Calcium for Vegan Kids Without Dairy: Daily Targets and the Best Plant Sources

"But where do they get their calcium?" is probably the second most common question vegan parents hear, right after protein. It deserves a proper answer, because calcium is one of the nutrients where vegan children do sometimes fall short — not because plants lack it, but because the richest plant sources are not the foods kids reach for on their own.

The good news: two or three deliberate choices cover it.

Daily calcium targets for children

RDAs from the U.S. National Academies.

Age	Calcium per day
0–6 months	200 mg (Adequate Intake)
7–12 months	260 mg (Adequate Intake)
1–3 years	700 mg
4–8 years	1,000 mg
9–18 years	1,300 mg
Adults 19–50	1,000 mg

Notice the jump at age 9. The years from roughly 9 to 18 are when the skeleton lays down most of its lifetime bone mass. Teenagers on any diet frequently miss 1,300 mg, and vegan teenagers need a plan for it.

The best plant sources of calcium

Approximate values from USDA FoodData Central. Fortified products vary by brand — check labels.

Food	Serving	Calcium
Fortified plant milk (soy, oat, almond, pea)	1 cup (240 ml)	300–450 mg
Calcium-set tofu (look for "calcium sulfate" in ingredients)	½ cup (125 g)	250–430 mg
Fortified orange juice	1 cup	300–350 mg
Fortified plant yogurt	1 pot (150 g)	120–200 mg
Chia seeds	1 oz (28 g, ~2 tbsp)	180 mg
Bok choy, cooked	1 cup	160 mg
Blackstrap molasses	1 tablespoon	100–200 mg
Tahini	2 tablespoons	130 mg
Kale, cooked	1 cup	95–175 mg
Edamame, cooked	1 cup	100 mg
White beans, cooked	1 cup	160 mg
Almonds	1 oz (28 g)	75 mg
Broccoli, cooked	1 cup	60 mg
Dried figs	5 figs	70 mg
Oranges	1 medium	60 mg

The big three are fortified plant milk, calcium-set tofu, and fortified juice or yogurt. Everything else is useful topping-up. A child who drinks two cups of fortified soy milk a day is already at 600–900 mg before eating anything else.

Absorption: not all calcium is equal

The body absorbs roughly 30% of the calcium from milk and fortified plant milk, and a similar amount from calcium-set tofu and fortified juice. Low-oxalate greens — kale, bok choy, broccoli, collards — are absorbed better than that, at around 50–60%.

Spinach, chard, and beet greens are the exception. They are high in oxalates, which bind calcium; only about 5% is absorbed. They are still good foods, but do not count them toward calcium.

Vitamin D is required to absorb calcium at all. Most pediatric guidelines recommend 400 IU for infants and 600 IU for children over one, regardless of diet. A vegan vitamin D3 (from lichen) or D2 supplement is the usual approach.

A day that reaches 1,000 mg for a 7-year-old

Meal	Food	Calcium
Breakfast	Cereal with 1 cup fortified soy milk	350 mg
Lunch	Sandwich with tahini and banana; 1 clementine	160 mg
Snack	Fortified plant yogurt with chia seeds (1 tbsp)	250 mg
Dinner	Tofu (½ cup, calcium-set) and broccoli stir-fry with rice	360 mg
Total		~1,120 mg

For a 12-year-old who needs 1,300 mg, add a second cup of fortified milk or a glass of fortified orange juice.

Practical tips that actually work

Make fortified milk the default. Use it in cereal, smoothies, porridge, mashed potatoes, pancakes, and sauces. Most calcium arrives invisibly this way.
Shake the carton. Added calcium settles at the bottom. An unshaken carton delivers far less than the label claims.
Buy calcium-set tofu. Check the ingredients for calcium sulfate or calcium chloride. Tofu made with nigari (magnesium chloride) has much less.
Tahini is a secret weapon. Hummus, dressings, drizzled on roasted vegetables, mixed into oatmeal.
Chia pudding is one of the few high-calcium foods toddlers will ask for.
Separate calcium from your main iron meal where practical. Calcium can reduce iron absorption when eaten together. Fortified milk at breakfast and snack, lentils with tomato at dinner, is a good rhythm.

Signs calcium might be low

Calcium deficiency rarely shows short-term symptoms because the body pulls calcium from bone to keep blood levels stable. That is exactly the problem — you do not notice until bone density is affected years later. This is why tracking intake matters more for calcium than for almost any other nutrient.

Red flags that warrant a conversation with your pediatrician: a child who refuses all fortified products, frequent fractures, or a diet with no plant milk, tofu, or fortified foods at all.

Tracking it without the maths

Calcium is the nutrient parents most often believe they are covering and most often are not, because it depends on which tofu you bought and whether the carton got shaken.

OhMyNutri tracks it against each family member's own target — 700 mg for your toddler, 1,300 mg for your 11-year-old, 1,000 mg for you. Log the stir-fry once; the app works out who ate what. When a week comes in low, you see it and add a chia pudding. No spreadsheets.

Frequently asked questions

Is almond milk a good calcium source for kids?

Only if fortified — and most are. But almond milk is very low in protein and calories. For children under five, fortified soy or pea milk is the better default because it also provides protein. Use almond or oat milk as an extra, not the only milk.

Can children get enough calcium from vegetables alone?

In theory, but it takes many cups of kale a day. Fortified foods and calcium-set tofu make it realistic.

Do vegan kids need a calcium supplement?

Usually not if fortified milk and tofu are regular. If your child refuses those, ask your pediatrician about a supplement rather than hoping greens will cover it.

What about bone health studies in vegan children?

A 2021 Polish study found lower bone mineral content in vegan children, strongly linked to lower calcium and vitamin D intake in non-supplementing families. Children who met calcium and vitamin D targets did not show this gap. The takeaway is the same as everywhere in vegan nutrition: the diet is fine, the unplanned version is not.