Backorder Rate Calculator
Use the Backorder Rate Calculator. Enter Backordered units and Units ordered for a clear result, formula explanation, and practical planning checks.
Backorder Rate measurements
Enter your values, then calculate.
Result
How to calculate backorder rate
Backorder rate measures the percentage of ordered units that couldn't be fulfilled immediately from available stock — an inventory management metric for tracking stockout frequency.
How the calculation works
Backorder rate = (Backordered units ÷ Units ordered) × 100.
Example
45 backordered units out of 900 units ordered: Backorder rate = (45 ÷ 900) × 100 = 5%.
Frequently asked questions
How is Result calculated?
Result = ([Backordered units] ÷ [Units ordered]) × 100.
Is the Backorder Rate Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Backorder Rate Calculator
Backorder rate = (Backordered units ÷ Units ordered) × 100.
Let's understand your backorder rate result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Backorder Rate
- Track backorder rate by SKU to identify which specific products have chronic stocking issues versus one-time supply disruptions.
- A rising backorder rate trend can be an early signal to adjust reorder points or safety stock levels before it affects customer satisfaction more broadly.
Common Backorder Rate Mistakes to Avoid
- Looking at an aggregate backorder rate across all products without breaking it down by SKU, which can hide a few chronically under-stocked items within an otherwise healthy average.
When to Use This Calculator
Backorder rate measures the percentage of ordered units that couldn't be fulfilled immediately from available stock — an inventory management metric for tracking stockout frequency.