Quick Facts
| L'âge | 21 months |
| Length | ~78–92 cm (WHO range, ~21 months) |
| Weight | ~8.6–14.7 kg (WHO range, ~21 months) |
| Daily Sleep | ~11–14 hours (usually 1 nap + nights) |
| Lait | Whole cow’s milk or toddler formula, up to ~500 mL/day |
| Le fer | ~7 mg a day (1–3 years) |
Length and weight are the WHO 3rd–97th percentile range (both sexes) from the WHO Growth Charts for Canada. Your provider tracks your toddler’s own growth on these charts.
Key Takeaways
At 21 months, most toddlers have the 18-month skills the Canadian Paediatric Society describes and are building toward the next set at 24 months.
Gross Motor
A 21 month old walks confidently, is running more, and climbs into and down from chairs, building toward the 24-month skills the Canadian Paediatric Society lists (running, kicking or throwing a ball, walking up and down stairs with help). Give safe space and lots of active play.
Fine Motor
A 21 month old stacks several blocks, scribbles, uses a spoon well, and may try simple shape-matching, building toward a 4-block tower and simple puzzles by 24 months, per the Canadian Paediatric Society. Offer blocks, crayons, chunky puzzles and pretend-play props.
Social & Language
A 21 month old has a fast-growing vocabulary, may put two words together, copies adults and other children, plays alongside others, and shows increasing independence, per the Canadian Paediatric Society’s 24-month milestones. Name things, read daily, and expand on your toddler’s words.
DEVELOPMENT & PLAY
- Offer active play — walks, dancing, ball games — and safe places to climb.
- Provide blocks, crayons, chunky puzzles and pretend-play props, and read together daily.
- Model two-word phrases and expand on your toddler’s words and feelings.
FEEDING
- Offer a variety of family foods in safe textures; keep iron-rich foods coming toward the ~7 mg daily need for 1–3 years.
- Keep milk (whole cow’s milk or toddler formula) to about 500 mL a day, in a cup.
- Offer water with meals and snacks; continue vitamin D for breastfed and partly breastfed toddlers.
SAFETY
- Supervise near stairs, streets and playground equipment now that your toddler runs and climbs.
- Keep hazards and choking-risk foods out of reach, and keep furniture anchored.
Questions fréquemment posées
What should a 21 month old be doing?
A 21 month old usually walks and runs, climbs, stacks blocks, uses a spoon, has a fast-growing vocabulary with some two-word combos, and plays alongside other children, building toward the Canadian Paediatric Society’s 24-month milestones. Every child develops at their own pace; raise concerns, especially in more than one area, with your doctor.
How many words should a 21 month old say?
There’s a wide normal range. Many toddlers have a rapidly growing vocabulary at this age and start putting two words together, which the Canadian Paediatric Society lists among the 24-month milestones. Understanding usually runs ahead of speech. Keep talking, reading and expanding on your toddler’s words. If your toddler isn’t using single words, raise it with your doctor.
How much should a 21 month old eat and drink?
Offer a variety of family foods at regular meals and snacks, with iron-rich foods still important (about 7 mg iron a day for 1–3 years), per the Canadian Paediatric Society. Keep milk to about 500 mL a day, in a cup, and offer water with meals. Let your toddler decide how much to eat — appetites swing normally. Avoid choking-risk foods and added salt and sugar.
How do I handle toddler meltdowns?
Meltdowns are normal as toddlers’ feelings outpace their words and self-control. Stay calm, name the feeling, keep limits consistent and kind, and reconnect afterward. Offering simple choices gives a sense of control and can head some off. They ease as language and self-regulation grow; if they’re extreme or you’re worried, your doctor can help.
How much sleep does a 21 month old need?
A 21 month old usually sleeps around 11 to 14 hours over a 24-hour period, per the Canadian Paediatric Society, typically on one afternoon nap. A consistent bedtime routine, a calm wind-down, and avoiding late naps all help. A comfort item like a blanket or stuffed animal is often welcome.
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