Unit Price Calculator
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Unit Price Comparator
Check which product is actually more profitable. Convert weight, volume and pieces in a second.
This is how much cheaper the selected product is.
When purchasing 10 target units.
to match the unit price with product B.
Always check the price for kg on the store label. Often, larger packaging is not the cheapest option!
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Other tools you may find usefulUnit Price Comparator - check what is really profitable
Two packages look similar, one has a larger "promka", the second is larger, and the third screams "MEGA". And this is where the classic shopping mistake comes in:comparing prices "by eye". This calculator turns marketing into numbers: it calculates theprice per unit(kg, g, l, ml or piece), indicates the cheaper choice and showshow much percentageyou are overpaying, how much you will gain on 10 target units and at what price the more expensive variant would "compensate" for the cheaper one (break-even analysis).
In practice, it works like a personal "anti-hook" on the store shelf: instead of looking at the size of the package, you look at what is most important -how much you pay for the same amount of product. It doesn't matter whether you compare 500 g coffee with 1 kg coffee, 1.7 l washing liquid with 2 l, or toilet paper in packs of 8 and 12 rolls. There is one rule:equalize the unit, calculate the price for this unit and only then make a decision.
What does this calculator solve?
- "-30%" promotions, which are no better than the competition's regular price.
- Different weights and capacities(mg/g/kg, ml/l), which are difficult to compare in your head.
- Packages and multipacks– 6 pcs. vs. 8 pcs. vs. "10+2 for free".
- Different units on thelabel (e.g. price per 100 g vs. price per 1 kg).
- Shopping "in stock"- does larger packaging actually bring profit?
The simplest rule of profitability
The unit price ofis nothing magical:
If you set the target unit tokg, the calculator will convert everything to "price per kg". If you setlyou will get "price per liter". And if you selectpcs, it will calculate the "price per piece" and allow you to compare multipacks.
Pro-tip: in the store you often see the price for100 g- this is just a different target unit. This calculator does the same thing, but without the mental counting.
How to use the unit price comparator - step by step
- Select the type of measurement: mass (weight), volume (liquids) or pieces (quantity). Thanks to this, the calculator knows whether to convert mg/g/kg, ml/l or simply count pieces.
- Set the target unit: e.g. kg (for coffee), l (for liquids), pcs (for packets). This will be the "common denominator" for both products.
- Enter product details A: price and quantity + unit (e.g. PLN 9.99 for 500 g).
- Enter product data B(optional): if you want to compare two variants. When B is empty, the calculator will only calculate the unit price of A - useful for quick verification in the store.
- Click"COMPARE PRICES"and instantly see: price per unit, winner ("CHEAPEST"), percentage difference, savings and break-even analysis.
Units and conversions – why does it matter?
Most errors in comparing offers come from chaos in the units. One package is 750 g, the second is 1.2 kg, the third is 900 g - and suddenly it "seems" that 750 g is cheaper because the price on the label is lower. Except… you pay for less.
| Type | Input units | Target unit | Best use |
|---|---|---|---|
| Weight | mg / g / kg | mg, g or kg | Coffee, rice, meat, food, powder, supplements |
| Volume | ml / l | ml or l | Shampoo, milk, washing liquids, oils, drinks |
| Pieces | pcs | pcs | Paper, batteries, capsules, tissues in packets |
What do "Premium" results mean and how to read them?
When you compare two products, the calculator does more than just say "A cheaper / B cheaper". You get numbers that translate into real purchasing decisions - especially if you buy regularly, make larger purchases or order for a company.
This is the answer to the question:how much more profitable is the cheaper option. Thanks to this, you know whether you are fighting for 2-3% (sometimes it is not worth driving halfway through the city) or 20-30% (this is a real saving).
The tool shows how muchis left in your pocket with 10target units. If the unit is kg, then the saving is per 10 kg. If l – per 10 liters. This is brilliant for "marketable" products: coffee, powder, food, cleaning products.
This is a "leveling-up price": it showshow much the more expensive variantwould have to cost to bring its unit price equal to the cheaper one. Perfect for evaluating promotions: "does this discount make sense?"
An example that works in your head (and on the shelf)
Let's assume a classic case: you compare two products of the same category, but with different packaging. You set the measurement type:mass, target unit:kg.
Product A
- Price: PLN 9.99
- Quantity: 500 g
- Price per 1 kg: PLN 19.98/kg
It looks great on the label ("only 9.99!"), but remember: it's half a kilogram.
Product B
- Price: PLN 15.50
- Quantity: 1000 g
- Price for 1 kg: PLN 15.50/kg
Supposedly more expensive "at the checkout", but calculated per kilogram, it wins. This is exactly what the comparator is for.
In this scenario, the calculator will select the winner (B) and show the percentage difference and savings. If you buy such a product regularly, even a few zlotys per kilogram makes a difference on a monthly and yearly basis.
The most common pitfalls when comparing unit prices
- "Bigger packaging = cheaper"– not always. Sometimes you pay more for "convenience", and a smaller package on sale has a better unit price.
- Different versions of theproduct – e.g. concentrate vs. regular liquid. Then the volume itself does not reflect the "efficiency". If you want, compare "per number of washes" or "per dose" (in pieces mode).
- Net weight vs. drained– cans, jars, pickled products. Compare what you actually eat/use.
- Unit on the label (100 g) vs. your intuition (1 kg)– the brain likes to confuse scales. Set the target unit so that it is natural for you.
- Rounding- for small differences, set greater precision (e.g. 3-4 places) so as not to "lose" the advantage of one product.
Shopping strategies: how to save realistically thanks to the unit price
This calculator is not just a curiosity - it is a simple tool for building a habit. If you use it regularly, you start to see a pattern: the best deals are not where the loudest promotion is, but where theprice per unit ofdrops the most.
1) Always choose a common target unit
Comparing spices? Set "g" or "kg". Are you comparing fluids? "ml" or "l". Are you comparing capsules? "pcs". Then the calculator does all the rest.
Thanks to this, you stop being "delighted" by the price of the entire package and start buying wisely.
2) Look at "saving on 10 units"
A difference of PLN 0.30 per 1 kg may sound like nothing. But if you buy 10 kg per month, it becomes PLN 3. And in a year - PLN 36. And this is only on one product.
This indicator works great for "rotating" products - household chemicals, food, coffee, rice, cereals.
FAQ – questions about the unit price calculator
Can I compare only one product?
Yes. If you leave product B blank, the calculator will calculate the unit price for A. This is useful when you want to quickly verify whether the offer "makes sense at all" or compare it with another unit price visible on the store shelf.
Which target unit should I choose: 100 g or 1 kg?
It's a matter of convenience. 100 g is fine for small products (spices, cosmetics), and 1 kg for larger products (coffee, flour, rice). The most important thing is that you compare both offers in the same unit. If the store shows the price for 100 g, you can set the target "g" and look at the price for 1 g, or think "per kg" - both methods are OK, as long as you are consistent.
Why is a larger package sometimes more expensive?
Because the price of the package is not only about the "contents". There are also the costs of logistics, product positioning, the brand's pricing policy and promotions for smaller sizes. Therefore, the only honest method is to calculate the unit price - that's exactly what this tool does.
Does this work for pieces and multipacks?
Yes. Select the measurement type "Quantity / Pieces", set the target unit "pcs" and enter, for example, 8 pcs for PLN 19.99 and 12 pcs for PLN 27.99. The calculator will show the price for 1 piece and indicate which package is actually better.
Want to buy smarter without counting in your head? Click and compare two variants in seconds:
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