Weighted Blanket Calculator (about 10% of body weight)

Understanding the weighted blanket calculator — concept and principle

This calculator suggests a weighted blanket weight as a share of body weight, about 10% by default, and shows the nearest common size sold in pounds. It helps when choosing a blanket for an adult or a child aged 3 or older.

About 10% of body weight: with the default inputs the result is 7 kg (suggested weight).

How it is calculated

Suggested weight (kg) = body weight × chosen share ÷ 100

Weight in pounds = kg ÷ 0.45359237

Nearest common size: 5, 7, 10, 12, 15, 17, 20, 25 or 30 lb

Not for babies or toddlers under 3.

The principle

Weighted blankets apply gentle, even pressure, sometimes called deep pressure, which many people find calming. The 10% ratio comes from occupational therapy guidance on weighted covers for children and is the figure most often used for adults. Blankets are made in pound steps, so the closest step is shown; when between sizes, the lighter one is the safer choice.

Worked example

Default inputs: 70 kg, adult, 10%.

Suggested weight = 70 × 10 ÷ 100 = 7 kg.
In pounds = 7 ÷ 0.4536 = 15.4 lb.
Nearest common size = 15 lb = 6.8 kg.

Each point is the calculator re-run with only “Body weight of the user (kg)” changed; the gold point is the default example. Change the inputs above and this chart follows your numbers.

Body weight of the user (kg)	Suggested blanket weight (kg)
17.5	1.8
35	3.5
52.5	5.3
70	7
87.5	8.8
105	10.5
140	14

How to read the result

The result is a starting point, not a medical prescription. Comfort is personal; some people prefer a lighter blanket. Evidence for benefits such as better sleep or less anxiety is mixed and still developing. The user must always be able to remove the blanket easily and keep the head and face uncovered.

Common mistakes

Choosing a heavier blanket in the belief that more is better.
Using a weighted blanket for infants or toddlers.
Using it for people who cannot move it off themselves.

Keep in mind: Weighted blankets are not suitable for babies and young children under 3, or for people with some breathing, circulation or mobility problems. Ask a doctor if unsure.

Frequently asked questions

How heavy should a weighted blanket be?

Commonly about 10% of body weight.

Can couples share one?

A single weighted blanket shared by two is usually too heavy for one and too light for the other; individual blankets are often recommended.

Do weighted blankets help sleep?

Some studies suggest benefits for some people, but evidence is limited.

Sources: Eron K, Kohnert L, Watters A, et al., "Weighted blanket use: a systematic review", Am J Occup Ther 2020;74(2):7402205010

Checked 9 Nov 2026. Ordre des ergothérapeutes du Québec (OEQ), position statement on weighted covers (Dec 2008): about 10% of the child’s body weight; Alberta College of Occupational Therapists, position statement on the use of weighted covers (caution with infants and toddlers, never as a restraint, head and neck free).

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