📌 Overview

Compare up to four package sizes and instantly see which one really costs less per unit — the bigger box is not always the better deal.

🛒 Unit Price Calculator

Compare up to four package sizes and instantly see which one really costs less per unit — the bigger box is not always the better deal.

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📋 How to Use

Enter the price and quantity for each option.
Use the same unit across all options (g, ml, pieces…).
Click Compare.
The cheapest option is highlighted with the savings shown.

❓ FAQ

Is the bigger pack always cheaper?

No. Retail studies regularly find larger packs with a higher unit price, especially on promotion-heavy items. Always check the per-unit number.

What units should I use?

Anything, as long as all options use the same one. Comparing grams against kilograms will give a meaningless result.

❓ More Questions

Is the big pack always cheaper?

Not necessarily. Retail surveys often find the large pack has a higher unit price, especially on promoted items. Make a habit of checking the unit price.

What unit do I enter?

Any unit works, but all options must use the same one. Mixing grams and kilograms gives completely wrong conclusions.

💡 Use Cases

🛍️

Grocery Run

Pick the genuinely cheaper pack.

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Bulk Buying

Check if bulk really saves money.

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In Store

Compare on your phone at the shelf.

🔗 Related Tools

📖 Deep Dive: Unit Price Calculator

Why calculate unit price

Packages vary wildly: 500g for 29.9 and 1.2kg for 68 - which is cheaper? Comparing total prices is meaningless; you must convert to a unit price under the same unit: the former is 0.0598 per g, the latter 0.0567 per g, so the larger pack wins slightly.

Common pricing traps

The bigger is cheaper mindset: sellers exploit this by setting a higher unit price on large packs.

Promo vs original: a discounted mid-size pack can beat the large pack.

Spec tweaks: packaging looks the same but content drops from 500g to 450g - shrinkflation.

How it is calculated

Unit price = total price divided by quantity. This tool automatically finds the lowest unit price and shows how much you save versus the most expensive option.

Practical tips

Store shelf labels usually show a small-print unit price, but the unit may differ.

Short-shelf-life items in a big pack you can't finish end up more expensive.

Multiply unit price by what you actually consume to get the true cost.