The Drawer Audit Calculator

Most men own the wrong number of pairs and have no idea which way. The arithmetic is not complicated, but almost nobody does it, because underwear gets replaced by accident rather than on purpose. This works out the number you need from the only figure that matters, which is how long you genuinely go between washes, and then compares it with what is actually in the drawer.

Be honest about the laundry. Use your last few real washes, not the routine you keep meaning to start.

Why the number is what it is

The base figure is the number of days between washes, because that is the longest stretch you have to cover without the machine bailing you out. Then three more. One for the day that needs a mid afternoon change, one for the wash that slips by a day because life happened, and one for the pair sitting in the machine at the moment you are counting. Men who skip the plus three are the ones doing an emergency wash at eleven at night twice a year.

Sport and hot work are added as changes rather than as days, because a man who trains four times a week needs four extra pairs in the cycle whether or not those are four separate days. Travel gets its own small reserve for the same reason: a trip takes pairs out of the house and they do not come back clean.

The waistband test is the part most people skip, and it is the part that decides whether the number in your drawer is real. Elastic dies long before cotton does, and a pair whose waistband has gone is not a spare, it is a pair you will be uncomfortable in all day. Counting those as stock is how men end up owning twenty pairs and wearing the same six.

What to do with the answer

A shortfall is the easy case. Buy the difference in one order, in one style you already know fits, and stop treating underwear as something you pick up while you are somewhere else buying socks. Replacing a whole rotation at once also means the pairs age together, which makes the next audit far simpler than one where every pair is a different vintage.

A surplus is more interesting. If you have more serviceable pairs than you need, the cycle between washes is longer than it needs to be, which means every pair is spending months at the back of the drawer doing nothing. That is not free. Elastic ages on the shelf as well as on the body, so a deep reserve of unworn pairs is a slow write off rather than a saving.

Either way, the audit is worth repeating once a year. The full argument for why, and how to retire a pair without feeling wasteful about it, is in The Drawer Audit, and the case for buying fewer, better pairs is made in Buy It Once.

Questions people ask

How many pairs of underwear should a man own?

Take the number of days between your laundry cycles and add three, then add one for each extra change you make in a normal week. Washing weekly, that is around ten everyday pairs for a man who does not train, and closer to fourteen for one who does. The plus three covers a day that needs a mid day change, a wash that slips, and the pair in the machine while you are counting.

How do you know when to throw underwear away?

Judge the waistband, not the fabric and not the calendar. Stretch it about ten centimetres and let go: it should snap back immediately and completely. If it returns slowly, stays wavy, or the band has started to roll or twist in wear, the garment has stopped doing its job however good the cotton still looks. Thinning at the seat, a leg opening that curls, and a gusset that has gone hard are the other three signals.

Is it bad to own too much underwear?

It is not harmful, but it is wasteful in a way most men do not expect. Elastic degrades with age as well as with wear, so pairs kept in reserve for years lose their recovery in the drawer without ever having been useful. A deep unworn stock also hides the age of your rotation, because pairs enter service at wildly different points. A rotation sized to your actual laundry cycle wears out evenly and gets replaced on purpose.

Should you count sports underwear separately?

Yes. Sports pairs and everyday pairs do different jobs and usually want different fabrics, so mixing them in one count hides a shortage in both. Work out the everyday number from your laundry cycle, then add a separate small block for training, sized to the number of sessions you do between washes. Kit that sits in a bag overnight also needs washing sooner, which is another reason to keep the two stacks apart.