Yes, if the care label allows it and your washer has enough room. A cramped comforter won't rinse clean and can strain the machine.
Comforters are bulky enough that the real obstacle usually isn't whether they're washable, it's whether your machine is big enough to do the job. A queen or king comforter crammed into a standard home washer often comes out only half-rinsed.
Down and down-alternative fills behave differently once wet, too, which changes both the wash settings and the drying time you should plan for.
A standard top-load or front-load home washer, roughly 3.5 to 4.5 cubic feet, can usually handle a twin or full-size comforter. Queen and king comforters often need a large-capacity machine, which most laundromats have. If the comforter fills more than about two-thirds of the drum, it needs more room, not a squeeze.
Use cold or warm water on a gentle cycle, with a mild liquid detergent, since powder detergent can leave residue trapped in the fill. Skip fabric softener, which can reduce the fill's loft over time. Adding a couple of clean tennis balls or wool dryer balls during the wash, not just the dry cycle, can help redistribute fill so it doesn't clump.
Down comforters need extra care — clumped wet down takes far longer to dry and can develop a musty smell if it stays damp. Synthetic fill dries faster and tolerates machine washing more forgivingly, but both types should skip high heat in the dryer, which can damage the fill and the shell fabric.
Dry on low heat and expect 1.5 to 3 hours, checking and fluffing every 30 minutes to break up clumps. Wool dryer balls help here too. The comforter should feel completely dry, including inside the seams — a slightly damp comforter stored on a bed can mildew within days.
Most comforters are machine washable, but the size of your washer decides whether the wash actually gets them clean. When home machines are too small, a laundromat's large-capacity washer is worth the trip.
About every 2 to 3 months for the comforter itself, assuming it's protected by a duvet cover. Without a cover, washing monthly is more realistic.
Yes, if your washer is large enough, but expect a much longer drying time and check that it's fully dry throughout to prevent mildew.
Clumped fill traps moisture in the center. Fluffing it by hand every 30 minutes and adding dryer balls helps distribute heat and speeds drying.
Yes, and it's often the better option for queen or king sizes, since laundromat washers have the extra capacity needed for a full rinse.