Can you put a duvet in the washing machine?
By Linen Room. Updated 18 October 2026.
Yes, most synthetic, feather and down duvets can go in a washing machine, as long as the drum is big enough for the duvet to move freely and you dry it completely afterwards. As a rough guide, a single or double duvet needs a drum of at least 8 to 9 kg, and a king or super king needs 10 kg or more. Silk duvets and some wool duvets are dry clean only, so check the care label first.
Key facts
- Most synthetic, feather and down duvets are machine washable; silk and some wool duvets are dry clean only.
- Rough drum guide: 8 to 9 kg for a single or double, 10 kg or more for a king or super king.
- Drying is where it goes wrong: a double feather duvet can need two to three hours on low heat.
Check the care label first
The label tells you three things: whether the duvet is washable at all, the maximum temperature, and whether it can be tumble dried. Synthetic duvets usually allow 40 to 60°C. Feather and down are often 40°C. Wool is usually a cold wool cycle or dry clean. Silk is almost always dry clean only.
If the label has been cut off, treat a natural-fill duvet as feather and down (gentle, 40°C) and a synthetic one as 40°C to be safe.
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The weight of a duvet is not the problem; the bulk is. A king-size duvet stuffed into a standard drum cannot turn over, so water and detergent do not reach the middle, and the rinse cannot get the soap back out. A simple test: once the duvet is in, you should be able to fit your hand flat between it and the top of the drum.
If it does not fit like that, a launderette with large-capacity machines, or a professional service, will do a better job than forcing it.
How to wash it
Use a small amount of liquid detergent, around half the usual dose, because duvets trap soap. For feather and down, use a down wash rather than biological detergent. Choose a gentle or duvet programme, add an extra rinse if your machine has one, and use the highest spin the label allows to get water out before drying.
Drying is the part that goes wrong
A duvet that feels dry on the outside can still be damp in the middle, and damp filling smells within a couple of days. Tumble dry on low heat with two or three dryer balls (or clean tennis balls) to break up clumps, and stop every 30 minutes to shake it out. A double feather duvet can take two to three hours.
If you cannot tumble dry, hang it flat over two lines in the sun and turn it regularly, and expect it to take a full day or more. Do not put a damp duvet back on the bed.
When it is not worth doing yourself
If your machine is too small, you have no tumble dryer, or the duvet is a good feather and down one you do not want to risk, a professional clean is usually the better call. Our duvet cleaning starts at £25 including the full dry, with collection in London.
Related guides
Questions
Good to know
Can I wash a king size duvet in a 9 kg machine?
Usually not well. A king duvet needs room to turn over. In a 9 kg drum a synthetic king may just fit, but it often comes out with dry patches of detergent in the middle. 10 kg or more is safer.
What temperature should I wash a duvet at?
Follow the label. Synthetic duvets are typically 40 to 60°C, and 60°C is what kills dust mites. Feather and down are usually 40°C on a gentle cycle.
How often should I wash my duvet?
Every six to twelve months, or more often if you have allergies or pets on the bed.
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