Unit Price Compare
Enter two products' price and quantity to find which has the lower per-unit price and the saving.
Input Data
Results
At a glance:Unit price is the total price divided by quantity — the price per one unit — used to fairly compare items of different pack sizes. Formula: unit price = total price ÷ quantity. The lower unit price is the better deal; the saving = absolute difference between the two unit prices.
Formula
unit price = total price ÷ quantity (per piece / L / kg).
better deal = the one with the lower unit price.
saving per unit = |unit A − unit B|.
How to Use
- Enter product A's total price and quantity.
- Enter product B's total price and quantity.
- The tool computes both unit prices and flags the better deal with the saving.
Case Studies
Convenience vs bulk
A: 6 for $39.9 → $6.65 per piece.
B: 24 for $68 → $2.83 per piece; B saves $3.82 per piece, about 57% cheaper.
FAQ
Why isn't a big pack always cheaper?
Mostly big packs have a lower unit price, but sometimes makers price popular family packs with a premium, or promos apply only to small packs. Always compare unit price, not just the total — that is what this tool is for.
Different quantity units?
Both quantities should use the same unit (pieces, litres or kg). If A is 1.5 L and B is 500 mL × 3, first convert B to 1.5 L. The tool divides by whatever you enter, so keep units consistent for a meaningful comparison.
Is 'saving per unit' the total saving on the whole batch?
No — it is the difference per single unit. Total saving ≈ saving per unit × the quantity you actually buy. E.g. $3.82 saved per piece × 24 pieces ≈ $91.7.
Near-expiry or on-sale items?
A sale can make a big pack's unit price exceed a small pack's; also watch the shelf life — buying a large pack that expires is wasteful. Compute unit price, then decide by your consumption speed.
Are bundle deals worth it?
Bundles sometimes include items you don't need. First compute the unit price of what you'll actually use, then judge whether it beats buying separately; unused extras are effectively a price hike.
Too many decimals?
The tool shows fractions of a dollar for precise comparison; actual payment rounds. When the gap is tiny (e.g. $0.01/unit), prefer other factors like freshness, brand and return convenience.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.