Relief for Body is reader-supported. When you buy through links on our site, we may earn an affiliate commission. This doesn't affect our verdicts.
Short version: take 10 percent of your body weight and round to the nearest size brands actually sell (5, 7, 10, 12, 15, 17, 20, 25 lb). A 150 lb adult lands on 15 lb, a 180 lb adult on 17 or 20. Buy it in an individual size around 48 x 72 inches, whatever bed you sleep in. Couples with more than about 30 lb between them do better with two blankets than one shared queen.
That 10 percent figure is a manufacturer convention, not a clinically validated dose. A 2020 systematic review of eight studies found weighted blankets may help with anxiety, found too little evidence for insomnia, and called for more research before anyone sets firm guidelines. Treat the number as the starting point the size charts are built around. Go much heavier and the blanket becomes hard to move under; go much lighter and you are paying for a regular blanket with a therapeutic label.
Weighted blanket calculator
Enter your weight, or switch to “Two of us” to check whether one shared blanket can work for both of you. It runs in your browser and stores nothing.
The 10 percent figure is the convention manufacturers build their charts on, applied to an individual blanket of about 48 x 72 inches. It is not a clinical dose: a 2020 systematic review of eight studies found too little evidence to set one. For a shared blanket the calculator keeps the pressure per square inch equal to what the lighter partner's own blanket would give, because a heavier queen spread over more fabric does not press harder on either of you. Weights are rounded to the steps most brands sell: 5, 7, 10, 12, 15, 17, 20, 25 and 30 lb. Nothing you type leaves this page.
How do you calculate the right weight?
Multiply your body weight by 0.10, then round to a size that exists. Most brands step in 5, 7, 10, 12, 15, 17, 20 and 25 lb, so landing within a pound or two of the exact figure is normal. If this is your first weighted blanket, round down: going up a step later is easy, and sleeping under too much weight from night one is the usual reason people give up on them. People who already know they like heavy bedding often round up.
| Body weight | 10 percent | Size to buy |
|---|---|---|
| 100 to 120 lb | 10 to 12 lb | 10 or 12 lb |
| 120 to 150 lb | 12 to 15 lb | 12 or 15 lb |
| 150 to 180 lb | 15 to 18 lb | 15 or 17 lb |
| 180 to 220 lb | 18 to 22 lb | 17 or 20 lb |
| 220 to 260 lb | 22 to 26 lb | 20 or 25 lb |
| Over 260 lb | 26 lb and up | 25 lb, rarely 30 (most ranges stop here) |
Above 25 to 30 lb, turning over underneath gets hard for most people. If your figure lands past that, size down rather than chase the percentage. Part of what makes weighted bedding work is being able to shift and resettle without fighting the weight.
What size weighted blanket do you need?
Smaller than you think. A weighted blanket is meant to lie on top of your body, not hang over the edge of the mattress the way a comforter does. The overhang pulls the blanket off you during the night, and every extra square inch of fabric also has to carry fill, which is why bed-sized versions get heavy fast.
| Blanket size | Typical dimensions | Who it fits |
|---|---|---|
| Kids | 36 x 48 or 41 x 60 in | One child, using the maker’s children’s chart |
| Individual (often sold as “twin”) | 48 x 72 in | One adult on any bed, from twin to king |
| Queen | 60 x 80 in | One tall adult, or two people of similar weight |
| King | 80 x 87 in | Two people of similar weight who want full coverage |
For reference, a standard US twin mattress is 38 x 75 inches, a full 54 x 75, a queen 60 x 80 and a king 76 x 80. A 48 x 72 blanket on a queen bed looks small, and that is how it is supposed to look: it covers you, from shoulders to shins, and leaves the rest of the bed to a normal duvet.
Does it matter if it’s glass beads or poly pellets?
Fill type changes how the weight actually feels, not just how much of it there is. Glass beads are smaller and denser, which lets a blanket carry real weight without becoming bulky. Poly pellet fill is cheaper to manufacture but needs more volume to hit the same weight, so a poly-filled blanket at the same number of pounds tends to feel puffier and less evenly distributed. The difference is easiest to notice when you lie under both: a glass-bead blanket tends to drape and settle close to the body, while a poly-pellet blanket at the same weight can feel like it’s sitting on top of you rather than around you.
Buyer reviews across weighted blanket brands consistently favor glass bead fill for how evenly it settles across the body rather than pooling in corners after a few weeks of use.
YnM Weighted Blanket
Glass bead fill across a wide range of weights, a reasonable default for a first weighted blanket.
- Available in weight increments that closely track the 10 percent guideline
- Removable, washable duvet cover instead of an all-in-one design
- Quilted in small squares, which is what stops the glass beads pooling at one end
Bearaby Cotton Napper
A chunky-knit alternative that adds weight through fabric density instead of bead fill.
- No internal fill at all; weight comes from thick, breathable knitted fabric
- Tends to sleep cooler than bead-filled blankets, useful if you run warm
- Weight is picked at roughly 10% of body weight, so check the size chart before ordering
Bare Home Cotton Weighted Blanket
A cotton-shelled bead blanket you can put through the machine yourself, rather than one that expects you to wash a cover instead.
- The maker prints the sizing rule itself: about ten percent of body weight, so a 150 lb adult lands on the 15 lb blanket
- Reinforced stitching against the fill shifting or leaking, which is the failure mode that ruins these
- Machine wash cold on a gentle cycle, hang dry, and thirty nights to decide
How heavy should a weighted blanket be for a couple?
Adding the two body weights together and taking 10 percent is the mistake most couples make. It produces a blanket that is far too heavy for the lighter partner, because what you feel is not the total weight but how much of it presses on each square inch of you.
The figure that matters is pressure. A 15 lb individual blanket spreads its weight over about 3,456 square inches (48 x 72). A queen covers 4,800, so to press as hard as that individual blanket it needs about 21 lb; a king, at 6,960 square inches, about 30 lb. That is why a shared queen around 20 lb does not feel twice as heavy as a 10 lb one on each person: the extra weight is spread over extra fabric.
Worked example: partners at 140 lb and 200 lb sharing a queen. The lighter partner’s own blanket would be 14 lb, which on queen fabric works out to about 19 lb; the nearest size that does not overshoot is 17 lb. Under that 17 lb queen, the 200 lb partner gets roughly 60 percent of the pressure their own 20 lb individual blanket would give. Most people notice a gap that large. Two individual blankets, 15 lb and 20 lb, each about 48 x 72, under one ordinary duvet, solve it and are often cheaper than one heavy queen.
When partners are within 20 or 30 lb of each other, a shared queen or king sized to the lighter one usually works fine. The calculator above runs this for your two weights.
Weighted blankets for kids
The adult rule does not scale down casually. Use the manufacturer’s own children’s chart, respect its minimum age, and make sure the child can push the blanket off without help. Never put one on an infant: the American Academy of Pediatrics’ 2022 safe sleep recommendations advise against weighted sleep products for babies.
If neck or shoulder discomfort is part of what’s disrupting sleep, that’s a separate fix from blanket weight. Our guides to pillows for side sleepers with shoulder discomfort and how often to replace a pillow cover that side of things. And if the tension is really a daytime posture issue that just shows up at night, our posture corrector guide is the more relevant read.
Verdict
Take 10 percent of your body weight, round down to a size that exists if it is your first one, buy it around 48 x 72 inches, and favor glass bead fill. Couples with a big weight gap should buy two individual blankets; couples of similar build can share a queen sized to the lighter partner.
If your sleep problem is the mattress rather than the blanket, see what a mattress topper can and cannot do for your back. Still narrowing down what’s causing the restless nights? Our sleep comfort products guide walks through the fuller triage.
Frequently asked questions
How do I calculate what weight blanket I need?
Multiply your body weight in pounds by 0.10 and round to the nearest size sold, usually 5, 7, 10, 12, 15, 17, 20 or 25 lb. A 160 lb person gets 16 lb and buys 15 or 17. On a first blanket, round down.
What size weighted blanket should I get for a queen bed?
If it is just for you, an individual size around 48 x 72 inches, even on a queen bed. Weighted blankets are made to cover your body, not the mattress. Get a 60 x 80 queen only if two people of similar weight will share it, and size its weight to the lighter person.
Is a heavier weighted blanket always more effective?
No, and going well past the 10 percent guideline usually backfires. A blanket that’s too heavy is hard to move or reposition under, which can make sleep more restless rather than less. If you’ve tried the calculated weight and want more pressure, go up one size step at a time rather than jumping to the heaviest option a brand sells.
Can I use a weighted blanket year-round?
Many people do, though summer use depends heavily on fill type and your own tendency to run hot. Glass bead blankets with breathable cotton covers tend to work better in warmer months than dense poly-fill options, which trap more heat against the body.
How do I know if a weighted blanket isn’t for me?
Some people find the pressure calming within the first few uses; others feel restricted and never adjust to it. If it consistently makes you more restless or too warm after a couple of weeks of honest trying, it’s reasonable to conclude it isn’t the right fit. A weighted blanket is one tool among several, not something everyone responds to the same way.
Do weighted blankets need special washing care?
Most glass bead blankets come with a removable duvet cover that’s machine washable, while the weighted insert itself often needs spot cleaning or a large-capacity washer because of its bulk. Check the care label, since washing a heavy insert in a standard home machine can strain the seams over time.
Sources
- PubMed, Weighted Blanket Use: A Systematic Review (8 studies; possible benefit for anxiety, insufficient evidence for insomnia)
- American Academy of Pediatrics, Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment, Pediatrics, July 2022
From the Relief for Body desk
Every guide here is built from the manufacturer’s own documentation, published safety guidance, and the pattern in what owners report over months of use, not from a lab or a clinic. Nothing is sponsored, and verdicts are settled before any affiliate link goes in. We are not clinicians, and nothing on this site replaces one. How we review explains the process.
This article is general information, not medical advice. If pain is sharp, persistent, or getting worse, see a clinician.
Google lets you pick which sites come up first in your own results.
