Inventory Accuracy Rate

A WMS data-quality KPI that drives fill rate and picking accuracy. Define “correct” as exact match or within tolerance.

Accuracy % = matched locations ÷ locations counted × 100.

Tip: Keep “Correct Locations” and “Locations Counted” on the same basis (period, units, and population) before calculating Inventory Accuracy Rate.

Cluster: Logistics hub · OTIF rate · Business hub · Percentage guide

Inventory accuracy rate is the share of locations (or SKUs) that matched system quantity during cycle count or audit.

Enter correct counts and total locations counted for the same audit wave.

Locations matching system qty
Locations in the count wave

Inventory Accuracy

Understanding Inventory Accuracy Rate

How we calculate. Accuracy % = matched locations ÷ locations counted × 100. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.

Real-world scenario: A typical Inventory Accuracy Rate case uses correct locations 9700 and locations counted 10000. Enter the same figures below to reproduce the worked path.

What is Inventory Accuracy Rate?

A WMS data-quality KPI that drives fill rate and picking accuracy. Define “correct” as exact match or within tolerance.

  • Location or SKU basis
  • Publish match tolerance
  • Higher is better

The Formula

Inventory Accuracy Rate
Accuracy % = (Correct locations ÷ Locations counted) × 100

Worked Example

Scenario: 9,700 correct of 10,000 locations counted.
Step 1: 9700 ÷ 10000 = 0.97
Step 2: × 100 = 97%
Answer: Inventory accuracy is 97%.

Common Use Cases

  • Cycle count programs: WMS trust
  • Slotting QA: location integrity
  • Audit readiness: book-to-floor

Pro Tips

  • Separate variance value % if needed
  • Root-cause mis-slots vs theft
  • Pair with picking accuracy

Limitations: Inventory Accuracy Rate results are educational logistics and supply-chain planning aids—not SLAs, carrier contracts, or inventory valuation advice. Confirm definitions with your WMS/TMS and finance policies.

FAQ

Unit accuracy vs location accuracy?

This form is location (or SKU) match rate. Unit accuracy weights by quantity—use a labeled variant if required.

What if locations counted is 0?

Accuracy is undefined—enter a positive count of locations audited.

Authoritative References

For logistics and supply-chain KPI definitions, consult:

  • CSCMP — supply chain management resources
  • ASCM / APICS — operations and inventory body of knowledge
  • ISO 28000 — security management for the supply chain (context)