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Deal calculators

Four calculators for the questions a sale raises. Each shows its formula and a worked example; nothing you type leaves the page.

Price per ounce calculatorWhich size or pack is cheaper?
Stock-up savings calculatorHow much should you buy on sale?
Cost per serving calculatorWhat does each bowl or cup cost?
Subscribe & Save calculatorIs the subscription cheaper over a year?

Guides behind the math

Unit pricing · 6 min read

How to Compare Grocery Prices Per Ounce

The shelf-tag method for online grocery: find the net weight, count every container, convert units, and compare pantry packs by price per ounce.

Planning · 8 min read

How to Stock a Pantry on a Budget

A step-by-step plan for building a useful pantry without overspending: start from meals you cook, buy staples on price drops, and rotate stock.

Storage · 7 min read

Pantry Shelf Life and Storage, Staple by Staple

Which pantry staples keep longest, which go stale first, and how to store flour, rice, oils, nuts, spices, and cans so a stock-up does not go to waste.

Date labels · 5 min read

Best-By vs Use-By Dates on Pantry Food

What “best if used by,” “use by,” and “sell by” mean on shelf-stable food, why they are about quality, and how to factor dates into a stock-up.

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Deals on beauty & household essentials, checked against 90 days of prices. Published by Christopher Lucas.

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As an Amazon Associate I earn from qualifying purchases. Prices and availability are set by Amazon and can change after our check; the price at Amazon checkout is the one that counts. Discount Pantry links to Amazon and does not sell products itself.