Fair price per 1 kg or 1 liter.
Compare savings in 5 seconds.
An 870 ml bottle or 1 liter? A 180 g butter pack or 200 g? Enter the price and quantity in grams, milliliters, or items — the calculator instantly computes the true unit price per 1 kg or 1 liter, highlights the best deal, and reveals the exact percentage difference with zero mental math.
How sneaky marketing makes you overpay
Manufacturers rarely raise prices outright — they quietly downsize the package weight or volume instead.
- • Misleading package sizes: an 870 ml bottle priced slightly lower looks cheaper than a 1000 ml bottle, even though its per-liter cost is significantly higher.
- • The bulk-buy illusion: “Family packs” or promo bundles often cost more per unit than standard single packages.
- • Tedious calculations: dividing prices by odd weights like 730 grams in a standard calculator app is slow, clumsy, and error-prone.
- • Common denominator: instantly converts any weight, volume, or count into a true unit price per 1 kg, 1 liter, or single item.
- • Instant verdict: the best value option is immediately highlighted in green, while other products display the exact % you overpay.
- • History & price updates: save calculations tagged by store and edit prices or weights in saved records at any time.
Accurate unit price calculation for any shopping trip
Fair price per 1 kg, 1 L, or 1 item
Convenient modes for weight (g), volume (ml), and piece count. Enter everyday numbers without clumsy decimals — the app automatically handles units and computes the standard unit rate.
Compare up to 5 items
Add extra comparison columns with a single tap. Easily compare 3, 4, or 5 competing shelf brands side-by-side without clearing your screen.
Calculation history & editing
Save comparisons tagged with store names and notes. If a price tag changes, edit existing items directly in a dedicated screen without re-entering data.
100% Offline operation
Supermarkets are often located in basements or underground structures where signal drops. All calculations run strictly on-device.
Data backup & export
Export and import your entire calculation database to a file. Your price records remain safe when switching devices or resetting your phone.
Zero tracking & total privacy
No registration, phone numbers, or receipt tracking. The app respects your privacy and requires zero unnecessary system permissions.
Clean and intuitive right at the store aisle
Large digits, a responsive numeric keypad, and instant visual indicators of the best deal.
Compare products right at the shelf
History & editable records
Dark theme & data backup
Frequently Asked Questions
Why not just use the phone's built-in calculator?
A standard calculator forces you to divide prices by odd numbers of grams, multiply by 1,000, memorize intermediate figures, and manually calculate percentage differences. In Price Comparator, the keypad is ready on launch: enter the price and quantity in standard grams or milliliters, and the app converts everything to cost per 1 kg or 1 liter and clearly highlights the winner.
Does it require mobile internet at the store?
No. The app does not download remote databases and operates 100% offline. You can comfortably compare prices in basement grocery levels or metal-clad wholesale clubs without any mobile signal.
How does the app help remember prices across different supermarkets?
Every calculation can be saved with the store name and a short description. You can instantly locate past records via search, sort them, and if a store price changes, edit the existing entry directly without having to create a new one from scratch.
Shop smart without overpaying
Install Price Comparator and start saving money on your everyday grocery runs during your next shopping trip.