---
title: "Unit pricing: comparing value at the store"
license: public-domain
license_url: https://creativecommons.org/publicdomain/mark/1.0/
source: https://nvlpubs.nist.gov/nistpubs/SpecialPublications/1181e2025/NIST.SP.1181e2025.html
source_license: "public domain (US government work)"
attribution: "Summary by iinventedlight (AI-assisted). Source: National Institute of Standards and Technology, \"Unit Pricing Guide (NIST SP 1181, 2025 ed.)\" (public domain (US government work))."
condensed_by: "iinventedlight (Grok Bot, AI-assisted)"
fact_checked: 2026-11-02
date: 
status: reviewed
reviewed_on: 2026-11-02
category: products
checked_on: 2026-11-02
license_url: https://creativecommons.org/publicdomain/mark/1.0/
source: https://nvlpubs.nist.gov/nistpubs/SpecialPublications/1181e2025/NIST.SP.1181e2025.html
source_license: "public domain (US government work)"
license_note: "Every fact below restates US government public-domain pages listed under sources. This summary is also offered as public domain."
attribution: "Summary by iinventedlight (AI-assisted). Courtesy of National Institute of Standards and Technology. Public domain (US government work); use does not imply endorsement by National Institute of Standards and Technology."
condensed_by: "iinventedlight (Grok Bot, AI-assisted)"
fact_checked: 2026-11-02
date: 2026-11-02
category: products
tags: products, shopping, unit-pricing
checked_on: 2026-11-02
sources:
  - id: S1
    title: "Unit Pricing Guide (NIST SP 1181, 2025 ed.)"
    publisher: National Institute of Standards and Technology
    url: https://nvlpubs.nist.gov/nistpubs/SpecialPublications/1181e2025/NIST.SP.1181e2025.html
    accessed: 2026-11-02
    license: "public domain (US government work)"
  - id: S2
    title: "Uniform Unit Pricing: Tools for Consumers to Fight Shrinkflation"
    publisher: National Institute of Standards and Technology
    url: https://www.nist.gov/programs-projects/uniform-unit-pricing-tools-consumers-fight-shrinkflation
    accessed: 2026-11-02
    license: "public domain (US government work)"
---
# Unit pricing: comparing value at the store

# Unit pricing: comparing value at the store

## Summary
The unit price is the cost per ounce, per pound, per count or similar. Divide the total price by the quantity, in the same unit, to see which package is the better deal.

*Draft. License: public domain (US government work). Sources: [S1] National Institute of Standards and Technology, "Unit Pricing Guide (NIST SP 1181, 2025 ed.)"; [S2] National Institute of Standards and Technology, "Uniform Unit Pricing: Tools for Consumers to Fight Shrinkflation".*

## Facts
- id: F1
  claim: Unit price equals the total price divided by the quantity in a standard unit such as ounces.
  confidence: high
  date: 2026-11-02
  sources: [S1, S2]
  license: public domain (US government work)
  checked_on: 2026-11-02
- id: F2
  claim: Compare only in the same unit; convert first (for example 1 pound = 16 ounces).
  confidence: medium
  date: 2026-11-02
  sources: [S1]
  license: public domain (US government work)
  checked_on: 2026-11-02
- id: F3
  claim: Unit prices help spot shrinkflation, where a package gets smaller while the price stays the same.
  confidence: medium
  date: 2026-11-02
  sources: [S2]
  license: public domain (US government work)
  checked_on: 2026-11-02
- id: F4
  claim: Unit price labeling rules differ by state, and NIST publishes a model guide for consistent shelf labels.
  confidence: high
  date: 2026-11-02
  sources: [S1, S2]
  license: public domain (US government work)
  checked_on: 2026-11-02