Order Fill Rate Calculator
Measure how many units in an order demand were fulfilled completely in the chosen period or fulfilment window.
How to use this calculator
- Enter total ordered units and the portion shipped complete on first fulfilment.
- Check that every input uses the stated units and covers the same period, population or project scope.
- Change one assumption at a time when comparing scenarios.
Formula used by order fill rate calculator
Order fill rate = units shipped complete ÷ units ordered × 100
- Order fill rate = units shipped complete ÷ units ordered × 100
- Choose one consistent approach for backorders, substitutions, split shipments and cancellation handling.
- Inputs are validated against the tool-specific constraints; displayed results are rounded for readability.
Worked examples
Worked example
If 1,110 of 1,200 ordered units were shipped complete on first fulfilment, the unit fill rate is 92.5%.
The tool reports fill rate and units not filled complete.
The tool reports fill rate and units not filled complete.
Understanding the result
Measure how many units in an order demand were fulfilled completely in the chosen period or fulfilment window.
Choose one consistent approach for backorders, substitutions, split shipments and cancellation handling.
Important notes
Choose one consistent approach for backorders, substitutions, split shipments and cancellation handling.
Treat the result as an estimate for the assumptions entered; verify important specifications against the relevant source or professional guidance.
Frequently asked questions
Is unit fill rate the same as order fill rate?
Not always. This calculator uses unit counts; order-level fill rate counts whole orders instead.
What window should I use?
Use the same operational window used by your inventory or fulfilment reporting.
How should I use this result?
Enter total ordered units and the portion shipped complete on first fulfilment.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.