Unit Price Calculator

Unit price divides package cost by quantity — dollars per ounce, per gram, per sheet, or per count. The lower unit price wins when product quality, brand, and freshness are comparable. Grocery shelf tags sometimes print unit price, but units differ (per oz vs per 100 g), so direct comparison still needs consistent units.

Defaults: Package A $4.99 for 16 oz → $0.31/oz. Package B $7.49 for 28 oz → $0.27/oz. B is cheaper per ounce by about 13%. If you only need 10 oz before spoilage, the smaller A might waste less despite a higher unit rate.

Switch the quantity unit segmenter to US (oz) or metric (g) to match labels. Convert ml versus fl oz manually before comparing liquids — this tool expects both packages in the same unit you select.

Common mistakes include ignoring coupon limits on the bulk size, comparing pre-cooked weight to dry weight, and assuming warehouse club packs always beat supermarket singles after membership fees.

Compare two cereals by entering price and weight from each box label — if one lists net weight in grams and the other in ounces, convert before comparing.

Multipack chips sold as "12 count" use per-each math only if you enter quantity as 12 items with the same unit label — ounces versus count are different units.

Subscription versus single purchase compares per-unit if you normalize months of supply — enter total ounces across the subscription period for fair comparison.

Store brands versus name brands on the same shelf — unit price settles whether the generic is truly cheaper once sizes are normalized.

Liquid versus dry ounces differ for cooking ingredients — use weight ounces for flour and sugar comparisons, not fluid ounces from a volume label.

Limits: two-package comparison only. Does not include shipping, deposit fees, or loyalty discounts that require card membership.