Find the complete model number and use its manufacturer specification to identify the listed capacity. Cabinet width, a family name or a hand-measured tub estimate doesn’t verify the advertised cubic-foot rating.
Start with the full model, including its suffix
Use the field marked model on the appliance label. Keep it separate from the serial number and a name such as a product series. The model-number guide helps locate and copy it safely.
Don’t move a heavy connected washer alone or open panels just to find a capacity figure. If the label is unreadable, ask the maker to help establish the actual model before assigning a specification.
Find the matching manufacturer specification
- Use the maker’s support or product-record route for the full model and market.
- Match the identifier shown on the specification sheet or product record to the appliance. Don’t substitute a similar suffix or photograph.
- Look for the listed washer capacity and its unit. Record the figure, full model and source together.
- If documents disagree or a shared family sheet doesn’t clearly identify your variant, ask the maker to resolve it. Keep capacity unresolved until it does.
A seller’s listing can help locate a record, but retain the matching manufacturer source for the number you use.
Capacity and outside dimensions are separate
Whirlpool notes that washers with similar outside dimensions can have different internal capacities. For example, the checked 2020 Maytag sheets list MHW5630HC/HW at 4.5 cu. ft. and MHW6630HC/HW at 4.8 cu. ft., both 27 inches wide. Width alone cannot choose between those ratings.
Use cabinet dimensions, open-door access and installation requirements for physical fit. Use the documented capacity and owner instructions for the laundry decision. Don’t multiply outside height, width and depth to calculate the rated wash capacity.
Label a measurement estimate honestly
A hand measurement of the tub or a geometric volume calculation isn’t a verified manufacturer rating. If you keep such an estimate for your own comparison, label it as an estimate and retain the actual recorded measurements. Don’t substitute it into a product listing as the official capacity.
If a record uses a different unit or type of load rating, preserve it as written. Don’t invent a fixed conversion between a laundry weight limit and a cubic-foot capacity.
A capacity number doesn’t approve every item
Check the item’s care label and the washer’s actual loading instructions for blankets, pillows or other bulky items. A number alone doesn’t establish that a particular item can move correctly, be washed safely or use the intended cycle.
If you’re comparing washers, keep each full model, listed capacity, installation fit and complete offer together. This guide doesn’t turn a tub size into a universal towel count or household-size requirement.
Sources and applicability
- Whirlpool: washer capacity and size: General distinction between cabinet size and capacity; no universal item loading or household-size promise.
- MHW5630H manufacturer feature sheet, 2020: MHW5630HC/HW as listed in2020 feature sheet; dimensions explicitly for planning only.
- MHW6630H manufacturer feature sheet, 2020: MHW6630HC/HW as listed in2020 feature sheet; no current stock or complete installed clearance claim.
Reviewed October 17, 2026. Exact-model records govern; no current stock, universal performance ranking or internal service procedure is supplied.