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Unit Price Calculator

The Unit Price Calculator is a free cost-per-unit comparison tool in the SoapBox tools suite. It answers the everyday grocery-aisle question — which pack is actually the better value — by reducing each option to its price per unit.

What it does

Enter each option's price and size (in whatever unit you choose — grams, millilitres, or items), and the calculator gives the price per unit for each and highlights the best value. A pack count handles multi-buys, so a four-pack and a single bottle can be compared fairly. Options that are cheaper on the sticker but worse per unit are flagged with how much more they cost relative to the best option.

How to use it

Add as many options as you like; the comparison updates as you type. It runs entirely in the browser, needs no account, and sends nothing anywhere. A JSON API is available at /api/unit, taking a compact list of "price@size" (optionally "price@size×pack") entries.

See also

• SoapBox Tools
• Percentage Calculator
• Soap Calculator

Sources

• Standard arithmetic; no external data source.

Coverage

Describes the SoapBox Unit Price Calculator: comparing price per unit across products, handling pack counts, and flagging the best value.

Filed under  Tools