Shopping Guides For Comparing Real Product Value

Pick the kind of comparison you are trying to make. Each guide explains the shopping trap, uses generic examples, and points to the calculator that solves the math.

Quick guide router

Start Here

Use these guides when you want the basic method before choosing a more specific calculator.

Use this calculator: All-in-one unit price calculator

Household Cost Per Use

Use these when the package label uses loads, washes, sheets, pods, rolls, or another usable count.

Use this calculator: cost per load, cost per wash, or cost per sheet.

Food, Drinks, And Protein

Use these when package weight, liquid volume, serving count, or protein grams make the shelf price misleading.

Use this calculator: cost per serving, cost per ounce, cost per fluid ounce, or cost per gram protein.

Shrinkflation

Use these when an old package and a new package changed but the shelf price does not tell the full story.

Use this calculator: shrinkflation calculator.

Bulk And Package Value

Use these when bigger packs, refill packs, or bulk quantities may not be cheaper after the real usable amount.

Use this calculator: bulk value calculator or cost per fluid ounce calculator.