Months of Supply Calculator
Work out how many months of supply you have from stock and usage rate.
Compare Your Options And Get Clear Answers
Work out how many months of supply you have from stock and usage rate.
Months of Supply Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Months Quick Guide
Typical values for reference.
| Units in stock | Units used per month | Lead time (months) | Months of supply |
|---|---|---|---|
| 600 | 150 | 1.5 | 4.00 months |
| 300 | 150 | 1.5 | 2.00 months |
| 600 | 300 | 1.5 | 2.00 months |
| 1200 | 100 | 1.5 | 12.0 months |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Months of Supply Calculator FAQ
Answers to common questions about this calculator.
It uses the formula shown with your inputs. Real conditions vary, so treat it as a guide.
Include safety stock.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.
Yes. Replace each input with your own figures and the result updates instantly.