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Buyer tools · 3 free calculators
Sticker price hides two things: how long a product actually lasts, and what unit you're really paying for. These two calculators strip both away and show the number that actually matters — before you click buy.
The three tools
Open any card to see exactly what it computes and the problem it solves.
Enter price and expected uses for up to four options — including upkeep costs like batteries, refills, or dry cleaning. The calculator divides total cost by total uses and ranks every option by real cost, not sticker price.
Enter price, size, and unit for any two package sizes — even in different measurements. The calculator converts both to a shared unit and shows which one is actually cheaper per ounce, gram, or liter.
Log what you bought and each retailer's return window. The dashboard tracks every deadline and totals the capital sitting in items you could still send back — so a return window never quietly closes on you.
"Will this last me long enough to be worth it?" That's Cost Per Use — for comparing items of different quality or durability, like a cheap umbrella that breaks in a month against an expensive one that lasts five years.
"Is this pack actually the better deal?" That's the Unit Price Comparator — for comparing the same product in different sizes, where the only real question is price per unit, nothing else.
Mix them up and you'll get an answer to the wrong question. A bulk pack of something you'll use once isn't a deal at any unit price.
Worth knowing
Bulk packaging carries its own cost, and not every retailer passes the saving on. Checking the actual unit price takes seconds and occasionally proves the smaller pack wins.
One brand prices per fluid ounce, another per gram, a third per "serving." Converting everything to one shared unit is the only way to see which is actually cheaper.
Batteries, refills, subscriptions, and cleaning costs belong in the comparison, not as an afterthought discovered three months in.
A product built to last ten years is only a better deal if you'd keep using it for ten years. Match the comparison to how you actually live, not the best-case scenario on the box.
FAQ
Use Cost Per Use when comparing a cheaper item against a pricier one that lasts longer. Use the Unit Price Comparator when comparing package sizes of the same product. Use Smart Return & Capital Dashboard to track return deadlines on anything you've already bought.
No. Both calculators work instantly with numbers you type in. Nothing is saved, tracked, or sent anywhere.
Yes, completely free, with no signup and no usage limits.
Retailers don't always discount bulk sizes — sometimes the smaller pack is on promotion, or the bulk size uses a different base unit that hides the comparison. The Unit Price Comparator normalizes both to the same unit so the discount claim can actually be checked.
Any reasonable, consistent unit: wears for clothing, applications for skincare, loads for a kitchen appliance, months for a subscription. Pick one definition and apply it to every option you compare.