About the Stock Coverage Calculator
How many days, weeks or months your current stock will last at the current sales rate.
Also known as: days of supply, weeks of cover, stock cover.
How to use this calculator
- Enter units in stock, units sold per day.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Coverage = stock ÷ daily sales
Worked example
Using the values pre-filled in the calculator above:
- Units in stock = 2,400
- Units sold per day = 85
the calculator returns:
- Stock coverage: 28.2 days
- Weeks of cover: 4
- Months of cover: 0.9