Guide

What washing machine capacity do you need?

Choose washing machine capacity by household size, laundry habits and space first, then compare Samsung 9kg and 10kg AO examples on value and fit.

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Last verified: 2026-10-12

How washing machine capacity is measured

AO defines washing machine drum capacity as the maximum amount of clothes the machine can hold, so the kg rating is really a load-size guide rather than a feature for its own sake. In practical terms, a 10kg model such as the Samsung Series 5 AI Energy WW10FG5U34ABEU sits above the two 9kg Samsung examples, which gives you more room for bigger washes. That makes capacity the first filter, but it still needs to be checked alongside how often you wash, what you wash, and whether the machine will fit your space.

Which size suits singles, couples and families

AO’s size guidance is a useful starting point: up to 6kg for 1–2 people, 7–9kg for 3–4 people, and 10kg+ for 5–6 people. AO also says 7kg suits small households, while 9–10kg is aimed at medium to large families, which puts the Samsung 9kg and 10kg shortlist models in the right band for bigger everyday loads. If your washing is mostly lighter and less frequent, a smaller drum can still make sense, but once bedding, towels and school or sports kit build up, the larger end of the range becomes easier to live with.

When a bigger drum is worth it

A bigger drum can be worth paying for if you often wash bedding, towels or bulky items, because you may be able to fit more into fewer loads. On this shortlist, that matters when comparing the £429 Samsung Series 5 AI Energy WW90CGC04DAB, the £479 Samsung Series 5 AI Energy WW90CGC04DAE and the £549 Samsung Series 5 AI Energy WW10FG5U34ABEU 10kg model. The extra cost only makes sense if the larger drum better matches your routine, so think about load frequency and what you regularly have to wash rather than treating the price gap as capacity alone.

Other specs that matter alongside capacity

Capacity is the starting point, but AO also advises checking dimensions and clearance so the machine actually fits the space you have. Energy rating matters too, with A the most efficient rating, so it is worth comparing running-cost positioning rather than assuming the biggest drum is automatically the best value. A 1400 rpm spin speed is a sensible all-round reference, while quick wash, eco cycles and smart features can be useful extras if they suit your routine; they should come after fit, size and efficiency, not before them.

What the shortlist evidence says

The visible shortlist is narrow but useful: three Samsung freestanding washing machines, all with a 4.8 average rating and review counts shown up to 3,121. The prices run from £429 to £549, with two 9kg models at £429 and £479 and one 10kg model at £549, so the comparison is as much about value and size as it is about brand. Because the star rating is identical across the set, the depth of reviews matters more than the average score here, but the retailer review figures still need to be treated as retailer-hosted feedback rather than independent lab proof.

How to choose between 9kg and 10kg

For most shoppers on this shortlist, the main choice is whether the 10kg Samsung or one of the 9kg Samsung models better fits the household size and laundry volume. If you regularly wash bulkier loads and want extra headroom, the 10kg WW10FG5U34ABEU aligns more closely with AO’s larger-household guidance, but if your loads are more moderate, the 9kg WW90CGC04DAB or WW90CGC04DAE may offer better value at £429 or £479. Check the dimensions, installation type, energy rating and any delivery or installation charges on the retailer page before deciding, because the right model is the one that fits both your space and your routine.

Electricals to use as comparison examples

Available Samsung Series 5 AI Energy WW10FG5U34ABEU 10kg Washing Machine with 1400 rpm

Samsung · Washing Machines · Freestanding

Samsung Series 5 AI Energy WW10FG5U34ABEU 10kg Washing Machine with 1400 rpm

from £549.

£549

Rated 4.8 / 5 from up to 3,121 reviews

Colours tracked: Black

Available Samsung Series 5 AI Energy WW90CGC04DAB 9kg Washing Machine with 1400 rpm

Samsung · Washing Machines · Freestanding

Samsung Series 5 AI Energy WW90CGC04DAB 9kg Washing Machine with 1400 rpm

from £429.

£429

Rated 4.8 / 5 from up to 3,121 reviews

Colours tracked: Black

Available Samsung Series 5 AI Energy WW90CGC04DAE 9kg Washing Machine with 1400 rpm

Samsung · Washing Machines · Freestanding

Samsung Series 5 AI Energy WW90CGC04DAE 9kg Washing Machine with 1400 rpm

from £479.

£479

Rated 4.8 / 5 from up to 3,121 reviews

Colours tracked: White

Retailer details used

Last checked 2026-10-12. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.

Firmness questions

Is a 9kg washing machine too big for two people?

Usually not. AO’s guidance puts 7–9kg in the range for 3–4 people, so a 9kg drum can suit two people if you wash bedding, towels or bulkier loads regularly. If you mainly wash smaller, lighter loads, a smaller drum may be a better fit for daily use.

Does a bigger capacity washing machine cost more to run?

Not necessarily in a simple way. Larger drums can use more power per cycle, but a well-matched machine may let you do fewer washes overall, so it comes down to capacity, energy rating and how full you usually load the drum. Check the latest A–G rating on the retailer page.

What spin speed should I look for?

A 1400 rpm spin speed is a solid all-round benchmark because it removes more water from clothes and can help shorten drying time. If you are comparing Samsung models, it is a sensible spec to pair with the right drum size, rather than a reason to choose a machine on its own.

How do I know whether a 10kg machine will fit my space?

Measure the area carefully and allow for clearance, hoses and door swing, not just the cabinet width. AO specifically advises checking dimensions before buying, so confirm the latest product dimensions and installation requirements on the retailer page before ordering.

Should I choose the cheaper 9kg model or the pricier 10kg model?

Choose the 10kg model if your routine regularly includes bigger loads, bedding or towels and you want more headroom. If your loads are usually moderate, the cheaper 9kg Samsung at £429 may be better value than paying £549 for capacity you will not use often.