reduced but did not fully erase the sex difference, pointing to additional factors like neuromuscular activation and muscle architecture.3PubMed Central. Are Sex Differences in Youth Weightlifting Performance Explained by Fat-Free Mass? A Controlled Analysis The practical takeaway is that most of what separates the “average” woman from the “average” man in a gym is total muscle mass, not some fundamental weakness in the muscle tissue itself.
Upper Body Versus Lower Body
The strength gap between sexes is not evenly distributed across the body. It is concentrated in the upper body, and this matters for real-world lifting estimates. A study comparing untrained men and women found that the sex difference in muscle cross-sectional area was much larger in the upper arm than in the thigh. When the researchers measured force per unit of muscle cross-sectional area in the elbow flexors and extensors, there was no significant difference between sexes.4PubMed. Comparison of muscle cross-sectional area and strength between untrained women and men
This is why an untrained woman’s deadlift or squat will tend to be a much larger number than her bench press, proportionally more so than for a man. A woman who has never trained might deadlift 40 kg on her first day in a gym but struggle to bench press 20 kg. For men, the deadlift-to-bench ratio is typically narrower. The upper-body gap is the single biggest reason that blanket statements about “how much a woman can lift” are misleading without specifying the movement.
Grip Strength as a Practical Yardstick
Grip strength is one of the most commonly measured proxies for overall strength, partly because it is easy to test and surprisingly predictive of broader physical capacity. A large U.S. reference study reported that mean grip strength for women ranged from a peak in the mid-twenties down to about 18.7 kg for the nondominant hand of women aged 75 to 79.5PubMed. Hand-Grip Strength: Normative Reference Values and Equations for Individuals 18 to 85 Years of Age Residing in the United States A population-based study found that once you know a person’s age and sex, you can predict their grip strength reasonably well, because the variation within each group is small.6PubMed Central. Hand Grip Strength: age and gender stratified normative data in a population-based study
What makes grip strength interesting for everyday lifting is that your hands are often the limiting factor. You might have the leg and back strength to lift a heavy box, but if your grip gives out, the object drops. For the average woman in her twenties, dominant-hand grip strength sits in the neighborhood of 30 to 35 kg. That sets a practical ceiling on things like carrying groceries, hefting luggage, and holding children for extended periods. Grip strength also peaks between age 20 and 30 for women, with some evidence that Asian women uniquely maintain peak grip into their forties.7PubMed Central. Absolute and Body Mass Index Normalized Handgrip Strength Percentiles by Gender, Ethnicity, and Hand Dominance in Americans After 30, the decline is gradual at first and then accelerates past 60.
What Ergonomic Research Says About Everyday Lifting
The question people are often really asking is not “what is the absolute maximum a woman can hoist off the ground once?” but rather “how much can she safely lift and carry as part of daily life or work?” These are fundamentally different questions, and the ergonomic literature gives much more conservative numbers.
A study on female construction and household workers estimated the maximum acceptable weight of lift (MAWL) at around 15 kg for repetitive tasks. The researchers noted that existing factory regulations in the same region set the limit at 30 kg, which was double the value their data supported as safe.8International Journal of Industrial Ergonomics. Determination of maximum acceptable weight of lift by adult Indian female workers This 15 kg figure crops up across multiple studies and roughly aligns with workplace guidelines in many countries.
Even within that range, how you lift matters enormously. When female participants were asked to lift loads at various angles of rotation away from straight ahead, the acceptable weight dropped by about 5 percent at a slight twist, 9 percent at a moderate twist, and 14 percent at a full sideways turn.9PubMed. Maximum acceptable weights for asymmetric lifting of Chinese females That means the same woman who can comfortably lift 15 kg from a box directly in front of her should probably limit herself to around 13 kg if she has to twist while doing it. The shape and size of the object also matter: research on one-handed carrying found that the shape of the container significantly influenced how much weight people were willing to carry, and that acceptable loads decreased with carrying distance.10PubMed Central. Subjective estimates of one-handed carrying tasks
How Body Size Scales With Strength
One of the more interesting findings in the strength science literature is how predictably lifting capacity scales with body size. An analysis of world weightlifting champions found that the weight lifted varied almost exactly with height squared. The study also found that the ratio of weight lifted to body cross-sectional area stayed roughly constant up to about 64 kg of body weight for women, then fell off sharply in heavier weight classes.11PubMed. Gender- and height-related limits of muscle strength in world weightlifting champions In other words, lighter female lifters tend to devote a nearly constant fraction of their body mass to muscle, but as body weight climbs, additional weight increasingly comes from non-contractile tissue. The same analysis estimated that contractile tissue makes up about 30 percent less of body mass in female champions compared to male champions.
For the average woman, this scaling relationship means that a taller, heavier woman will typically lift more in absolute terms, but not proportionally more. A 70 kg woman does not lift twice what a 50 kg woman lifts. And once body fat percentage rises past a certain point, additional body weight no longer predicts additional strength. This is why body composition, not just body weight, is a much better predictor of what someone can lift.
Muscle Fiber Types and Fatigue Resistance
Women’s muscles are not just smaller versions of men’s muscles. They are built somewhat differently at the cellular level. A meta-analysis representing the largest compiled dataset on human muscle fiber types found that women have a greater proportion of Type I (slow-twitch) fibers than men, as well as a greater area occupied by those fibers relative to fast-twitch fibers.12PubMed. Sex differences in skeletal muscle fiber types: A meta-analysis Slow-twitch fibers are the endurance fibers, better at sustained, moderate-intensity work and more resistant to fatigue.
This fiber-type difference has practical consequences. A review of fatigue research concluded that women’s greater resistance to muscle fatigue is not explained by differences in motivation, muscle size, blood flow, or oxidative capacity, but is likely related to fiber-type composition.13PubMed. Sex differences in contractile properties and fatigue resistance of human skeletal muscle In plain terms, a woman may not lift as much as a man in a single maximal effort, but she can often sustain a higher percentage of her max for more repetitions before her muscles give out. If you have ever noticed a woman outperforming expectations on high-rep sets or endurance-based challenges while lagging on pure one-rep maxes, this is likely part of the explanation.
Menstrual Cycle Effects on Strength
One factor unique to women is that maximal strength fluctuates across the menstrual cycle. A systematic review with meta-analysis found that the early follicular phase, which corresponds roughly to the first few days of menstruation, was the least favorable window for all types of maximal strength. Isometric strength peaked during the late follicular phase (roughly the week before ovulation), while isokinetic strength peaked during ovulation itself.14PubMed Central. The Influence of Menstrual Cycle Phases on Maximal Strength Performance in Healthy Female Adults: A Systematic Review with Meta-Analysis
The effect sizes were small to medium, which means this is not the kind of swing that would make someone unable to function on a bad day. But it is measurable and consistent enough that women who track their cycles may notice it. If you have ever felt unusually strong during the middle of your cycle and sluggish during your period, the hormonal fluctuation is a real contributor, not just perception. For the average woman trying to gauge her own strength, testing on the first day of her period versus two weeks later could yield noticeably different numbers.
Energy Availability and Strength Performance
How much you eat has a surprisingly direct effect on how much you can lift, and this is a more acute problem for women than is commonly recognized. A controlled study on trained female athletes found that a period of low energy availability reduced body mass, muscle glycogen content, repeated sprint ability, time-trial performance, and the rate of force development in the knee extensors. Even after two days of recovery with adequate nutrition, some performance measures had not fully bounced back.15PubMed. Low Energy Availability Followed by Optimal Energy Availability Does Not Benefit Performance in Trained Females
This matters because chronic under-eating is more common among women than men, whether from intentional dieting, disordered eating, or simply not matching intake to activity level. A woman who is underfueled will test weaker than her physiology would predict, and not by a trivial amount. If you feel like you should be stronger than you are based on your training, insufficient calorie intake is one of the first things worth examining.
How Gender Stereotypes Limit Women’s Strength
Beyond biology, there is a measurable social dimension to how much women lift. Research on female exercise behavior found that exposure to gender stereotypes had a strong negative association with exercise participation. The effect was partially mediated by reduced psychological satisfaction during exercise and increased negative emotions, with these indirect pathways accounting for over half of the total effect of stereotypes on behavior.16PubMed Central. Gender stereotypes and female exercise behavior: mediating roles of psychological needs satisfaction and negative emotions
The implication is that cultural messaging about women being “naturally weak” or strength training being unfeminine doesn’t just affect attitudes. It affects physical outcomes, because women who internalize those messages are less likely to train, and therefore less likely to ever approach their biological ceiling. The average untrained woman’s lifting numbers reflect not just her physiology but also years of being steered away from the activities that would have built her strength. This makes population-level averages for untrained women somewhat misleading as indicators of what women’s bodies are actually capable of. A woman who trains consistently for even a few months will often blow past the “average” benchmarks, not because she is exceptional, but because the average is depressed by inactivity that has social roots as much as biological ones.
Practical Lifting Benchmarks by Experience Level
Putting the research together, here is a rough framework for what different women might expect across common lifts. These assume a woman of average body weight (roughly 60 to 70 kg) performing the movement with standard barbell technique:
- Untrained deadlift: 30 to 50 kg for a single rep. The deadlift uses the largest muscles in the body and tends to be the strongest lift for nearly everyone.
- Untrained squat: 20 to 40 kg. Mobility and comfort under a barbell often limit beginners as much as raw strength does.
- Untrained bench press: 15 to 25 kg. The upper-body gap is most visible here, and many women initially struggle with an empty 20 kg barbell.
- Trained (1+ years) deadlift: 80 to 120 kg. Strength gains in the first year of training are often dramatic.
- Trained bench press: 35 to 55 kg. Progress in pressing is slower than in pulling or squatting, consistent with the upper-body muscle mass gap described earlier.
- Workplace safe limit: Around 15 kg for repetitive lifting, less if twisting or carrying over distance.
These numbers have wide individual variation. A 55 kg woman will sit at the lower end; a 90 kg woman with a background in manual labor may exceed the upper end on day one. Training history, limb proportions, and even psychological factors like confidence under heavy loads all shift the picture. The fiber-type research also suggests that women who focus on higher-rep strength work may find their relative performance closer to men’s than the one-rep-max numbers would predict, because their endurance advantage compounds over multiple repetitions.