You're standing in the shop, or scrolling through a website, and you do the sum everyone does. A box of disposable pads costs a few pounds. A set of washables costs more, but you can keep using them. So which is the smarter buy?
And then you get stuck. Because one review swears washables work out far cheaper, and the next one says you're sorted with disposables for the price of a couple of coffees. Both sound completely sure of themselves. One person went for the planet, another for the convenience, and nobody shows you the actual maths.
That maths does exist. It has two variables you don't yet know on the day you buy, which is exactly why it can fall either way. This piece gives you the formula nobody gave you, three honest examples to see yourself in, and the hidden costs that appear in no comparison anywhere. By the end you'll know what's right for your situation.
Why "cheap per pad" sends you down the wrong path
The price on the box is a trap. Not because it lies, but because it answers the wrong question.
A mother worked it out on a forum, down to the penny: "Medela disposables are about £7 for thirty, so fifteen pairs, and that lasts me maybe three or four days. It's going to get really expensive." Look at what happens there. The price per pad is low. The price per week is not, because she gets through them fast. That same box that looked like a bargain on the shelf is gone in four days.
That's the heart of it. You never work out disposables per pad. You work them out per day, times the number of days you breastfeed. And almost nobody knows that number in advance.
Another mother in the same thread wondered whether dearer really meant better: "Avent and Medela are pretty pricey and honestly I don't think they catch any better." That counts too. If you're paying for the brand and not for better catching, you pay twice: a higher price per pad, and just as many changes.
The only sum that actually works
Cost per use is not the price divided by the number of pads in the pack. It's the price divided by the number of times a pad actually keeps you dry, across your whole feeding period.
For disposables it's simple: every pad is one use. For washables you divide the purchase price by all the times you wash them and wear them again. A washable pad you wear every other day for a year goes through hundreds of uses. The price per time drops to a few pence.
Two things decide which way the sum falls, and they're exactly the two things you don't yet know on the day you buy.
- How long you feed. Washable is money up front that only pays you back over time. A mother put the condition without naming it: "In the end it's better for your purse, as long as you keep breastfeeding for a while." Stop after six weeks and you may not have earned the purchase back. Feed for a year and washable is almost always cheaper.
- How much you leak. Leaking a lot means changing a lot. With disposables that means more pads every day, and more money. With washables it means you need more sets to keep up with the laundry, so the purchase cost quietly doubles or trebles. How much you leak isn't a reliable measure of your milk supply: it says more about your let-down reflex and how full your breasts get between feeds.
Put those two side by side and you can see why the reviews contradict each other. The mother who wrote that washables are cheaper fed for a long time and leaked heavily. The mother who was sorted with disposables for the price of a couple of coffees either leaked very little or stopped early. They're both right for their own situation. They're just not doing the same sum.
Three honest worked examples
Numbers vary by brand and by shop, so read these as direction, not exact prices. Reckon on roughly 10p to 40p per disposable pad (supermarket own-brand cheap, Medela or Lansinoh dear) and on £25 to £45 for a workable starter set of eight to twelve pairs of washables. Then fill in your own situation.
| Little leaking, short feeding | Average leaking, six months | Heavy leaking, long feeding | |
|---|---|---|---|
| Changes | 1-2 a day | 6-8 a day | 8-12 a day |
| Length | ~6 weeks | ~6 months | ~12 months |
| Disposable total | roughly £8-20 | roughly £130-260 | roughly £400-800 |
| Washable total | £25-45 (plus washing) | £35-55 (plus washing) | £70-110 (more sets, plus washing) |
| Winner | disposable | washable, comfortably | washable on price |
Read the three columns as three different mothers.
Little leaking and short feeding. Here a set of washables won't earn itself back. You're cheaper off with a couple of boxes of disposables, and you're not left with a drawer full of pads you've washed fewer than ten times. A mother who used very few kept it simple: a handful and done.
Average leaking and six months of feeding. This is where washable clearly wins, by a distance. Six hundred disposable pads over half a year add up hard, while one set of washables goes the whole way. The outlay feels steep on day one and is worth it again within a few weeks. "Because I used them so much and for so long, it was worth it," one mother wrote afterwards.
Heavy leaking and long feeding. On price, washable wins here too, and by a lot. But this is where the catch sits. With heavy leaking and washing every other day, you won't manage on eight pairs. You need so many that the outlay doubles or trebles, and the washing becomes a daily job you don't always keep on top of. One mother described exactly that: she got through them so fast she couldn't keep up with the laundry. This is the situation where the loose pad, washable or disposable, reaches its limit. More on that further down, and in full in nursing bra or breast pads: what actually stops you leaking through.
The hidden costs nobody adds up
The comparisons you find online stop at the purchase price. Underneath sit three costs only washables have, and they hide in exactly the things mothers mention themselves without adding them up.
You need more sets than you think, because of drying time. Washable pads made of cotton or bamboo dry slowly, especially a thick bamboo version indoors in winter. A set that's still drying is a set you can't wear. So you buy a second, sometimes a third, to always have a clean pair ready. That isn't a luxury, it's a requirement, and it's in no price comparison. And there's a second one, less well-known: many washable pads only soak up properly after they've been washed a few times. "You have to wash them at least three times before you use them, only then do they really take up any moisture," one mother wrote. On an English-language forum that breaking-in ran to about ten washes for bamboo. So they're at their weakest in exactly the first weeks, when you leak the most.
The daily wash costs something too. If you leak every day, you wash every day or every other day. Most care labels ask for a warm wash, often 60 degrees for hygiene. That's water, energy and time. Put them on in a small load of their own and it's an expensive habit. Add them to a wash that's running anyway and it disappears. One mother did exactly that and found it simple: she dropped a few in her daily laundry basket and that was that. So the cost isn't in the washing itself, but in whether you run it separately or not.
One tube of nipple cream can ruin a whole set. This is the priciest hidden cost and the least known. Greasy lanolin-based nipple cream soaks into the fibres of a washable pad and lays down a film that actually repels moisture. From then on they stop absorbing, and you can't wash it back out. "I trashed some bamboo ones by using lansinoh on them," one mother wrote: a set binned by one product you use a lot in exactly those early weeks. If you use nipple cream, keep cheap disposables to hand alongside it and save your washables for the times without cream.
What "sustainable" actually means with daily washing
For most mothers sustainable is a feeling, not a figure. Disposables feel wasteful, especially when you watch a pile of full pads go in the bin. Washables feel good. But with daily use it's a touch more nuanced than "washable is green and disposable isn't".
Disposable pads are single-use waste, and it mounts up. Two to eight a day, month after month, each often with a plastic layer on the outside that won't compost. Over a year of heavy leaking you're soon talking about more than a thousand pads in the bin. That's the waste mothers mean when they say it makes them uncomfortable.
Washable shifts that load from the bin to the washing machine. And there are two things there that nobody tells you. The first: the material matters. Washable pads made of polyester or other synthetics shed microplastics with every wash, which end up in the waste water. Pads made of cotton or bamboo don't, or far less. If you genuinely want the sustainable choice, you look not only at washable versus disposable, but also at natural material versus synthetic. The second: how you wash. Running a clean set on its own at 60 degrees every day costs water and energy. Adding them to a wash that's full anyway costs almost nothing extra.
So sustainable with daily use means, in concrete terms: choose cotton or bamboo over polyester, wash them in with the rest instead of separately, and use them long enough to earn back the making of them. A set you wear for a year and then pass on is the sustainable choice. "Used for over a year and passed them on to a friend," one mother wrote, and that is what really makes a washable pad sustainable: the number of times it gets worn.
And don't let guilt get to you. Someone wrote that she felt "less bad" about changing often because it made no waste, and that's exactly the wrong reason to load something onto yourself. Choose what fits how much you leak and how long you feed. A mother who gets through the day better with disposables is doing nothing wrong. More on the types themselves and where each one breaks is in breast pads: which ones do you actually need.
When this stops being a money question and becomes a medical one
The choice between washable and disposable is about money, convenience and skin. A few things don't belong on that list and need someone to take a look. Get in touch with your GP, your midwife or health visitor, or a lactation consultant if you have:
- a fever or a fluey, run-down feeling alongside a breast problem;
- a red, warm, painful patch or a hard area in your breast, especially if you feel yourself getting more unwell quickly. That can point to mastitis, inflammation of the breast, usually from a build-up of milk, which can sometimes lead to an infection;
- a hard spot or lump that doesn't shift after a feed or after a few days;
- cracked, bleeding or split nipples that don't heal. Using nipple cream for that is fine in itself, but nipples that stay sore or damaged usually come down to the latch or positioning at the breast, and that is where the fix is;
- nipple discharge that's bloody, an odd colour or smells strange, from one breast and not linked to cracked nipples.
Support with feeding itself comes from a lactation consultant. In the UK that usually runs through your midwife, your health visitor or your GP surgery, and you can call the National Breastfeeding Helpline on 0300 100 0212 or find a qualified lactation consultant (IBCLC) through the Lactation Consultants of Great Britain register. A pad, whichever you choose, keeps your clothes dry and nothing more. It won't fix a medical problem, and it should never mask one.
The third option that rewrites the sum
Back to the mother with heavy leaking and a long feeding period. On price washable wins for her, but she's left with more sets than she wants, a daily wash she doesn't keep up with, and pads that show under a fitted top. Another mother summed up that pile of complaints in one line: "I didn't get on with them, you could see them more than the disposables under a tight summer top, and they leaked through on me just as badly." Cheaper or dearer wasn't even the point for her. The loose pad itself was the problem.
Because look at everything you have to feed into the sum with a loose pad: the price per pad or the outlay, the extra sets for the drying time, the daily wash, and the shifting, showing, leaking-through reality of it. A nursing bra with built-in absorbency takes that whole variable out of the comparison. There's no loose pad to change, straighten, wash separately or buy twice because the first set is still drying.
We built our nursing bra for exactly that reason. The absorbent layer is built into the cup, in four layers that each do one thing: an inner layer that wicks moisture away from your skin, a core that holds it and catches up to 30 ml per cup (60 ml per bra, about two saturated standard pads), a barrier that protects your top, and a soft outer layer. It's wireless, opens one-handed with the clip, and is knitted from an OEKO-TEX Class I certified fabric (certificate number 11-36224), the strictest category: for textiles allowed against a baby's skin. Designed in Belgium, knitted in Türkiye.
On the sum that means: one purchase instead of a monthly re-buy or a drawer full of spare sets, and nothing extra to wash separately. If you only leak a few drops in the day, a handful of washable pads will see you right and you need nothing else. If you feed for a long time, leak heavily, or come unstuck on the nights and the washing, this is the option that rewrites the whole sum: see the nursing bra. How to manage heavy leaking through, washable or not, is covered separately in managing heavy leaking. And the full overview of nursing bras, fit and comfort is in the overview of this guide.
Frequently asked questions
Are washable breast pads really cheaper than disposables?
Usually yes, but only if you feed for a while. Washable is a cost up front that pays back over the months. Feed for just a few weeks, or barely leak, and you're cheaper off with disposables. Feed for six months or more with average to heavy leaking, and washable is almost always a good deal cheaper, despite the extra sets and the washing.
How many washable breast pads do I need?
Reckon on eight to twelve pairs if you wash every other day, and more if you leak heavily. Washables dry slowly, bamboo especially, so you always need a clean set while another is drying. Wash them a few times before your due date, because many washable pads only soak up properly after about three washes.
Can you wash washable breast pads at 60 degrees?
Most care labels do ask for a warm wash, often 60 degrees for hygiene. Don't use fabric softener: it lays a film on the fibres that repels moisture and lowers absorbency. Best to run them in with a wash that's full anyway, so it costs almost no extra water or energy. A separate load for a few pads is an expensive habit.
Are washable breast pads better for the environment?
With long use, yes, because you replace hundreds of disposables with one set. But two things decide how sustainable it really is: choose cotton or bamboo over polyester, because synthetic pads shed microplastics into the wash water, and wash them in with the rest rather than separately. A set you wear for a long time and then pass on is the most sustainable choice.
Can nipple cream ruin my washable breast pads?
Yes. Greasy lanolin-based nipple cream soaks into the fibres and lays down a film that repels moisture. After that they stop absorbing properly, and washing won't get it out. If you use a lot of cream in the early weeks, keep cheap disposables to hand alongside it and save your washables for the times without cream.
Read on in this guide
- Which nursing bra is truly leak-proof?
- Night leaking: what to wear in bed?
- When does leaking stop for most mothers?
- How to measure your nursing bra size again
