The 10% Rule: How Heavy Should a Weighted Blanket Be?
Experts recommend choosing a weighted blanket that weighs about 10% of your body weight. This provides gentle, evenly distributed pressure — called deep pressure stimulation — that helps reduce stress and promote deeper sleep. A comfortable range is 8-12% depending on personal preference. The weighted blanket calculator above applies this rule to your own weight and then rounds it to a size you can actually buy:
- 8-9% — lighter: better if you sleep hot, move a lot, or are new to weighted blankets
- 10% — the standard starting point most people find ideal
- 11-12% — heavier: firmer pressure for people who want a stronger "hug" feel
Worked example: a 150 lb person: 150 × 0.10 = 15 lbs recommended, with a range of 12-18 lbs. Most retailers sell blankets in 5 lb increments (10, 15, 20 lbs), so a 15 lb blanket is the natural pick.
Weighted Blanket Weight Chart
Find your body weight along the bottom, then read up to the line — that is 10% of your weight. The shaded band is the comfortable 8–12% zone, and the four markers sit where the line lands on the standard retail weights that blankets actually come in.
| Body weight | Recommended blanket | Best retail pick |
|---|---|---|
| 80–100 lbs (36–45 kg) | 8–10 lbs (3.6–4.5 kg) | 10 lb (4.5 kg) |
| 100–120 lbs (45–54 kg) | 10–12 lbs (4.5–5.4 kg) | 10 lb (4.5 kg) |
| 120–140 lbs (54–64 kg) | 12–14 lbs (5.4–6.4 kg) | 15 lb (6.8 kg) |
| 140–160 lbs (64–73 kg) | 14–16 lbs (6.4–7.3 kg) | 15 lb (6.8 kg) |
| 160–180 lbs (73–82 kg) | 16–18 lbs (7.3–8.2 kg) | 20 lb (9.1 kg) |
| 180–200 lbs (82–91 kg) | 18–20 lbs (8.2–9.1 kg) | 20 lb (9.1 kg) |
| 200–250 lbs (91–113 kg) | 20–25 lbs (9.1–11.3 kg) | 25 lb (11.3 kg) |
| 250–300 lbs (113–136 kg) | 25–30 lbs (11.3–13.6 kg) | 25 lb (11.3 kg) |
Stuck between two weights? Round down if you sleep hot, move around a lot, or are new to weighted blankets — a blanket that is slightly too light is far easier to live with than one that pins you down. Round up only if you already know you want firmer pressure. Anything above 35 lbs (16 kg) is not recommended.
What Weight for a Couple?
Worth knowing up front: there is no single standard for couples. Published guidance spreads from about 7.5% to 15% of combined weight, and most sources land on 7.5–10% — manufacturers rarely publish couples-specific numbers, which is where the spread comes from. Two workable strategies:
- One shared blanket — start at 7.5–10% of combined weight. Example: 150 + 140 = 290 lbs → 22–29 lbs. Two caveats: it needs to be king-sized to cover both of you, and because the same weight spreads over a larger area it feels lighter per person than it would on a twin.
- Two separate blankets — each of you uses your own 10%. Usually the better answer when one person sleeps hot, moves a lot, or wants firmer pressure. Two twins side by side is the most flexible setup.
For coverage, see the size table; if you are buying for a child, read the kids section first — the rules there are stricter.
Weighted Blankets for Kids
Children need extra care. Use 10% of the child's weight + 1-2 lbs as a starting point, and always consult a pediatrician first. Critical safety rules:
- Never use weighted blankets for babies under 2 years — suffocation risk
- Start with short, supervised daytime sessions
- Children need to be able to remove the blanket on their own
- Typical kids' blankets: 3-8 lbs (1.5-4 kg)
Choosing the Right Blanket Size
| Bed / sleeper | Blanket size | Coverage |
|---|---|---|
| Single sleeper (≤130 lbs) | Twin (48" × 72") | Shoulder to knee |
| Single sleeper (130+ lbs) | Full / Queen | Full body |
| Couple | Queen / King | Lateral coverage |
Weighted blankets are often slightly shorter than regular doonas — the weight should stay on your body, not hang over the floor.
Frequently Asked Questions
How heavy should a weighted blanket be?
About 10% of your body weight as a starting point, with a comfortable range of 8-12%. A 150 lb person typically uses a 15 lb blanket.
Is the 10% rule accurate?
It's the industry standard starting point. Adjust by 1-2 lbs based on how it feels — hot sleepers often prefer lighter, firmer-pressure fans prefer heavier.
What weight for a couple?
There is no single standard — published guidance ranges from about 7.5% to 15% of combined weight, and most sources land on 7.5–10%. For 150 + 140 lbs (290 lbs combined) that is roughly 22–29 lbs for one shared blanket.
Should we share one blanket or use two?
Two separate blankets are usually better when your preferences differ (one sleeps hot, one moves a lot) — each person then gets their own exact 10%. A shared blanket needs a king size to cover both, and it feels lighter per person because the weight spreads over more area.
What size weighted blanket for two people?
At least a queen, ideally a king (about 76 × 80 in / 193 × 203 cm). A throw or twin covers only one person; two twins side by side is the most flexible option if you want individual weights.
Is a weighted blanket safe for children?
10% of the child's weight + 1-2 lbs, with pediatrician approval. Never for babies under 2. Start with short supervised sessions.
What's the maximum safe weight?
35 lbs (16 kg) is generally the max. Consult a doctor if you have respiratory issues, mobility problems, or claustrophobia.
Do weighted blankets help with sleep?
Deep pressure stimulation can reduce cortisol and boost serotonin/melatonin, helping many people fall asleep faster. Results vary by individual.
Pair it with the rest of our sleep toolkit — bedtime timing, caffeine cutoff, and sleep debt all affect whether a blanket actually helps.
Methodology & sources: The 10% rule (8-12% range) is the industry standard per weighted blanket manufacturers and occupational therapy guidance. Couples guidance is presented as a range (7.5-15% of combined weight) because published sources disagree. Safety guidance (35 lb max, no use under 2 years) follows common manufacturer and pediatric recommendations. Always consult a healthcare professional for individual advice.