A weighted blanket should be roughly 10% of your body weight. So if you weigh 150 pounds, start with a 15-pound blanket. If you weigh 200 pounds, look for a 20-pound option. That said, personal preference plays a real role here, and comfortable weights can range anywhere from 5% to 12% of body weight. Most weighted blankets on the market fall between 5 and 30 pounds.
Finding Your Ideal Weight
The 10% rule is a starting point, not a strict prescription. Some people find that weight too light and prefer something closer to 12% of their body weight, while others feel more comfortable at 7% or 8%. The goal is a blanket heavy enough to create gentle, even pressure across your body without feeling restrictive or making it hard to shift positions during the night.
If you’re between two available sizes, going slightly lighter is generally the safer bet. A blanket that’s too heavy can feel suffocating rather than soothing, and you’re more likely to kick it off in the middle of the night. A blanket that’s slightly under your target weight still delivers noticeable pressure and tends to be easier to adjust to, especially if you’ve never used one before.
Weight Guidelines for Children
For children, the same 10% rule applies, but it functions as a ceiling rather than a target. A child weighing 60 pounds should use a blanket of 6 pounds or less. Weighted blankets should never be used by children under 2 years old. Young children may lack the strength to push a heavy blanket off themselves, which creates a suffocation risk. For older kids, erring on the lighter side and letting them tell you whether it feels like enough pressure is the smartest approach.
Why Blanket Size Matters Too
A blanket’s total weight only tells part of the story. How that weight is distributed depends on the blanket’s dimensions. A 15-pound blanket designed for a twin bed concentrates its weight over a smaller surface area, so it feels heavier per square inch than a 15-pound blanket spread across a queen-size frame. For this reason, most manufacturers recommend choosing a weighted blanket sized to fit your body rather than your mattress. A body-sized blanket keeps all the weight on you instead of letting pounds drape uselessly over the edges of the bed.
If you share a bed, each person is better off with their own weighted blanket rather than splitting a single heavy one. A 30-pound blanket meant to cover two people doesn’t distribute weight the same way two individual 15-pound blankets would, and one partner rolling over can shift the pressure unevenly.
Glass Beads vs. Plastic Pellets
The filling inside a weighted blanket affects how it feels against your body. The two most common fills are glass beads and plastic pellets, and the difference comes down to density. Glass beads are roughly 2.5 times denser than plastic pellets, so a blanket filled with glass needs far less material to hit the same target weight. The result is a thinner, more flexible blanket that drapes closely around your body and feels less bulky.
Plastic pellets are lighter per volume, which means a blanket needs more of them to reach the same weight. This creates a fuller, more cushioned feel. Some people prefer that extra loft, but the tradeoff is a blanket that can feel bulkier and trap more heat. If you sleep warm, glass bead blankets tend to be the cooler option simply because there’s less material insulating you.
Who Should Use a Lighter Weight or Skip One Entirely
Weighted blankets work by adding pressure to your chest and torso, which means your lungs and breathing muscles have to push against that extra resistance with every breath. For most healthy adults, this is barely noticeable. But for people with respiratory conditions like asthma, COPD, or obstructive sleep apnea, that added load can make breathing meaningfully harder, especially during sleep when your breathing is already at its shallowest.
People with muscle weakness or limited mobility face a related concern: if you can’t easily push the blanket off yourself, even a moderately heavy one can feel trapping. The same applies to elderly adults whose strength has declined. One practical workaround is placing a lighter weighted blanket over your legs only, keeping the weight away from your chest entirely while still getting some of the calming pressure effect.
Obesity can compound the issue as well. The chest wall already bears extra weight, and adding a heavy blanket on top increases the total resistance your diaphragm works against. If you have any of these conditions, talking with your doctor before buying one is worth the extra step.
Quick Reference by Body Weight
- 100 pounds: 10-pound blanket
- 120 pounds: 12-pound blanket
- 150 pounds: 15-pound blanket
- 180 pounds: 18 to 20-pound blanket
- 200 pounds: 20-pound blanket
- 250 pounds: 25-pound blanket
These numbers follow the 10% guideline. If you’ve used a weighted blanket before and found it too light, moving up one weight increment (typically 2 to 5 pounds heavier) is a reasonable next step. If you’re new to weighted blankets, starting at or just below 10% lets you gauge your comfort without committing to something that feels overwhelming on the first night.