How long does it take to make a friend as a mom?
It takes roughly 50 hours together to turn an acquaintance into a casual friend, about 90 to become real friends and more than 200 to become close friends, according to research by Jeffrey Hall at the University of Kansas. That's why small mom groups tend to work better than big communities: when six to ten moms live near each other and keep seeing the same faces, those hours add up without anyone having to plan every one of them. Large forums and one-on-one friend apps each help in their own way, but neither tends to deliver repeated time with the same people. And if making friends as a mom feels slow or harder than you expected, those numbers may be a relief, because they suggest that friendship simply takes a lot of time for most adults.
How long does it take to make a friend?
Hall's study, published in 2018 in the Journal of Social and Personal Relationships, drew on two groups: 355 adults who had moved to a new city in the previous six months, and 112 first-year college students followed over their first weeks at university. The headline numbers, as summarized by the University of Kansas, were around 50 hours to go from acquaintance to casual friend, around 90 hours to reach "friend" and over 200 hours for a close friend. Greater Good Magazine at UC Berkeley looked at the details and pointed out that the adults who had moved needed considerably more hours than the students to make each step. So if it feels like friendship came easier at school and moves at a crawl now, you're not imagining it, and you're not doing anything wrong. That slower pace is exactly what the research found in adults.
Hall also found that not all time counts equally. Hours spent working together barely moved the needle, while hanging out, catching up on each other's lives, joking around and having the occasional serious conversation did. Now run the math with a baby. If you see someone for two hours a week, it takes about six months to reach those first 50 hours. Seen that way, it's completely normal to have been to a handful of meetups and still not feel like you have a friend yet, so please go easy on yourself. Those hours only pile up when getting together is easy enough to repeat week after week, and that's where group size and distance come in.
Why does living nearby make friendship easier?
One of the oldest findings in social psychology comes from Leon Festinger, Stanley Schachter and Kurt Back, who published their study of Westgate, a housing complex for married MIT students, in 1950. Families had been assigned to apartments essentially at random, and the researchers found that people who lived closer together, or who passed each other on the way home, were far more likely to become friends than people who rarely had a chance to cross paths. A later paper on friendship and location data adds a telling caveat: the Westgate study looked mostly at the men and may have missed the role women played in those friendships. There's something reassuring in that old study. A lot of friendship grows out of simply being near each other often enough, which is something you can make room for.
Sociologist Rebecca G. Adams, quoted in a 2012 New York Times piece on making friends as an adult, put it as three conditions: proximity; repeated, unplanned interactions; and a setting that encourages people to let their guard down and confide in each other. Those conditions tend to vanish after college, which helps explain why it may feel harder now than it used to. The hopeful part is that early motherhood can bring them back, as long as the other moms live close enough that bumping into each other at the playground on a random Tuesday is likely.
What's the right mom group size?
There's a very practical reason to keep groups small. In 1995, Robin Dunbar and colleagues reported that spontaneous conversations rarely include more than about four people, a limit they linked to how we produce and hear speech. Bigger groups naturally split into clusters. With eight moms at a park, that's ideal, because you get two or three conversations going and each week you end up talking to someone different without losing track of the rest. With forty, every meetup has new faces and it's hard to stack up hours with any one person. If you've ever left a big meetup feeling lonelier than when you arrived, the size of the group may have had a lot to do with it.
Online, there's a similar pattern. In 2006, Jakob Nielsen of the Nielsen Norman Group described the 90-9-1 rule: in large online communities, roughly 90% of people only read, 9% contribute now and then and 1% produce most of the content. Nielsen himself frames it as a rough rule rather than a precise law, but it's easy to recognize in mom groups with thousands of members, where you read a lot and get to know almost nobody. So if you're someone who scrolls quietly and rarely posts, you're in very large company, and it says nothing about what you have to offer.
What big communities and 1:1 friend apps do well
It's worth being fair here. A big local parenting group with hundreds or thousands of members is great for questions at 3 a.m., hand-me-down strollers and finding out which pediatrician people in your area like. What it rarely gives you is repeated time with the same faces, which is exactly what the research says friendship runs on. That's why a group can be genuinely helpful and still leave you feeling a bit alone.
Apps that match you with one other mom at a time have real strengths too. Talking to one person is easier than walking up to a group, you can filter for things you have in common, and a one-on-one coffee can feel less intimidating. The tender spot is that everything hangs on a single connection and a single schedule. If one of you cancels because the baby has a fever, there's no meetup, and if the chemistry isn't there, you're back to square one, which can sting even when nobody did anything wrong. In a small group, one cancellation doesn't sink the plan, because the others still head to the park.
How to make a small mom group stick
Whether you already have a group or would like to start one, the thing that tends to help most is turning meetups into a routine. The same day, the same time and the same place (one bench in one park, one library when it rains) mean nobody has to organize anything and the group doesn't depend on one person taking the initiative every week.
Small, low-key invitations count as well. A quick "I'm doing a stroller loop at 10 if anyone wants to join" in the group chat is the grown-up version of the unplanned encounters Adams describes. And when someone clicks with you, you could invite her to something more, even if it feels a little vulnerable, because, as Hall put it, "You can't make people spend time with you, but you can invite them."
There are several ways to find a group like this. Postpartum and breastfeeding groups (ask your midwife, pediatrician or hospital), library baby storytimes and the playground itself are all solid starting points, and if you're a mum in the UK, your local library or family hub can usually point you to baby groups nearby. TribuMama was built around the same idea: it brings moms from the same neighborhood together in tribes of up to 10, a short walk from home, with no feed and no followers, so you can meet in person. If you have questions about how it works, the FAQ covers them.
If you take one thing away from all this, let it be that adult friendship usually moves slowly, and that the slowness says nothing bad about you. Each stroller walk and each half-finished coffee at the park is quietly adding to those hours, even when it doesn't feel like it. If you keep showing up when you can, one day you may look around and realize those familiar faces have become your people.
Sources
- How to make friends? Study reveals how many hours it takes, University of Kansas (2018)
- How Long Does It Take to Make a Friend?, Greater Good Magazine, UC Berkeley (2018)
- Can Smartphone Co-locations Detect Friendship? It Depends How You Model It, Malik et al., arXiv (2020)
- Life Course Leads to Loneliness?, The Society Pages, on The New York Times (2012)
- Size and structure of freely forming conversational groups, Dunbar, Duncan and Nettle, Human Nature (1995)
- The 90-9-1 Rule for Participation Inequality in Social Media and Online Communities, Nielsen Norman Group (2006)
