Affiliate disclosure

Some links on this site are affiliate links. If you buy through them we may earn a small commission, at no extra cost to you. It never changes what the calculator recommends – recommendations are sized to your household, not to the commission.

As an Amazon Associate we earn from qualifying purchases.

How we choose products

• The calculator decides what size of item your household needs first. Product suggestions are then matched to that size – we suggest the smallest option that does the job, not the most expensive.
• Affiliate links carry rel="sponsored" so search engines know they are paid links.
• We do not link to infant formula or medicines.
• Prices, where shown, come from the retailer’s own data feed and may change. Always check the price on the retailer’s site before you buy.