Calculation playbook

Value Comparison Playbook: Unit Prices, Pizza and Subscriptions

Value comparisons work best when you divide the cost by the thing you actually care about: ounces, servings, square inches, months or uses.

Unit price is a translation

A unit price turns two messy choices into the same language. If one item is larger and more expensive, the unit price tells you whether it is actually better value or just bigger.

Pizza is secretly geometry

A pizza's value depends on area, not just diameter. A 16-inch pizza has much more area than a 12-inch pizza because area uses radius squared. The Pizza Value Calculator turns that into cost per square inch.

Recurring costs need time

Subscriptions are unit prices with time as the unit. A monthly price is useful, but a yearly total is harder to ignore. Use the Subscription Cost Calculator when you want the full stack.

Cheap is not always best

Unit price helps with clarity, but it does not make the decision alone. Waste, storage, quality and preference matter. The goal is to know the tradeoff before choosing.

Play it: value in two worlds

Open the Pizza Value Calculator. Compare a 12-inch pizza at 12 with a 16-inch pizza at 18. Watch cost per square inch, not just total price.

Then open the Subscription Cost Calculator. Enter 9.99 and 5 subscriptions. Pizza value uses square inches; subscriptions use months and years. Both are value calculations, but the unit changes the decision.