What is a unit price?

A unit price is the cost of one standard unit of a product — one ounce, one liter, one item — rather than the price of the whole package. It lets you compare products of different sizes on a level playing field, which the sticker price alone can't do.

How do I compare products measured in different units, like ounces and pounds?

Enter each item with its own unit (ounces, pounds, liters, etc.) and the calculator converts everything to a shared base unit — grams for weight, milliliters for volume — using standard conversion factors, so you never have to do the math by hand.

Is this unit price calculator free?

Yes. It's completely free, requires no account, and the underlying unit conversion data is also available as a free public API for developers.

What units does the calculator support?

Around 40 units across four categories: weight (oz, lb, g, kg), volume (fl oz, cup, L, gal), count & packaging (each, dozen, pack), and length & area (in, ft, sq ft, m).

Can I scan a receipt or price tag instead of typing everything in?

Yes. Use "Scan Photos" to upload one or more images — receipts, shelf price tags, or photos of the product itself — and the tool extracts the name, price, quantity, and unit automatically.

Why does a bigger package sometimes cost more per unit than a smaller one?

Packaging size and price aren't always proportional — a "family size" or "value pack" is sometimes priced at a worse rate per ounce than the regular size, particularly during sales on the smaller option. Unit price is the only way to catch this instead of assuming bigger means cheaper.

Unit Tracking — Grocery List Unit Price Calculator & Conversion API

Categories

Volume: 13
Weight: 8
Count & Packaging: 8
Length & Area: 11

Unit Tracking Conversion Protocol
Code	Name	Category
ML	Milliliter	Volume
CL	Centiliter	Volume
DL	Deciliter	Volume
L	Liter	Volume
TSP	Teaspoon (US)	Volume
TBSP	Tablespoon (US)	Volume
FL_OZ	Fluid Ounce (US)	Volume
IMP_FL_OZ	Fluid Ounce (Imperial)	Volume
CUP	Cup (US)	Volume
PT	Pint (US)	Volume
QT	Quart (US)	Volume
GAL	Gallon (US)	Volume
IMP_GAL	Gallon (Imperial)	Volume
MG	Milligram	Weight
G	Gram	Weight
KG	Kilogram	Weight
OZ	Ounce	Weight
LB	Pound	Weight
STONE	Stone	Weight
TON_US	Ton (US Short Ton)	Weight
TON_METRIC	Metric Ton	Weight
EA	Each	Count & Packaging
CT	Count	Count & Packaging
PR	Pair	Count & Packaging
DOZ	Dozen	Count & Packaging
PK	Pack	Count & Packaging
ROLL	Roll	Count & Packaging
SHEET	Sheet	Count & Packaging
SERV	Serving	Count & Packaging
MM	Millimeter	Length & Area
CM	Centimeter	Length & Area
M	Meter	Length & Area
IN	Inch	Length & Area
FT	Foot	Length & Area
YD	Yard	Length & Area
SQ_CM	Square Centimeter	Length & Area
SQ_IN	Square Inch	Length & Area
SQ_FT	Square Foot	Length & Area
SQ_YD	Square Yard	Length & Area
SQ_M	Square Meter	Length & Area