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.
Enter stock and daily use to see how long it lasts.
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.