How it works
Days of stock = units on hand ÷ average units used per day.
Free calculator / Operations
Days of stock calculator.
Estimate how long current units will last at an average daily usage rate.
Your numbers
Change any value. The result updates here in your browser.
Your answer
A quick example
240 units at 8 units per day gives 30 days of stock.
This is a calculation from numbers you supply, not financial or tax advice. Check assumptions before making a decision.