Mental age test

What "mental age" means on the internet

Online, your mental age is how old you act, not how old you are. Someone who goes to bed at 9:30 and owns a favourite kettle gets called an old soul. Someone who still gets giddy about bouncy castles is a kid at heart.

It's a joke people play with their friends, and that's how this quiz works too. The questions look at your habits and tastes: how you spend a free Saturday, what's in your bag, how you text, how you handle a fight. Then we turn your answers into a number.

Neither end is better. Being young at heart usually means curious and playful. Being an old soul usually means calm and settled. Most people are a mix.

Where the term really comes from (and why this isn't that)

"Mental age" started as a serious idea. In 1905 the French psychologist Alfred Binet and his colleague Théodore Simon built a test to find schoolchildren who needed extra help. Each task was matched to the age at which typical children could pass it. A child who passed the tasks for a typical 8-year-old had a mental age of 8, whatever their birthday said.

In 1912 the German psychologist William Stern suggested dividing mental age by real age. That ratio became the "intelligence quotient", or IQ. Lewis Terman's 1916 Stanford-Binet test multiplied it by 100, which is where IQ scores around 100 come from.

The idea didn't work well for adults, because the skills those tests measured stop climbing in the late teens. Later IQ tests, starting with David Wechsler's in the late 1930s, dropped the mental age ratio and compared people with others their own age instead.

This quiz has nothing to do with any of that. It doesn't measure intelligence, maturity or anything about how your mind works. It's about vibes: snacks, naps and if you're still awake at 2 a.m.

How your number is worked out

Every answer is worth 0 to 3 points. 0 is the most young-at-heart answer ("Build a blanket fort") and 3 is the most old-soul answer ("Up at six, a walk, some gardening"). Two questions have three answers instead of four, but the oldest answer is still worth 3. The answers are shuffled, so the youngest one isn't always first.

We add up your points out of a possible 60 and turn that into a score from 0 to 1. Your mental age is 8 + 64 × that score, rounded to a whole number. So 0 points gives 8, 30 points gives 40, and all 60 points gives 72. Put another way, it's your average answer mapped onto the range 8 to 72.

Your result type follows the number: 8–21 is Kid at heart, 22–30 is Forever young, 31–40 is Fresh grown-up, 41–50 is Steady adult, 51–59 is Seasoned and settled, and 60–72 is Old soul.

The six results in brief

Kid at heart (8–21): playful, excitable, all in on fun. Forever young (22–30): late nights, new trends, big plans, little sleep.

Fresh grown-up (31–40): bills paid, still up for a spontaneous night out. Steady adult (41–50): routines, a good frying pan, calm in a crisis.

Seasoned and settled (51–59): a few close friends, the long view, very hard to rattle. Old soul (60–72): early nights, real talks, tea and a cardigan.

How old do people actually feel?

There is real research on something close to this. Psychologists call it subjective age: how old you feel, as opposed to how old you are. Studies in many countries have found that most adults feel younger than their real age, and the gap tends to grow as people get older.

Teenagers often feel a bit older than they are. By middle age, lots of people say they feel years younger. Our quiz doesn't measure subjective age, but it plays with the same idea: your birthday is one number, and how you live is another.

So if a friend in their twenties scores 65, they're not wrong about their age. They just like early nights.

How seriously to take it

Not very. This is a quiz for fun, written for this site, and nobody has tested it as a measure of anything. Your answers would shift if you took it on a lazy Sunday instead of a busy Monday, and that's fine.

A low number doesn't mean you're immature, and a high one doesn't mean you're boring or wise. A 19-year-old who loves gardening and a 60-year-old who loves theme parks are both doing life right.

If you want a test with real research behind it, try the Big Five personality test on this site. It measures five traits psychologists actually use, and gives you a score for each one.