Days of Supply Calculator
Enter how much stock you have and how much is used per day — ration, medicine, chicken feed, anything — and see the days it will last and the date it runs out.
How to use
- Enter the stock you have and the unit name (kg, litres, tablets).
- Enter the average daily use in the same unit.
- Read the days of supply, the run out date, and the reorder date after your safety buffer.
Days of supply is simply stock divided by daily use, assuming steady consumption. The reorder date subtracts your safety buffer so you restock before the stock actually finishes.
Frequently Asked Questions (FAQ)
What does the days of supply calculator do?
Enter your stock on hand and daily use for anything, such as ration, medicine or chicken feed, and it shows how many days the stock will last, the run out date, and the reorder date after your safety buffer.
Can I use my own units?
Yes. You can label the unit yourself (kg, litres, tablets) as long as stock and daily use use the same unit.
What is the safety buffer for?
It is the number of days before the run out date when you should reorder. The tool subtracts it from the run out date so you restock before the stock actually finishes.
Does it assume steady use?
Yes. Days of supply is simply stock divided by daily use, so the result assumes you keep using the same amount every day.