Weighted Blanket Weight Guide
One of the most common mistakes people make when buying a weighted blanket is choosing the wrong weight. Too light and you lose the therapeutic benefit. Too heavy and you overheat, restrict movement, and end up sleeping worse than before. The right weight makes the difference between a life-changing purchase and an expensive throw blanket.
Here's everything you need to know to get it right the first time.
The rule of thumb: Choose a weighted blanket that's approximately 10% of your body weight. For most adults, this means a 12–20 lb blanket. 15 lbs is the most popular choice and works for the majority of people weighing between 120–180 lbs.
Why the 10% rule exists
The 10% guideline comes from occupational therapy research on deep pressure stimulation — the mechanism that makes weighted blankets work. Studies show that distributed pressure equivalent to roughly 10% of body weight activates the parasympathetic nervous system most effectively, reducing cortisol and increasing serotonin without creating the sensation of being restricted or pinned down.
Go significantly above 10% and the blanket starts to feel uncomfortable rather than calming. Most adults report that anything above 25 lbs feels more suffocating than soothing, regardless of their body weight.
Weighted blanket weight by body weight
| Your body weight | Recommended blanket | Notes |
|---|---|---|
| Under 100 lbs | 7–10 lbs | Children and lighter adults |
| 100–130 lbs | 10–12 lbs | Go lighter if you sleep hot |
| 130–180 lbs | 12–18 lbs | 15 lbs is the sweet spot |
| 180–220 lbs | 18–20 lbs | Heavier fill, same calming effect |
| Over 220 lbs | 20–25 lbs | Avoid going above 30 lbs |
Should you go heavier or lighter if you're between weights?
Go lighter. Always. If you're between 15 lbs and 20 lbs, start with 15. Here's why:
- A blanket that's too heavy creates physical resistance when you turn over, which disrupts sleep architecture
- Heavier blankets trap more heat, which is the number one reason people abandon weighted blankets
- The therapeutic effect doesn't dramatically increase above the 10% threshold — but discomfort does
Side sleepers specifically: Go one weight bracket lighter than the table suggests. On your side, the blanket piles on top of one half of your body rather than distributing evenly, making it feel heavier than it is.
Does the fill material change how heavy it feels?
Yes — significantly. There are two main fill types, and they behave very differently at the same weight.
Glass microbeads (what our blanket uses) are small, dense, and distribute evenly throughout the blanket. A 15 lb glass bead blanket feels evenly heavy across your whole body. Plastic poly pellets are larger and tend to migrate to one area, creating uneven pressure and cold spots. Glass beads are universally considered the superior fill for therapeutic use.
What about children?
The same 10% rule applies, but with important safety caveats. Weighted blankets should not be used for children under 2 years old, and for children between 2–5, consult a paediatrician first. For older children, the blanket weight should never exceed 10% of their body weight and should have an easy-to-remove opening so they can get out independently.
Safety note: Children should always be able to remove a weighted blanket without adult assistance. Never use a weighted blanket on a child who cannot communicate discomfort.
How to know if you chose the right weight
After 3–5 nights, a correctly weighted blanket should make you feel calmer as you settle in, not more aware of the blanket's presence. If you're still thinking about the blanket's weight when you're trying to sleep, it's likely too heavy. If you feel no different than you do under a regular duvet, it may be too light.
Most people feel a meaningful difference in how quickly they fall asleep within the first week of using the correct weight.
