Quick answer
Unit Price Comparison Calculator quick answer
Formula: Unit price = package price ÷ package quantity.
Example: $12.99 for 16 units is about $0.812 per unit. $17.49 for 24 units is about $0.729 per unit, making option B cheaper per unit.
Reviewed September 1, 2026 · Methodology
Worked example
$12.99 for 16 units is about $0.812 per unit. $17.49 for 24 units is about $0.729 per unit, making option B cheaper per unit.
What to do with the result
Compare quantities measured in the same unit. A lower unit price may still be a worse purchase if you will waste or never use the larger quantity.
Public API & AI agent access
Yes — this calculator is callable programmatically. Use GET /api/v1/unit-price-compare, the public calculator API, or tannerd.net's MCP, A2A and WebMCP agent interfaces. Results include a human-facing citation URL.
Frequently asked questions
How do I compare two package sizes?
Divide each price by its quantity using the same unit of measurement.
Does a bigger package always have a lower unit price?
No. Calculate both rather than assuming bulk packaging is cheaper.
Formula provenance
API identifier: unit-price-compare · Formula version: tncalc.unit-price-compare.1.0.0 · Engine release: 6.6.1. Build provenance · Public validation · Release history.