What Is the Average Height of a 3-Year-Old?

The average height of a three-year-old boy is 37.5 inches or three feet and 1.5 inches, and the average height of a three-year-old girl is 3 feet and 1.1 inches or 37.1 inches tall.

The average weight of a three-year-old boy is 31.8 pounds and the average weight of a three-year-old girl is 30.7 pounds.

This information is a guideline from the United States Centers for Disease Control and Prevention (CDC) which also notes that there are many factors that go into a healthy weight and growth cycle of three-year-old children.

The average height of a three-year-old boy is 37.5 inches tall and the average height of a three-year-old girl is 37.1 inches tall.

For both boys and girls, average heights are almost identical, and average weights are just a few ounces apart.

The average weight of a three-year-old boy is 31.8 pounds while the average weight of a three-year-old girl is 30.7 pounds.

What is involved in a three-year-old’s development?

 growth and weight dev

The factors involved in a three-year-old’s growth and weight development are varied, but typically include healthy amounts of rest and play, with a good diet.

The age of three years is an important one, and there are many milestones that are met during this critical stage of life.

When a three-year-old has their checkup, the doctor will monitor their height and weight and compare them with the normal curve of growth charts.

This chart will show where a child at this age should be when it comes to growing.

It will also help any doctor know if the three-year-old is growing at the right rate. The doctor may also look at different milestones to see if the child has been reaching them.

It is possible that not every child will be on the normal curve for these milestones. Every doctor knows that every child grows at their own rate and meets milestones at their own pace.

Making sure that your child is eating well, sleeping well, and playing well will help them to meet those growth and height milestones when their bodies are ready to get them there.

What are the milestones that three-year-olds should reach?


There is no hard and fast rule as to what milestones three-year-olds should reach, but there are general guidelines.

For growth and height, boys will be on average 37.5 inches tall, and girls will be on average 37.1 inches tall.

Boys will be on average 31.8 pounds, and girls will be 30.7 pounds in weight.

Other milestones that three-year-olds will reach will be related to speech, motor skills, and in many cases, potty training.

By the age of three, many three-year-olds have been talking for a little while or at least trying to.

They will start to have a vocabulary in the 500-word range, and sometimes less than that.

Stuttering and using the wrong words or grammar choices are common at this age. Three-year-olds are also starting to develop their motor skills, and so their height and weight requirements will play a role in how these skills develop.

Children will begin walking up and down the stairs with one foot in front of the other.

What kind of behavior will a three-year-old have?

 notorious behavior patterns

Three-year-olds have some notorious behavior patterns, as their emotional centers are very active.

That is because the executive functioning component of their brain is not fully developed and won’t be for some time.

They don’t see ahead to the outcomes of things happening in front of them.

Meltdowns and tantrums are common, as the terrible twos become the cranky and demanding threes.

They want to do something, and can’t, and don’t understand why. Attachment behaviors are also noticed at this time, with separation anxiety being very common.

When a child is taken to daycare, or mom and dad go out for an afternoon to run errands, the scream fests mean love because they don’t know how else to express that.

This is all part of their normal health and growing up and is not typically connected to growth and weight trends.

There are some health and nutrition matters, however, that may contribute to these emotions that are connected to growth and weight trends.

What are common health and nutrition concerns for three-year-olds?

natural development

A three-year-old needs to eat fewer calories than an adult but needs to eat more frequently. Many small meals and snacks throughout the day are important for their natural development.

The recommended timeline of the daily menu for a three-year-old is breakfast, snack, lunch, snack, and dinner, and sometimes an evening snack approximately one hour before bed.

It is important that a child has a variety of foods in their diet and a diet that includes as many food groups as possible.

This should include vegetables, protein, fruit, grain, and dairy every day. The most ideal scenario is to include some of these elements in every meal.

Both three-year-old boys and girls need approximately 1,000 calories every day in order to remain as close as possible to normal growth patterns and trends.

You don’t need to count calories unless you are seriously concerned they aren’t getting enough.

After a few meals and snacks of calorie counting, you will see how easy it can be to get to that calorie count.

Is sleep an important part of a three-year-old’s growth pattern?


Sleep is a very important part of a three-year-old’s growth pattern. With sleep comes cell division.

You may recall that babies sleep a lot, much more than toddlers do.

That is because they are growing. Cell division is necessary for that growth, and, while it does occur when they are awake, it is faster when they are sleeping.

That is because a child is active and burning calories and the body is focusing on those activities, in addition to cell division, when the child is awake.

A three-year-old typically needs from 10 to 13 hours of sleep every day, and that includes both evening and day sleep.

That is on average, and schedules can be adjusted accordingly. Some children will not sleep long during the day but may have a long sleep at night.

Will a three-year-old grow properly if they aren’t sleeping enough, or too much?

proper diet

A three-year-old can still grow properly if their sleep patterns aren’t aligned with normal trends.

It would be important here to ensure that they have a proper diet and play pattern in their everyday activities.

Adding more active play or outside time can help three-year-olds adjust their sleep pattern to sleeping more hours or sleeping less if they are sleeping a lot.

This is usually the time of their growth cycle when they do not need to wake up in the middle of the night, but sometimes they still will.

This could be a sign of a sleep problem or an illness. They may also be experiencing sleep issues like bad dreams or may just not be able to fall asleep.

Keeping children active during the day and giving them a healthy diet would help. Make changes where your instinct lies.

It could be likely this is normal behavior but if it feels like it is not, it’s never a bad idea to check in with the doctor and get their opinion.

What are good activities that promote three-year-olds healthy growth patterns?

A good diet and regular activities both indoors and outdoors are excellent ways to structure a three-year-old’s schedule.

regular activities

This will help them to stay consistent with normal growth patterns or keep them as close to those trends as possible.

It is entirely possible that you may just have a larger or smaller child that isn’t in the middle of the normal growth curve.

Your doctor will let you know at your regular checkups what that could mean, if anything. Indoor activities that make them think a little bit, and tire them out a little bit, like puzzles, coloring, and pretend reading will help them to keep their brains busy both night and day, even when they are sleeping.

Outdoor activities that stimulate gross motor skill development will help those bones and muscles to elongate with the child’s normal course of development.

Activities that stimulate fine motor skill development help as well. That could include blowing bubbles outside, collecting rocks, or manipulating blocks and Lego pieces.

Taking a walk and then wrapping that up with a session with blocks will keep a three-year-old mind and growth cycle in constant progression, even if they aren’t spot on the normal growth chart.

Is screen time a bad idea for a three-year-old?

tablet with supervision

Screen time is not a bad idea for a three-year-old. Screen time is part of the world now and having a child using a smartphone or tablet with supervision can help to stimulate their development.

If you are concerned about excessive use of screen time, you can limit the amount of time a child is looking at a screen or playing online.

Most experts will say that one hour a day of screen time is a good start for a child. You can find brain-stimulating apps and activities online that make you feel more comfortable with a child on the tablet or computer.

There are many apps and games for children of this age that are designed to nurture their neural development.

At the same time, ensuring there is a physical activity within the same time frame as screen time can help considerably when you are concerned the child is on the screen too much.

Both of these activities will help three-year-olds to stay consistent with normal growth patterns in their own ways.

physical activity

When you are concerned about any activity being too little or too much, a call to the doctor is always recommended.