Closing Stock Calculator
Too much stock or too little? Spot products that need a closer look.
Check what is left with the stockist and roughly how long it will last.
Coverage estimates help you discuss replenishment before stock runs low.
How to use this tool
- Use the same unit for each product, such as packs.
- Enter opening stock, receipts and sales for one period.
- Enter average monthly sales to estimate coverage in days.
Enter your details
Example shown. Changes save on this device.
How the calculation works
Closing stock = opening + received − sold. Coverage days = closing stock ÷ average monthly sales × 30.
Are my entries saved or sent anywhere?
Your entries stay in this browser on this device. We do not receive them or send them to your company. On a shared device, clear saved site data when finished; copy important results somewhere safe first.
Does this replace my company’s reporting app?
Use this for your own calculations and report preparation. Submit official reports and claims through the method your company requires.
Offline setup needs a successful first visit.
Calculator reviewed: October 2026