Understanding Order Fill Rate
How we calculate. Fill rate % = shipped quantity ÷ ordered quantity × 100. See our methodology and accuracy policy .
Real-world scenario: A typical Order Fill Rate case uses units shipped 9400 and units ordered 10000. Enter the same figures below to reproduce the worked path.
What is Order Fill Rate?
A demand-fulfillment KPI. Line fill and case fill variants use the same structure with different unit definitions.
- Same UOM for shipped and ordered
- Backorders usually reduce fill unless policy says otherwise
- Can be under 100% when short
The Formula
Worked Example
Common Use Cases
- Inventory planning: stockout impact
- Customer service: fulfillment quality
- S&OP: demand vs supply gaps
Pro Tips
- State line vs order fill
- Exclude cancelled demand if appropriate
- Segment A-items for focus
| Scenario | When to use |
|---|---|
| Percent of a number | Finding a part of a whole (tax, tip, score) |
| Percent change | Comparing old vs new values |
Limitations: Order Fill 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.
Common mistakes
- Swapping part and whole: The denominator must be the full total, not a subset.
- Rounding too early: Carry extra decimal places through multi-step work before rounding the final percent.
- Mixing percent and decimal forms: Enter rates in the format the calculator labels expect.
The worked example for order fill rate was verified with the calculator form on this page—enter the same values to confirm the result.
When to use this calculator
- Use this page when your wording matches order fill rate and the form labels on screen.
- Use percent of a number for “what is X% of Y?” problems.
- Use number is what percent when you know part and whole and need the percent.
Still unsure about order fill rate? Start with the quick answer above, then open the linked calculator that matches your wording.
❓ Frequently Asked Questions
How do I use this order fill rate calculator?
For order fill rate, enter the values labeled on the form, then press Calculate. Compare the result to the worked example on this page.
What formula does this page use?
See the quick answer and formula box above for order fill rate—the same percentage calculator expression is applied to your inputs.
What if my result looks wrong?
When checking order fill rate, re-check part vs whole (or rate vs base), rounding, and whether percents were entered as 25 rather than 0.25 when the form expects percents.
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)